WO2023188826A1 - 発光装置、発光装置の製造方法、測距装置 - Google Patents
発光装置、発光装置の製造方法、測距装置 Download PDFInfo
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- WO2023188826A1 WO2023188826A1 PCT/JP2023/003779 JP2023003779W WO2023188826A1 WO 2023188826 A1 WO2023188826 A1 WO 2023188826A1 JP 2023003779 W JP2023003779 W JP 2023003779W WO 2023188826 A1 WO2023188826 A1 WO 2023188826A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/42—Arrays of surface emitting lasers
- H01S5/423—Arrays of surface emitting lasers having a vertical cavity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
- G01C3/02—Details
- G01C3/06—Use of electric means to obtain final indication
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/0206—Substrates, e.g. growth, shape, material, removal or bonding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0233—Mounting configuration of laser chips
- H01S5/0234—Up-side down mountings, e.g. Flip-chip, epi-side down mountings or junction down mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0233—Mounting configuration of laser chips
- H01S5/02345—Wire-bonding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0235—Method for mounting laser chips
- H01S5/02355—Fixing laser chips on mounts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
- H01S5/0425—Electrodes, e.g. characterised by the structure
- H01S5/04256—Electrodes, e.g. characterised by the structure characterised by the configuration
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
- H01S5/183—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
- H01S5/183—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
- H01S5/18305—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL] with emission through the substrate, i.e. bottom emission
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S2301/00—Functional characteristics
- H01S2301/17—Semiconductor lasers comprising special layers
- H01S2301/176—Specific passivation layers on surfaces other than the emission facet
Definitions
- the present disclosure relates to a light emitting device, a method for manufacturing a light emitting device, and a distance measuring device.
- VCSEL Vertical Cavity Surface Emitting Laser
- LDD Laser Diode Driver
- An object of the present disclosure is to provide a light emitting device and a distance measuring device with excellent reliability.
- a light-emitting device includes a first base, the first base including a first substrate, a light-emitting element disposed on a first surface of the first substrate, and having a multilayer film, and a light-emitting element disposed on a first surface of the first substrate; a structure disposed in an inter-element region of the light emitting element on one surface, and the structure has the same multilayer film as the light emitting element or is made of the same material as the first substrate. be done.
- the first base may further include an insulating film laminated on the first surface so as to fill a gap between the light emitting element and the structure.
- the insulating film may be made of an inorganic material.
- the first base may have a first electrode pad disposed on the top of the light emitting element, and the height of the top of the structure may be lower than the height of the top of the first electrode pad.
- the first base body may further include a common electrode that extends onto the first surface of the first substrate, which is a bottom surface of a gap between the light-emitting element and the structure. .
- the first base body may further include a first electrode pad placed on the top of the light emitting element, and a dummy electrode pad placed on the top of the structure.
- the first base further includes a lens provided on a second surface of the first substrate that is opposite to the first surface, and condensing light emitted from the light emitting element. It may have a part.
- the light emitting device further includes a second base bonded to the first base, the second base including a second substrate and a second electrode pad disposed on the second substrate, The first electrode pad of the first base and the second electrode pad of the second base may be joined. The first electrode pad and the second electrode pad may be joined by direct bonding.
- a method for manufacturing a light emitting device includes: a first substrate; a light emitting element disposed on a first surface of the first substrate and having a multilayer film; and an element of the light emitting device on the first surface. a structure disposed in an intermediate region; and a first electrode pad disposed on the top of the light emitting element, the structure having the same multilayer film as the light emitting element; the second electrode of the second base, which includes a first step of producing a first base made of the same material as the substrate; a second substrate; and a second electrode pad disposed on the second substrate. a second step of bonding the first electrode pad of the first base to a pad; and a third step of thinning the first substrate from a second surface side that is the opposite surface to the first surface. , is provided.
- the method for manufacturing a light emitting device may further include a fourth step of forming a lens portion on the second surface of the first substrate to condense light emitted from the light emitting element.
- a distance measuring device includes a light emitting device, a light receiving section, and a light emitting signal of the light emitting device and the light receiving section when the light emitting signal of the light emitting device is reflected by an object and received by the light receiving section.
- a distance measuring section that measures a distance to an object based on a light reception signal of a light receiving section, the light emitting device includes a first substrate, and a multilayer film disposed on a first surface of the first substrate.
- the structure has the same multilayer film as the light emitting element, or the structure has the same multilayer film as the light emitting element, or It is made of the same material as the first substrate.
- FIG. 1 is a longitudinal cross-sectional view showing the configuration of a light emitting device according to a first embodiment.
- 2 is a cross-sectional view showing the configuration of the light emitting device of the first embodiment, taken along the line AA in FIG. 1.
- FIG. FIG. 2 is an enlarged vertical cross-sectional view showing the configuration around the light emitting element of the light emitting device of the first embodiment, and shows area B in FIG. 1.
- FIG. FIG. 2 is a front view showing the configuration of an LD chip in the light emitting device of the first embodiment.
- 5 is a vertical cross-sectional view showing the configuration of an LD chip in the light emitting device of the first embodiment, and shows a cross section taken along the line CC in FIG. 4.
- FIG. 1 is a longitudinal cross-sectional view showing the configuration of a light emitting device according to a first embodiment.
- 2 is a cross-sectional view showing the configuration of the light emitting device of the first embodiment, taken along the line AA in FIG. 1.
- FIG. 1 is a vertical cross-sectional view schematically showing a method for manufacturing a light emitting device according to a first embodiment
- FIG. FIG. 6A is a longitudinal cross-sectional view following FIG. 6A.
- FIG. 6B is a longitudinal cross-sectional view following FIG. 6B.
- FIG. 3 is a longitudinal cross-sectional view showing the configuration of an LD chip in a light emitting device of a comparative example.
- FIG. 2 is a vertical cross-sectional view schematically showing a method for manufacturing a light emitting device of a comparative example. It is a longitudinal cross-sectional view following FIG. 8A.
- FIG. 2 is a longitudinal cross-sectional view showing an example of a method for manufacturing the light emitting device of the first embodiment.
- FIG. 9A is a longitudinal cross-sectional view following FIG. 9A.
- FIG. 9B is a longitudinal cross-sectional view following FIG. 9B.
- FIG. 9C is a longitudinal cross-sectional view following FIG. 9C.
- FIG. 9D is a longitudinal cross-sectional view following FIG. 9D.
- FIG. 9E is a longitudinal cross-sectional view following FIG. 9E.
- FIG. 9F is a longitudinal cross-sectional view following FIG. 9F. It is a longitudinal cross-sectional view following FIG. 9G.
- FIG. 9H is a longitudinal cross-sectional view following FIG. 9H.
- FIG. 9I is a longitudinal cross-sectional view following FIG. 9I.
- FIG. 9J is a longitudinal cross-sectional view following FIG. 9J.
- FIG. 9I is a longitudinal cross-sectional view following FIG. 9I.
- FIG. 9J is a longitudinal cross-sectional view following FIG. 9J.
- FIG. 9I is a
- FIG. 9K is a longitudinal cross-sectional view following FIG. 9K.
- FIG. 7 is a longitudinal cross-sectional view showing the configuration of an LD chip in a light emitting device of a second embodiment.
- 11 is a cross-sectional view showing the configuration of an LD chip in the light emitting device of the second embodiment, and shows a cross section taken along line DD in FIG. 10.
- FIG. FIG. 7 is a vertical cross-sectional view showing an example of a method for manufacturing a light emitting device according to a second embodiment.
- FIG. 12A is a longitudinal cross-sectional view following FIG. 12A.
- FIG. 12B is a longitudinal cross-sectional view following FIG. 12B.
- FIG. 12C is a longitudinal cross-sectional view following FIG. 12C.
- FIG. 12A is a longitudinal cross-sectional view following FIG. 12A.
- FIG. 12B is a longitudinal cross-sectional view following FIG. 12B.
- FIG. 12C is a longitudinal cross-
- FIG. 12D is a longitudinal cross-sectional view following FIG. 12D.
- FIG. 7 is a longitudinal cross-sectional view showing the configuration of an LD chip in a light emitting device of a third embodiment.
- 14 is a cross-sectional view showing the configuration of an LD chip in a light emitting device of a third embodiment, and shows a cross section taken along line EE in FIG. 13.
- FIG. 7 is a longitudinal cross-sectional view showing the configuration of an LD chip in a light emitting device of a fourth embodiment.
- 16 is a cross-sectional view showing the configuration of an LD chip in the light emitting device of the fourth embodiment, and shows a cross section taken along line FF in FIG. 15.
- FIG. 7 is a longitudinal cross-sectional view showing the configuration of an LD chip in a light emitting device of a third embodiment.
- 14 is a cross-sectional view showing the configuration of an LD chip in a light emitting device of a third embodiment, and shows a cross section
- FIG. 18 is a vertical cross-sectional view showing the configuration of an LD chip in the light emitting device of the fifth embodiment, and shows a cross section taken along line GG in FIG. 17.
- FIG. 19 is a cross-sectional view showing the structure of the LD chip in the light emitting device of the fifth embodiment, and shows a cross section taken along line HH in FIG. 18.
- FIG. 7 is a longitudinal cross-sectional view showing the configuration of an LD chip in a light emitting device of a sixth embodiment.
- 21 is a cross-sectional view showing the structure of the LD chip in the light emitting device of the sixth embodiment, and shows the II cross section in FIG. 20.
- FIG. 7 is a longitudinal cross-sectional view showing the configuration of an LD chip in a light emitting device of a seventh embodiment. It is a longitudinal cross-sectional view showing an example of the manufacturing method of the light emitting device of a 7th embodiment.
- FIG. 23A is a longitudinal cross-sectional view following FIG. 23A.
- FIG. 23B is a longitudinal cross-sectional view following FIG. 23B.
- FIG. 23C is a longitudinal cross-sectional view following FIG. 23C.
- FIG. 23D is a longitudinal cross-sectional view following FIG. 23D.
- FIG. 23E is a longitudinal cross-sectional view following FIG. 23E.
- FIG. 23F is a longitudinal cross-sectional view following FIG. 23F.
- FIG. 23A is a longitudinal cross-sectional view following FIG. 23A.
- FIG. 23B is a longitudinal cross-sectional view following FIG. 23B.
- FIG. 23C is a longitudinal cross-sectional view following FIG. 23C.
- FIG. 1 is a block diagram illustrating a configuration example of a distance measuring device as an implementation example of a light emitting device according to an embodiment of the present disclosure.
- FIG. 2 is an explanatory diagram of the STL method.
- FIG. 2 is an explanatory diagram of the distance measurement principle of the STL method.
- FIG. 1 is a block diagram showing a schematic configuration example of a vehicle control system that is an example of a mobile object control system.
- FIG. 3 is a diagram showing an example of an installation position of an imaging unit.
- FIG. 1 is a longitudinal cross-sectional view showing the configuration of a light emitting device 10 according to the first embodiment.
- FIG. 2 is a cross-sectional view showing the configuration of the light emitting device 10 of the first embodiment, taken along the line AA in FIG. 1.
- FIG. 3 is an enlarged vertical cross-sectional view showing the configuration around the light emitting element 22 of the light emitting device 10 of the first embodiment, and shows region B in FIG.
- the light emitting device 10 of the first embodiment includes an LD (Laser Diode) chip 20 and an LDD substrate 30 bonded to the LD chip 20.
- the LD chip 20 may be referred to as a "first base”
- the LDD substrate 30 may be referred to as a "second base”.
- the LD chip 20 includes a substrate 21, a plurality of light emitting elements 22, a structure 23, an insulating film 24, individual electrodes 25, and a common electrode 26. Further, the substrate 21 has a plurality of lens parts 21a. Furthermore, the LD chip 20 has a gap 27 filled with an insulating film 24 between the light emitting element 22 and the structure 23.
- the substrate 21 is a substrate made of a compound semiconductor such as GaAs.
- the surface of the substrate 21 facing the LDD substrate 30 is the front surface S1, and the opposite surface is the back surface S2.
- the front surface S1 of the substrate 21 will be referred to as the "first surface”
- the back surface S2 will be referred to as the "second surface”.
- the substrate 21 of the LD chip 20 is sometimes referred to as a "first substrate.”
- the light emitting elements 22 are back-illuminated VCSELs each having a mesa structure. A plurality of light emitting elements 22 are distributed and arranged on the first surface S1 of the substrate 21. Further, the light emitting element 22 is constituted by a multilayer film 22L, as shown in FIG. That is, the light emitting element 22 has a multilayer film 22L.
- the multilayer film 22L has a structure in which a first mirror layer 221, a first spacer layer 222, an active layer 223, a second spacer layer 224, and a second mirror layer 225 are sequentially laminated from the substrate 21 side.
- the first mirror layer 221 and the second mirror layer 225 are composed of, for example, a multilayer reflective mirror.
- the light emitting element 22 causes the laser light generated in the active layer 223 to resonate between the first mirror layer 221 and the second mirror layer 225 to improve the light intensity and emit it from the second surface S2 side of the substrate 21.
- the LD chip 20 of the first embodiment has a plurality of light emitting elements 22, the LD chip 20 of the technology of the present disclosure may have one light emitting element 22.
- the technology of the present disclosure is suitable for application to the LD chip 20 having a plurality of light emitting elements 22. Therefore, it is preferable that the LD chip 20 has a plurality of light emitting elements 22 distributed on the substrate 21.
- the structure 23 is disposed on the first surface S1 of the substrate 21 in the inter-element region of the light emitting elements 22 arranged in a dispersed manner.
- the inter-element region refers to the region between the plurality of light emitting elements 22.
- the inter-element area refers to an area other than the area where the light emitting element 22 is arranged.
- the structure 23 is composed of the same multilayer film 22L as the light emitting element 22.
- the structure 23 reinforces the strength of the LD chip 20. That is, the structure 23 has the same multilayer film 22L as the light emitting element 22. Furthermore, the structure 23 makes the volume of the insulating film 24 smaller than that in the case where the structure 23 does not exist.
- the height H2 of the top of the structure 23 is lower than the height H1 of the top of the individual electrode 25. This is because the structure 23 of the LD chip 20 is covered with the insulating film 24.
- the gap 27 is arranged so as to surround the outer periphery of each light emitting element 22 when viewed from the normal direction of the substrate 21. That is, the gap 27 has an annular shape when observed from the normal direction of the substrate 21. Further, the bottom surface of the gap portion 27 is the first surface S1 of the substrate 21.
- the insulating film 24 is laminated on the first surface S1 of the substrate 21 so as to fill the gap 27 between the light emitting element 22 and the structure 23. Further, the insulating film 24 is laminated so that among the light emitting elements 22, the structure 23, the individual electrodes 25, and the common electrode 26, only the individual electrodes 25 and the common electrode 26 are exposed to the outside. Due to the presence of the above-described structure 23, the volume of the insulating film 24 is kept small. The insulating film 24 suppresses the generation of noise in the light emitting element 22 and, in turn, improves the reliability of the light emitting device 10.
- the insulating film 24 only needs to fill the gap 27 between the light emitting element 22 and the structure 23, and a part of the light emitting element 22 and the structure 23 may not be exposed to the outside from the insulating film 24. Good too. However, from the viewpoint of suppressing noise generation in the light emitting element 22, it is preferable that only the individual electrodes 25 and the common electrode 26 are exposed to the outside from the insulating film 24.
- the insulating film 24 is made of a material that has insulating properties and can be polished by CMP (Chemical Mechanical Polishing). By forming the insulating film 24 from an inorganic material, the strength of the LD chip 20 can be further reinforced. Furthermore, by forming the insulating film 24 from an inorganic material, it is possible to suppress the occurrence of warping of the LD chip 20 in a high-temperature environment. Therefore, the insulating film 24 is preferably made of an inorganic material, and more preferably made of SiO 2 or SiN.
- the individual electrodes 25 are arranged on top of each light emitting element 22. Individual electrodes 25 are configured as electrode pads. The individual electrodes 25 are bonded to the electrode pads 32 of the LDD substrate 30 by direct bonding such as thermocompression bonding. The individual electrodes 25 are made of a material suitable for direct bonding such as thermocompression bonding. The individual electrodes 25 are preferably made of a metal material, more preferably Cu or Au. In this specification, the individual electrodes 25 are sometimes referred to as "first electrode pads.”
- the common electrode 26 is disposed from the structure 23 disposed near the end of the LD chip 20 to the first surface S1 of the substrate 21, and is electrically connected to the substrate 21. A portion of the common electrode 26 on the structure 23 is configured as an electrode pad.
- the electrode pad of the common electrode 26 is bonded to the electrode pad 32 of the LDD substrate 30 by direct bonding such as thermocompression bonding.
- the common electrode 26 is made of a material suitable for direct bonding such as thermocompression bonding.
- the common electrode 26 is preferably made of a metal material, more preferably Cu or Au.
- the lens portion 21a is provided in a region overlapping with the light emitting element 22 on the second surface S2 side of the substrate 21.
- the lens portion 21a condenses the laser light emitted from the light emitting element 22.
- the LDD substrate 30 includes a substrate 31 and a plurality of electrode pads 32 distributed on the substrate 31.
- the electrode pad 32 supplies a drive signal to the light emitting element 22 of the LD chip 20.
- the electrode pads 32 of the LDD substrate 30 are bonded to the individual electrodes 25 and the common electrode 26 of the LD chip 20 by direct bonding such as thermocompression bonding.
- the electrode pad 32 is made of a material suitable for direct bonding such as thermocompression bonding.
- the electrode pad 32 is preferably made of a metal material, more preferably Cu or Au.
- the LDD substrate 30 is sometimes called a "second base"
- the substrate 31 is sometimes called a "second substrate”
- the electrode pad 32 is sometimes called a "second electrode pad”.
- the LD chip 20 and the LDD substrate 30 may be joined through a joining member such as solder instead of being directly joined.
- the light emitting device 10 in which the LD chip 20 and the LDD substrate 30 are directly bonded has better flatness. Therefore, it is preferable that the LD chip 20 and the LDD substrate 30 be bonded directly.
- the LDD board 30 may have a drive circuit that generates a drive signal. In this case, the LDD substrate 30 performs active driving. Alternatively, the LDD substrate 30 may supply the electrode pads 32 with a voltage according to a drive signal generated by an external drive circuit. In this case, the LDD board 30 performs passive driving.
- the space between the LD chip 20 and the LDD substrate 30 may be filled with underfill. That is, the light emitting device 10 may have an underfill layer between the LD chip 20 and the LDD substrate 30.
- FIG. 4 is a front view showing the configuration of the LD chip 20 in the light emitting device 10 of the first embodiment.
- FIG. 5 is a longitudinal cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the first embodiment, and shows a cross section taken along line CC in FIG. 6A to 6C are vertical cross-sectional views schematically showing a method for manufacturing the light emitting device 10 of the first embodiment.
- FIGS. 4 and 5 show the LD chip 20 before being bonded to the LDD substrate 30.
- the first surface S1 side of the LD chip 20 is covered with an insulating film 24. Only the common electrode 26 is exposed to the outside. With this configuration, the generation of noise in the light emitting element 22 is further suppressed, and the light emitting device 10 becomes more reliable.
- the outline of the method for manufacturing the light emitting device 10 using such an LD chip 20 is as follows.
- the individual electrodes 25 and common electrodes 26 of the LD chip 20 and the electrode pads 32 of the LDD substrate 30 are connected by direct bonding such as thermocompression bonding.
- the LD chip 20 is manufactured by reducing the thickness of the substrate 21 and further forming a lens portion 21a.
- the strength of the LD chip 20 is reinforced by the presence of the structure 23 and the insulating film 24. Further, in the LD chip 20, the volume of the insulating film 24 is kept small due to the presence of the structure 23. Therefore, the LD chip 20 is prevented from warping even in a high-temperature environment, and can maintain a flat bonding surface.
- the LD chip 20 can maintain a flat bonding surface, the individual electrodes 25 and common electrodes 26 of the LD chip 20 and the electrode pads 32 of the LDD substrate 30 are bonded directly by thermocompression bonding or the like. It is possible to join by joining. Furthermore, since the strength of the LD chip 20 is reinforced and the LD chip 20 can maintain a flat bonding surface, after the LD chip 20 is bonded to the LDD substrate 30, the thickness of the substrate 21 of the LD chip 20 is reduced by polishing with CMP. It is possible to reduce the thickness and further form the lens portion 21a on the second surface S2 of the substrate 21. Therefore, better flatness can be achieved compared to the conventional light emitting device 10.
- the disclosers of the present disclosure will explain how they came up with the idea of the light emitting devices 10 of the embodiments of the present disclosure, including the light emitting device 10 of the first embodiment. explain.
- FIG. 7 is a longitudinal cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of a comparative example.
- 8A and 8B are vertical cross-sectional views schematically showing a method for manufacturing a light emitting device 10 of a comparative example.
- the disclosers of the present disclosure have developed a method for forming a plurality of LD chips as shown in FIG. It was considered to embed an insulating resin such as polyimide in the inter-element region of the light-emitting element 22.
- the disclosers of the present disclosure found that even with such an LD chip 20, the expected effects could not be obtained. Furthermore, the disclosers of the present disclosure believe that the reason is that, as shown in FIGS. 8A and 8B, when the LD chip 20 is connected to the LDD substrate 30 in a high temperature environment, the thermal expansion coefficient of the resin and the substrate 21 is It has been found that this is due to the fact that a slight warp occurs in the LD chip 20 due to the difference in the temperature. Note that in FIG. 8A, the magnitude of the warpage of the LD chip 20 is exaggerated.
- the light emitting device 10 of the embodiment of the present disclosure which was conceived through these circumstances, has the substrate 21 of the LD chip 20 having good flatness and excellent reliability compared to the conventional light emitting device 10. It becomes.
- the light emitting device 10 of the first embodiment includes the LD chip 20 (first base), and the LD chip 20 (first base) includes a substrate 21 (first substrate) and a substrate 21 (first substrate).
- the light-emitting device 22 has a multilayer film 22L, and a structure 23 is provided in an inter-element region of the light-emitting devices 22 on the first surface S1.
- the structure 23 has the same multilayer film 22L as the light emitting element 22.
- the LD chip 20 (first base) has good flatness and is excellent in reliability.
- the common electrode 26 is omitted for convenience of explanation.
- the common electrode 26 can be formed by appropriately applying a known technique.
- FIGS. 9A to 9L are longitudinal cross-sectional views showing an example of a method for manufacturing the light emitting device 10 of the first embodiment.
- a multilayer film 22L constituting the light emitting element 22 is formed on the first surface S1 of the substrate 21.
- the substrate 21 is a substrate made of a compound semiconductor such as GaAs.
- the multilayer film 22A is formed by sequentially stacking a first mirror layer 221, a first spacer layer 222, an active layer 223, a second spacer layer 224, and a second mirror layer 225 (see FIG. 3) from the substrate 21 side. . Formation of the multilayer film 22L can be realized using, for example, epitaxial growth technology.
- individual electrodes 25 are formed on the multilayer film 22L in regions where the light emitting elements 22 are to be formed.
- the individual electrodes 25 are made of a material suitable for direct bonding such as thermocompression bonding.
- the individual electrodes 25 are preferably made of a metal material, more preferably Cu or Au.
- the formation of the individual electrodes 25 can be realized, for example, by sequentially applying a resist, depositing a metal, and removing the resist.
- the multilayer film 22L in the region where the gap 27 between the light emitting element 22 and the structure 23 is formed is removed, thereby forming the light emitting element 22 and the structure 23.
- a resist 91 is applied to an area other than the area where the gap 27 on the multilayer film 22L and the individual electrode 25 is formed.
- the multilayer film 22L in the region where the gap 27 is to be formed is removed by etching, and the resist 91 is also removed.
- an insulating film 24 is laminated on the first surface S1 of the substrate 21.
- the insulating film 24 is stacked so as to fill the gap 27 between the light emitting element 22 and the structure 23.
- the insulating film 24 is preferably made of an inorganic material such as SiO 2 or SiN.
- Lamination of the insulating film 24 can be realized by, for example, an ALD (Atomic Layer Deposition) method or a CVD (Chemical Vapor Deposition) method.
- the insulating film 24 is polished by CMP (Chemical Mechanical Polishing) to expose the individual electrodes 25. Thereby, an LD chip 20 connectable to the LDD substrate 30 is obtained.
- CMP Chemical Mechanical Polishing
- the LD chip 20 obtained through the above steps is bonded to the LDD substrate 30.
- the individual electrodes 25 of the LD chip 20 are directly bonded to the electrode pads 32 of the LDD substrate 30 by thermocompression bonding or the like. Note that after this, the space between the LD chip 20 and the LDD substrate 30 may be filled with underfill.
- the thickness of the substrate 21 of the LD chip 20 is reduced by polishing the second surface S2 side of the substrate 21 of the LD chip 20 by CMP (Chemical Mechanical Polishing).
- a lens portion 21a is formed on the second surface S2 of the substrate 21 of the LD chip 20.
- a resist 91 is applied to a region on the second surface S2 of the substrate 21 where the lens portion 21a is to be formed.
- the lens portion 21a is formed by reducing the thickness of the substrate 21 in areas other than the region where the lens portion 21a is formed by etching, and the resist 91 is also removed.
- the light emitting device 10 having the LD chip 20 and the LDD substrate 30 is usually separated into pieces with a plurality of light emitting elements 22 as a unit. Through the above steps, the light emitting device 10 of the first embodiment is manufactured.
- the method for manufacturing the light emitting device 10 of the first embodiment includes a first step of manufacturing the above-described LD chip 20 (first substrate), a substrate 31 (second substrate), and a substrate 31 (second substrate).
- the individual electrodes 25 of the LD chip 20 (first base) are attached to the electrode pads 32 (second electrode pads) of the LDD substrate 30 (second base) having the electrode pads 32 (second electrode pads) disposed above. (first electrode pad); and a third step of thinning the substrate 21 (first substrate) of the LD chip 20 (first base) from the second surface S2 side.
- the light emitting device 10 having good flatness and excellent reliability can be manufactured.
- the light emitting devices 10 of the second to seventh embodiments will be described. These embodiments will be described with a focus on differences from the first embodiment, and descriptions of common features with the first embodiment will be omitted as appropriate.
- FIG. 10 is a longitudinal cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the second embodiment.
- FIG. 11 is a cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the second embodiment, and shows a cross section taken along line DD in FIG.
- the light emitting device 10 of the second embodiment is different from the light emitting device 10 of the first embodiment in that the structures 23 and 21 of the LD chip 20 are made of the same material as the substrate 21.
- the structures 23, 21 and the substrate 21 are integrally configured.
- the structures 23 and 21 do not need to be configured integrally with the substrate 21.
- the other configuration of the second embodiment is the same as the light emitting device 10 of the first embodiment.
- the light emitting device 10 of the second embodiment is different from the light emitting device 10 of the first embodiment because the structures 23 and 21 of the LD chip 20 are made of the same material as the substrate 21. The strength is further reinforced, and the occurrence of warping of the LD chip 20 is further suppressed.
- 12A to 12E are longitudinal cross-sectional views showing an example of a method for manufacturing the light emitting device 10 of the second embodiment.
- a region other than the region that will become the structure 23 on the first surface S1 of the substrate 21 of the LD chip 20 is dug to a certain depth.
- the vertical hole portion 21H and the structures 23 and 21 are formed by inserting the holes.
- the substrate 21 is a substrate made of a compound semiconductor such as GaAs.
- the formation of the vertical hole portion 21H can be realized, for example, by sequentially forming a hard mask, dry etching, and removing the hard mask.
- a multilayer film 22L that constitutes the light emitting element 22 is formed inside the vertical hole portion 21H.
- the multilayer film 22A is formed by sequentially stacking a first mirror layer 221, a first spacer layer 222, an active layer 223, a second spacer layer 224, and a second mirror layer 225 (see FIG. 3) from the substrate 21 side.
- Formation of the multilayer film 22L can be realized using, for example, epitaxial growth technology.
- individual electrodes 25 are formed on the multilayer film 22L in regions where the light emitting elements 22 are to be formed.
- the individual electrodes 25 are made of a material suitable for direct bonding such as thermocompression bonding.
- the individual electrodes 25 are preferably made of a metal material, more preferably Cu or Au.
- the formation of the individual electrodes 25 can be realized, for example, by sequentially applying a resist, depositing a metal, and removing the resist.
- the light emitting element 22 and the structures 23, 21 are removed. 21 is formed.
- the subsequent steps are the same as the method for manufacturing the light emitting device 10 of the first embodiment shown in FIGS. 9E to 9L. Through the above steps, the light emitting device 10 of the second embodiment is manufactured.
- FIG. 13 is a longitudinal cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the third embodiment.
- FIG. 14 is a cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the third embodiment, and shows a cross section taken along line EE in FIG.
- the common electrode 26 of the LD chip 20 in the light emitting device 10 of the first embodiment is connected to the common electrode 26 of the substrate 21, which is the bottom surface of the gap 27 between each light emitting element 22 and the structure 23. It is extended to the top of one side S1. That is, the LD chip 30 in the light emitting device 10 of the third embodiment has the common electrode 26 extended to the first surface S1 of the substrate 21, which is the bottom surface of the gap 27 between the light emitting element 22 and the structure 23.
- a connecting portion 27C is provided to connect adjacent gaps 27. Then, an elongated common electrode is arranged on the first surface S1 of the substrate 21, which is the bottom surface of the gap 27 and the connection section 27C.
- the other configurations of the light emitting device 10 of the third embodiment are the same as the light emitting device 10 of the first embodiment.
- the light emitting device 10 of the third embodiment is more precise than the light emitting device 10 of the first embodiment because the common electrode 25 is connected to the substrate 21 near the outer periphery of each light emitting element 22. This allows stable control of the light emitting element 22.
- the light emitting device 10 of the third embodiment can be manufactured by the same method as the light emitting device 10 of the first embodiment. However, in manufacturing the light emitting device 10 of the third embodiment, in the step of removing the multilayer film 22L in the region where the gap portion 27 shown in FIGS. 9C and 9D is formed, the multilayer film 22L in the region where the connection portion 27C is formed is removed. The film 22L will also be removed. Furthermore, before the step of laminating the insulating film 24 shown in FIG. 9E, a step of laminating the common electrode 26 is added on the first surface S1 of the substrate 21, which becomes the bottom surface of the gap portion 27 and the connecting portion 27C. .
- FIG. 15 is a longitudinal cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the fourth embodiment.
- FIG. 16 is a cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the fourth embodiment, and shows the FF cross section in FIG.
- the common electrode 26 of the LD chip 20 in the light emitting device 10 of the second embodiment is connected to a substrate 21 that serves as the bottom surface of the gap 27 between each light emitting element 22 and the structures 23 and 21.
- the image is expanded to the first surface S1 of the image. That is, the LD chip 30 in the light emitting device 10 of the fourth embodiment has the common electrode 26 drawn up to the first surface S1 of the substrate 21, which is the bottom surface of the gap 27 between the light emitting element 22 and the structures 23 and 21.
- a connecting portion 27C is provided to connect adjacent gaps 27 to each other. Then, an elongated common electrode is arranged on the first surface S1 of the substrate 21, which is the bottom surface of the gap 27 and the connection section 27C.
- the other configurations of the light emitting device 10 of the third embodiment are the same as the light emitting device 10 of the first embodiment.
- the light emitting device 10 of the fourth embodiment is more precise than the light emitting device 10 of the second embodiment because the common electrode 25 is connected to the substrate 21 near the outer periphery of each light emitting element 22. This allows stable control of the light emitting element 22.
- the light emitting device 10 of the fourth embodiment can be manufactured by the same method as the light emitting device 10 of the second embodiment. However, in manufacturing the light emitting device 10 of the fourth embodiment, in the step of forming the vertical hole 21H and the structures 23, 21 shown in FIG. 12A, the vertical hole 21H is also formed in the region where the connecting portion 27C is formed. . Furthermore, in the step of removing the multilayer film 22L in the region where the gap portion 27 is formed as shown in FIGS. 12D and 12E, the multilayer film 22L in the region where the connection portion 27C is formed is also removed. Furthermore, before the subsequent step of laminating the insulating film 24 (see FIG. 9E), a step of laminating the common electrode 26 on the first surface S1 of the substrate 21, which becomes the bottom surface of the gap portion 27 and the connecting portion 27C, is added. become.
- FIG. 17 is a front view showing the configuration of the LD chip 20 in the light emitting device 10 of the fifth embodiment.
- FIG. 18 is a vertical cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the fifth embodiment, and shows a cross section taken along line GG in FIG.
- FIG. 19 is a cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the fifth embodiment, and shows a cross section taken along the line HH in FIG. 18.
- the light emitting device 10 of the fifth embodiment has, in addition to the configuration of the light emitting device 10 of the first embodiment, the LD chip 20 has a dummy electrode pad 25D arranged on the top of the structure 23.
- the dummy electrode pad 25D is made of the same material as the individual electrode 25. Further, the height H3 of the top of the dummy electrode pad 25D is the same as the height H1 of the top of the individual electrode. Further, like the individual electrodes 25, the dummy electrode pads 25D are exposed to the outside from the insulating film 24. However, unlike the individual electrodes 25, the dummy electrode pads 25D are not bonded to the electrode pads 32 of the LDD substrate 30 and are not supplied with drive signals from the LDD substrate 30.
- the other configurations of the light emitting device 10 of the fifth embodiment are the same as the light emitting device 10 of the first embodiment.
- the light emitting device 10 of the fifth embodiment is different from the light emitting device 10 of the first embodiment because the in-plane uniformity on the first surface S1 side of the substrate 21 of the LD chip 20 is improved due to the presence of the dummy electrode pad 25D. In comparison, the bonding between the LD chip 20 and the LDD substrate 30 is better.
- the light emitting device 10 of the fifth embodiment can be manufactured by the same method as the light emitting device 10 of the first embodiment. However, in manufacturing the light emitting device 10 of the fifth embodiment, in the step of forming the individual electrodes 25 shown in FIG. 9B, dummy electrode pads 25D are simultaneously formed in the region on the multilayer film 22L where the structure 23 is to be formed. do. Furthermore, in the step shown in FIG. 9F in which the individual electrodes 25 are exposed by polishing the insulating film 24 by CMP, the dummy electrode pads 25D are also exposed at the same time.
- FIG. 20 is a longitudinal cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the sixth embodiment.
- FIG. 21 is a cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the sixth embodiment, and shows the II cross section in FIG. 20.
- the light emitting device 10 of the sixth embodiment has the LD chip 20 having dummy electrode pads 25D arranged on the tops of the structures 23 and 21. .
- the dummy electrode pad 25D is made of the same material as the individual electrode 25. Further, the height H3 of the top of the dummy electrode pad 25D is the same as the height H1 of the top of the individual electrode. Further, like the individual electrodes 25, the dummy electrode pads 25D are exposed to the outside from the insulating film 24. However, unlike the individual electrodes 25, the dummy electrode pads 25D are not bonded to the electrode pads 32 of the LDD substrate 30 and are not supplied with drive signals from the LDD substrate 30.
- the other configurations of the light emitting device 10 of the sixth embodiment are the same as the light emitting device 10 of the second embodiment.
- the light emitting device 10 of the fifth embodiment improves in-plane uniformity on the first surface S1 side of the LD chip 20 due to the presence of the dummy electrode pad 25D, compared to the light emitting device 10 of the second embodiment. , the bonding between the LD chip 20 and the LDD substrate 30 becomes better.
- the light emitting device 10 of the sixth embodiment can be manufactured by the same method as the light emitting device 10 of the second embodiment.
- dummy electrode pads 25D are formed on the structures 23 and 21 at the same time in the step of forming the individual electrodes 25 shown in FIG. 12C.
- the dummy electrode pads 25D are also exposed at the same time.
- FIG. 22 is a longitudinal cross-sectional view showing the configuration of the LD chip 20 in the light emitting device 10 of the seventh embodiment.
- the light emitting device 10 of the seventh embodiment includes only the LD chip 20. In this point, the light emitting device 10 of the seventh embodiment is different from the light emitting device 10 of the first embodiment, which includes the LDD substrate 30 to which the LD chip 20 is bonded.
- the configuration of the LD chip 20 of the light emitting device 10 of the seventh embodiment is the same as that of the LD chip 20 of the light emitting device 10 of the first embodiment shown in FIG.
- the substrate 21 of the LD chip 20 has good flatness and is highly reliable.
- this light emitting device 10 suppresses the occurrence of warpage when bonded to the LDD substrate 30, maintains good flatness even after bonding to the LDD substrate, and has excellent reliability. It becomes something.
- FIGS. 23A to 23G are longitudinal cross-sectional views showing an example of a method for manufacturing the light emitting device 10 of the seventh embodiment.
- the method of manufacturing the light emitting device 10 of the seventh embodiment is the same as the method of manufacturing the light emitting device 10 of the first embodiment shown in FIGS. 9A to 9F until the LD chip 20 connectable to the LDD substrate 30 is obtained. .
- the LD chip 20 is attached to the temporary substrate 92 as shown in FIGS. 23A and 23B.
- the individual electrode 25 side of the LD chip 20 is attached to the temporary substrate 92.
- the temporary substrate 92 has an adhesive layer 92a for holding the LD chip 20.
- the adhesive layer 92a is made of, for example, a material whose adhesive strength decreases when heated.
- the lens portion 21a is formed on the substrate 21. This step is the same as the method for manufacturing the light emitting device 10 of the first embodiment shown in FIGS. 9H to 9K.
- the LD chip 20 attached to the temporary substrate 92 is attached to the mounting sheet 93.
- the lens portion 21a side of the LD chip 20 is attached to the mount sheet 93.
- the temporary substrate 92 is removed from the LD chip 20. If the adhesive layer 92a of the temporary substrate 92 is made of a material whose adhesive strength decreases when heated, the temporary substrate 92 can be removed from the LD chip 20 by heating the adhesive layer 92a.
- the LD chip 20 is usually divided into individual pieces with a plurality of light emitting elements 22 as a unit. Through the above steps, the light emitting device 10 of the seventh embodiment is manufactured.
- the light emitting device 10 can be used, for example, in a distance measuring device (also referred to as a distance measuring module) 40 that measures the distance to an object in a non-contact manner.
- a distance measuring device also referred to as a distance measuring module 40 that measures the distance to an object in a non-contact manner.
- FIG. 24 is a block diagram illustrating a configuration example of a distance measuring device 40 as an example of implementing the light emitting device 10 according to the embodiment of the present disclosure.
- the distance measuring device 40 includes a light emitting section 51, a driving section 52, a power supply circuit 53, a light emitting side optical system 54, a light receiving side optical system 55, a light receiving section 56, a signal processing section 57, a control section 58, and a temperature detection section. 59.
- the light emitting unit 51 emits light using a plurality of light sources.
- the light emitting unit 51 of this example has a light emitting element using a VCSEL (Vertical Cavity Surface Emitting Laser) as each light source, and these light emitting elements are arranged in a predetermined manner, such as a matrix. It is arranged and configured according to the aspect.
- VCSEL Vertical Cavity Surface Emitting Laser
- the driving section 52 is configured to include a power supply circuit 53 for driving the light emitting section 51.
- the power supply circuit 53 generates a power supply voltage (a drive voltage Vd, which will be described later) for the drive unit 52, based on an input voltage (an input voltage Vin, which will be described later) from, for example, a battery (not shown) provided in the distance measuring device 40.
- the driving section 52 drives the light emitting section 51 based on the power supply voltage.
- the light emitted from the light emitting unit 51 is irradiated onto the subject (object) S as a distance measurement target via the light emitting side optical system 54. Then, the reflected light from the subject S of the light irradiated in this way enters the light receiving surface of the light receiving section 56 via the light receiving side optical system 55.
- the light receiving unit 56 is, for example, a light receiving element such as a CCD (Charge Coupled Device) sensor or a CMOS (Complementary Metal Oxide Semiconductor) sensor, and receives reflected light from the subject S that enters through the light receiving side optical system 55 as described above. It receives light, converts it into an electrical signal, and outputs it.
- a light receiving element such as a CCD (Charge Coupled Device) sensor or a CMOS (Complementary Metal Oxide Semiconductor) sensor
- the light receiving unit 56 performs, for example, CDS (Correlated Double Sampling) processing, AGC (Automatic Gain Control) processing, etc. on the electrical signal obtained by photoelectrically converting the received light, and further performs A/D (Analog/Digital) conversion. Perform processing. Then, the signal as digital data is output to the signal processing section 57 at the subsequent stage.
- CDS Correlated Double Sampling
- AGC Automatic Gain Control
- the light receiving section 56 of this example outputs a frame synchronization signal Fs to the driving section 52. This allows the driving section 52 to cause the light emitting element 22 in the light emitting section 51 to emit light at a timing corresponding to the frame period of the light receiving section 56.
- the signal processing unit 57 is configured as a signal processing processor using, for example, a DSP (Digital Signal Processor).
- the signal processing unit 57 performs various signal processing on the digital signal input from the light receiving unit 56.
- the control unit 58 includes, for example, a microcomputer having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), or an information processing device such as a DSP, and controls the light emission by the light emitting unit 51. It controls the driving section 52 for controlling the operation and controls the light receiving operation of the light receiving section 56.
- a microcomputer having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), or an information processing device such as a DSP, and controls the light emission by the light emitting unit 51. It controls the driving section 52 for controlling the operation and controls the light receiving operation of the light receiving section 56.
- the control section 58 has a function as a distance measuring section 58a.
- the distance measuring section 58a measures the distance to the subject S based on a signal input via the signal processing section 57 (that is, a signal obtained by receiving reflected light from the subject S).
- the distance measuring unit 58a of this example measures distances for each part of the subject S to enable identification of the three-dimensional shape of the subject S.
- the temperature detection section 59 detects the temperature of the light emitting section 51.
- a configuration may be adopted in which temperature detection is performed using, for example, a diode.
- information on the temperature detected by the temperature detection section 59 is supplied to the driving section 52, thereby enabling the driving section 52 to drive the light emitting section 51 based on the temperature information.
- the distance measurement method in the distance measurement device 40 for example, a distance measurement method using an STL (Structured Light) method or a ToF (Time of Flight) method can be adopted.
- STL Structured Light
- ToF Time of Flight
- the STL method is a method for measuring distance based on an image of a subject S irradiated with light having a predetermined bright/dark pattern, such as a dot pattern or a grid pattern.
- FIG. 25A is an explanatory diagram of the STL method.
- the subject S is irradiated with patterned light Lp having a dot pattern as shown in FIG. 25A, for example.
- the patterned light Lp is divided into a plurality of blocks BL, and each block BL is assigned a different dot pattern (dot patterns are prevented from overlapping between blocks B).
- FIG. 25B is an explanatory diagram of the distance measurement principle of the STL method.
- an example is taken in which a wall W and a box BX placed in front of the wall W are the subject S, and the subject S is irradiated with the pattern light Lp.
- “G” in the figure schematically represents the angle of view by the light receiving section 56.
- BLn in the figure means the light of a certain block BL in the pattern light Lp
- dn means the dot pattern of the block BLn projected on the light reception image by the light receiving unit 56.
- the dot pattern of the block BLn is projected at the position "dn'" in the figure in the received light image. That is, the position where the pattern of the block BLn is projected in the received light image is different depending on whether the box BX exists or the box BX does not exist, and specifically, distortion of the pattern occurs.
- the STL method is a method for determining the shape and depth of the subject S by utilizing the fact that the irradiated pattern is distorted by the object shape of the subject S. Specifically, this method calculates the shape and depth of the subject S from the way the pattern is distorted.
- the light receiving section 56 is, for example, an IR (Infrared) light receiving section using a global shutter method.
- the distance measuring section 58a controls the driving section 52 so that the light emitting section 51 emits pattern light, and detects pattern distortion in the image signal obtained via the signal processing section 57. , calculate the distance based on how the pattern is distorted.
- the ToF method measures the distance to the target object by detecting the flight time (time difference) of the light emitted from the light emitting unit 51 until it is reflected by the target object and reaches the light receiving unit 56. This is a method to do so.
- a so-called direct ToF (dTOF) method is adopted as the ToF method
- a SPAD Single Photon Avalanche Diode
- the distance measuring section 58a calculates the time difference between light emission and light reception for the light emitted from the light emitting section 51 and received by the light receiving section 56 based on the signal inputted via the signal processing section 57, and calculates the time difference between light emission and light reception.
- the distance to each part of the subject S is calculated based on the distance and the speed of light.
- a light receiving portion capable of receiving IR light is used as the light receiving portion 56, for example.
- the light emitting device 10 according to the embodiment of the present disclosure can be applied to the light emitting section 51 and the light emitting side optical system 54 among the configurations described above. Specifically, the light emitting device 10 according to the embodiment of the present disclosure, the light receiving section 56, and the light emitting signal of the light emitting device 10 when the light emitting signal of the light emitting device 10 is reflected by an object and received by the light receiving section 56.
- the distance measuring device 40 can be configured to include a distance measuring section (distance measuring section 58a) that measures the distance to the target object based on the light receiving signal of the light receiving section 56.
- the technology according to the present disclosure can be applied to various products.
- the technology according to the present disclosure may be realized as a device mounted on any type of moving body such as a car, electric vehicle, hybrid electric vehicle, motorcycle, bicycle, personal mobility, airplane, drone, ship, robot, etc. It's okay.
- FIG. 26 is a block diagram showing a schematic configuration example of a vehicle control system 12000, which is an example of a mobile object control system to which the technology according to the present disclosure can be applied.
- the vehicle control system 12000 includes a plurality of electronic control units connected via a communication network 12001.
- the vehicle control system 12000 includes a drive system control unit 12010, a body system control unit 12020, an outside vehicle information detection unit 12030, an inside vehicle information detection unit 12040, and an integrated control unit 12050.
- a microcomputer 12051, an audio/image output section 12052, and an in-vehicle network I/F (Interface) 12053 are illustrated as the functional configuration of the integrated control unit 12050.
- the drive system control unit 12010 controls the operation of devices related to the drive system of the vehicle according to various programs.
- the drive system control unit 12010 includes a drive force generation device such as an internal combustion engine or a drive motor that generates drive force for the vehicle, a drive force transmission mechanism that transmits the drive force to wheels, and a drive force transmission mechanism that controls the steering angle of the vehicle. It functions as a control device for a steering mechanism to adjust and a braking device to generate braking force for the vehicle.
- the body system control unit 12020 controls the operations of various devices installed in the vehicle body according to various programs.
- the body system control unit 12020 functions as a keyless entry system, a smart key system, a power window device, or a control device for various lamps such as a headlamp, a back lamp, a brake lamp, a turn signal, or a fog lamp.
- radio waves transmitted from a portable device that replaces a key or signals from various switches may be input to the body control unit 12020.
- the body system control unit 12020 receives input of these radio waves or signals, and controls the door lock device, power window device, lamp, etc. of the vehicle.
- the external information detection unit 12030 detects information external to the vehicle in which the vehicle control system 12000 is mounted.
- an imaging section 12031 is connected to the outside-vehicle information detection unit 12030.
- the vehicle exterior information detection unit 12030 causes the imaging unit 12031 to capture an image of the exterior of the vehicle, and receives the captured image.
- the external information detection unit 12030 may perform object detection processing such as a person, car, obstacle, sign, or text on the road surface or distance detection processing based on the received image.
- the imaging unit 12031 is an optical sensor that receives light and outputs an electrical signal according to the amount of received light.
- the imaging unit 12031 can output the electrical signal as an image or as distance measurement information.
- the light received by the imaging unit 12031 may be visible light or non-visible light such as infrared rays.
- the in-vehicle information detection unit 12040 detects in-vehicle information.
- a driver condition detection section 12041 that detects the condition of the driver is connected to the in-vehicle information detection unit 12040.
- the driver condition detection unit 12041 includes, for example, a camera that images the driver, and the in-vehicle information detection unit 12040 detects the degree of fatigue or concentration of the driver based on the detection information input from the driver condition detection unit 12041. It may be calculated, or it may be determined whether the driver is falling asleep.
- the microcomputer 12051 calculates control target values for the driving force generation device, steering mechanism, or braking device based on the information inside and outside the vehicle acquired by the vehicle exterior information detection unit 12030 or the vehicle interior information detection unit 12040, Control commands can be output to 12010.
- the microcomputer 12051 realizes ADAS (Advanced Driver Assistance System) functions, including vehicle collision avoidance or impact mitigation, following distance based on vehicle distance, vehicle speed maintenance, vehicle collision warning, vehicle lane departure warning, etc. It is possible to perform cooperative control for the purpose of ADAS (Advanced Driver Assistance System) functions, including vehicle collision avoidance or impact mitigation, following distance based on vehicle distance, vehicle speed maintenance, vehicle collision warning, vehicle lane departure warning, etc. It is possible to perform cooperative control for the purpose of
- ADAS Advanced Driver Assistance System
- the microcomputer 12051 controls the driving force generating device, steering mechanism, braking device, etc. based on information about the surroundings of the vehicle acquired by the vehicle exterior information detection unit 12030 or the vehicle interior information detection unit 12040. It is possible to perform cooperative control for the purpose of autonomous driving, etc., which does not rely on operation.
- the microcomputer 12051 can output a control command to the body system control unit 12020 based on the information outside the vehicle acquired by the outside information detection unit 12030.
- the microcomputer 12051 controls the headlamps according to the position of the preceding vehicle or oncoming vehicle detected by the vehicle exterior information detection unit 12030, and performs cooperative control for the purpose of preventing glare, such as switching from high beam to low beam. It can be carried out.
- the audio and image output unit 12052 transmits an output signal of at least one of audio and images to an output device that can visually or audibly notify information to the occupants of the vehicle or to the outside of the vehicle.
- an audio speaker 12061, a display section 12062, and an instrument panel 12063 are illustrated as output devices.
- the display unit 12062 may include, for example, at least one of an on-board display and a head-up display.
- FIG. 27 is a diagram showing an example of the installation position of the imaging section 12031.
- the imaging unit 12031 includes imaging units 12101, 12102, 12103, 12104, and 12105.
- the imaging units 12101, 12102, 12103, 12104, and 12105 are provided at, for example, the front nose of the vehicle 12100, the side mirrors, the rear bumper, the back door, and the upper part of the windshield inside the vehicle.
- An imaging unit 12101 provided in the front nose and an imaging unit 12105 provided above the windshield inside the vehicle mainly acquire images in front of the vehicle 12100.
- Imaging units 12102 and 12103 provided in the side mirrors mainly capture images of the sides of the vehicle 12100.
- An imaging unit 12104 provided in the rear bumper or back door mainly captures images of the rear of the vehicle 12100.
- the imaging unit 12105 provided above the windshield inside the vehicle is mainly used to detect preceding vehicles, pedestrians, obstacles, traffic lights, traffic signs, lanes, and the like.
- FIG. 27 shows an example of the imaging range of the imaging units 12101 to 12104.
- An imaging range 12111 indicates the imaging range of the imaging unit 12101 provided on the front nose
- imaging ranges 12112 and 12113 indicate imaging ranges of the imaging units 12102 and 12103 provided on the side mirrors, respectively
- an imaging range 12114 shows the imaging range of the imaging unit 12101 provided on the front nose.
- the imaging range of the imaging unit 12104 provided in the rear bumper or back door is shown. For example, by overlapping the image data captured by the imaging units 12101 to 12104, an overhead image of the vehicle 12100 viewed from above can be obtained.
- At least one of the imaging units 12101 to 12104 may have a function of acquiring distance information.
- at least one of the imaging units 12101 to 12104 may be a stereo camera including a plurality of image sensors, or may be an image sensor having pixels for phase difference detection.
- the microcomputer 12051 determines the distance to each three-dimensional object within the imaging ranges 12111 to 12114 and the temporal change in this distance (relative speed with respect to the vehicle 12100) based on the distance information obtained from the imaging units 12101 to 12104. In particular, by determining the three-dimensional object that is closest to the vehicle 12100 on its path and that is traveling at a predetermined speed (for example, 0 km/h or more) in approximately the same direction as the vehicle 12100, it is possible to extract the three-dimensional object as the preceding vehicle. can.
- a predetermined speed for example, 0 km/h or more
- the microcomputer 12051 can set an inter-vehicle distance to be secured in advance in front of the preceding vehicle, and perform automatic brake control (including follow-up stop control), automatic acceleration control (including follow-up start control), and the like. In this way, it is possible to perform cooperative control for the purpose of autonomous driving, etc., in which the vehicle travels autonomously without depending on the driver's operation.
- the microcomputer 12051 transfers three-dimensional object data to other three-dimensional objects such as two-wheeled vehicles, regular vehicles, large vehicles, pedestrians, and utility poles based on the distance information obtained from the imaging units 12101 to 12104. It can be classified and extracted and used for automatic obstacle avoidance. For example, the microcomputer 12051 identifies obstacles around the vehicle 12100 into obstacles that are visible to the driver of the vehicle 12100 and obstacles that are difficult to see. Then, the microcomputer 12051 determines a collision risk indicating the degree of risk of collision with each obstacle, and when the collision risk exceeds a set value and there is a possibility of a collision, the microcomputer 12051 transmits information via the audio speaker 12061 and the display unit 12062. By outputting a warning to the driver via the vehicle control unit 12010 and performing forced deceleration and avoidance steering via the drive system control unit 12010, driving support for collision avoidance can be provided.
- the microcomputer 12051 determines a collision risk indicating the degree of risk of collision with each obstacle, and when the collision risk exceed
- At least one of the imaging units 12101 to 12104 may be an infrared camera that detects infrared rays.
- the microcomputer 12051 can recognize a pedestrian by determining whether the pedestrian is present in the images captured by the imaging units 12101 to 12104.
- pedestrian recognition involves, for example, a procedure for extracting feature points in images captured by the imaging units 12101 to 12104 as infrared cameras, and a pattern matching process is performed on a series of feature points indicating the outline of an object to determine whether it is a pedestrian or not.
- the audio image output unit 12052 creates a rectangular outline for emphasis on the recognized pedestrian.
- the display section 12062 is controlled so as to display the .
- the audio image output unit 12052 may control the display unit 12062 to display an icon or the like indicating a pedestrian at a desired position.
- the technology according to the present disclosure can be applied to the imaging unit 12031 among the configurations described above.
- the light emitting device 10 according to the present disclosure may be provided together with the imaging section 12031.
- the present disclosure can also have the following configuration.
- [Item 1] comprising a first base;
- the first base body is a first substrate; a light emitting element disposed on the first surface of the first substrate and having a multilayer film; a structure disposed in an inter-element region of the light emitting element on the first surface, The structure has the same multilayer film as the light emitting element, or is made of the same material as the first substrate.
- the light emitting device [Item 2] The light emitting device according to item 1,
- the first base further includes an insulating film laminated on the first surface so as to fill a gap between the light emitting element and the structure.
- the insulating film is made of an inorganic material.
- the first base has a first electrode pad disposed on the top of the light emitting element, The height of the top of the structure is lower than the height of the top of the first electrode pad.
- the light emitting device is not limited to any one of items 1 to 4, In the light emitting device, the first base body further includes a common electrode that extends up to the first surface of the first substrate, which becomes the bottom surface of the gap between the light emitting element and the structure.
- the light emitting device according to any one of claims 1 to 5,
- the first base further includes a first electrode pad placed on the top of the light emitting element, and a dummy electrode pad placed on the top of the structure.
- the light emitting device according to any one of items 1 to 6,
- the first base further includes a light emitting device having a lens portion provided on a second surface of the first substrate that is opposite to the first surface, and condensing light emitted from the light emitting element. .
- the light emitting device according to any one of items 1 to 7, further comprising a second base joined to the first base;
- the second base includes a second substrate and a second electrode pad disposed on the second substrate, A light emitting device in which a first electrode pad of the first base and a second electrode pad of the second base are joined.
- a light emitting device in which the first electrode pad and the second electrode pad are joined by direct bonding.
- a first substrate a light emitting element disposed on a first surface of the first substrate and having a multilayer film; a structure disposed in an inter-element region of the light emitting elements on the first surface; a first electrode pad disposed on the top of the structure, and the structure includes a first base body that has the same multilayer film as the light emitting element or is made of the same material as the first substrate.
- a method for manufacturing a light emitting device comprising: a third step of thinning the first substrate from a second surface side that is an opposite surface to the first surface.
- a method for manufacturing a light emitting device according to item 10 comprising: The method for manufacturing a light emitting device further includes a fourth step of forming a lens portion for condensing light emitted from the light emitting element on the second surface of the first substrate.
- a distance measurement unit that measures the distance to the The light emitting device includes: a first substrate; a light emitting element disposed on the first surface of the first substrate and having a multilayer film; a structure disposed in an inter-element region of the light emitting element on the first surface, The structure has the same multilayer film as the light emitting element, or is made of the same material as the first substrate. The distance measuring device.
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Abstract
Description
図1は、第1実施形態の発光装置10の構成を示す縦断面図である。図2は、第1実施形態の発光装置10の構成を示す横断面図であり、図1のA-A断面を示す。図3は、第1実施形態の発光装置10の発光素子22周辺の構成を示す拡大縦断面図であり、図1のB領域を示す。
図10は、第2実施形態の発光装置10におけるLDチップ20の構成を示す縦断面図である。図11は、第2実施形態の発光装置10におけるLDチップ20の構成を示す横断面図であり、図10のD-D断面を示す。
図13は、第3実施形態の発光装置10におけるLDチップ20の構成を示す縦断面図である。図14は、第3実施形態の発光装置10におけるLDチップ20の構成を示す横断面図であり、図13のE-E断面を示す。
図15は、第4実施形態の発光装置10におけるLDチップ20の構成を示す縦断面図である。図16は、第4実施形態の発光装置10におけるLDチップ20の構成を示す横断面図であり、図15のF-F断面を示す。
図17は、第5実施形態の発光装置10におけるLDチップ20の構成を示す正面図である。図18は、第5実施形態の発光装置10におけるLDチップ20の構成を示す縦断面図であり、図17のG-G断面を示す。図19は、第5実施形態の発光装置10におけるLDチップ20の構成を示す横断面図であり、図18のH-H断面を示す。
図20は、第6実施形態の発光装置10におけるLDチップ20の構成を示す縦断面図である。図21は、第6実施形態の発光装置10におけるLDチップ20の構成を示す横断面図であり、図20のI-I断面を示す。
図22は、第7実施形態の発光装置10におけるLDチップ20の構成を示す縦断面図である。
本開示の実施形態による発光装置10は、例えば、非接触で物体までの距離を計測する測距装置(測距モジュールとも呼ばれる)40で用いることができる。
本開示に係る技術は、様々な製品へ適用することができる。例えば、本開示に係る技術は、自動車、電気自動車、ハイブリッド電気自動車、自動二輪車、自転車、パーソナルモビリティ、飛行機、ドローン、船舶、ロボット等のいずれかの種類の移動体に搭載される装置として実現されてもよい。
以上、本開示の実施の形態の一例を説明したが、本開示は、その他の様々な形態で実施することが可能である。例えば、本開示の要旨を逸脱しない範囲で、種々の変形、置換、省略又はこれらの組み合わせが可能である。そのような変形、置換、省略等を行った形態も、本開示の範囲に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。
[項目1]
第1基体を備え、
前記第1基体は、
第1基板と、
前記第1基板の第1面上に配置され、多層膜を有する発光素子と、
前記第1面上における前記発光素子の素子間領域に配置された構造体と、を有し、
前記構造体は、前記発光素子と同じ前記多層膜を有する、又は、前記第1基板と同じ材料によって構成される
発光装置。
[項目2]
項目1に記載の発光装置であって、
前記第1基体は、さらに、前記第1面上に、前記発光素子と前記構造体との間隙部を埋めるように、積層された絶縁膜を有する発光装置。
[項目3]
項目2に記載の発光装置であって、
前記絶縁膜は、無機材料によって構成される発光装置。
[項目4]
項目1から3のいずれか1つに記載の発光装置であって、
前記第1基体は、前記発光素子の頂部に配置された第1電極パッドを有し、
前記構造体の頂部の高さは、前記第1電極パッドの頂部の高さよりも低い
発光装置。
[項目5]
項目1から4のいずれか1つに記載の発光装置であって、
前記第1基体は、さらに、前記発光素子と前記構造体との間隙部の底面となる前記第1基板の前記第1面上まで引かれた共通電極を有する発光装置。
[項目6]
請求項1から5のいずれか1つに記載の発光装置であって、
前記第1基体は、さらに、前記発光素子の頂部に配置された第1電極パッドと、前記構造体の頂部に配置されたダミー電極パッドと、を有する発光装置。
[項目7]
項目1から6のいずれか1つに記載の発光装置であって、
前記第1基体は、さらに、前記第1基板の前記第1面とは反対の面である第2面上に設けられ、前記発光素子から出射された光を集光するレンズ部を有する発光装置。
[項目8]
項目1から7のいずれか1つに記載の発光装置であって、
さらに、前記第1基体に接合する第2基体を備え、
前記第2基体は、第2基板と、前記第2基板上に配置された第2電極パッドと、を有し、
前記第1基体の第1電極パッドと、前記第2基体の前記第2電極パッドと、が接合されている
発光装置。
[項目9]
項目8に記載の発光装置であって、
前記第1電極パッドと前記第2電極パッドとが直接接合によって接合されている発光装置。
[項目10]
第1基板と、前記第1基板の第1面上に配置され、多層膜を有する発光素子と、前記第1面上の前記発光素子の素子間領域に配置された構造体と、前記発光素子の頂部に配置された第1電極パッドと、を有し、前記構造体は、前記発光素子と同じ前記多層膜を有する、又は、前記第1基板と同じ材料によって構成される、第1基体を作製する第1工程と、
第2基板と、前記第2基板上に配置された第2電極パッドと、を有する第2基体の前記第2電極パッドに、前記第1基体の前記第1電極パッドを接合する第2工程と、
前記第1基板を、前記第1面とは反対の面である第2面側から薄化する第3工程と、を備える
発光装置の製造方法。
[項目11]
項目10に記載の発光装置の製造方法であって、
さらに、前記第1基板の前記第2面上に前記発光素子から出射された光を集光するレンズ部を形成する第4工程を備える発光装置の製造方法。
[項目12]
発光装置と、受光部と、前記発光装置の発光信号が対象物で反射されて前記受光部で受光されたときに、前記発光装置の発光信号と前記受光部の受光信号とに基づいて対象物までの距離を計測する距離計測部と、を備え、
前記発光装置は、
第1基板と、
前記第1基板の第1面上に配置され、多層膜を有する発光素子と、
前記第1面上における前記発光素子の素子間領域に配置された構造体と、を有し、
前記構造体は、前記発光素子と同じ前記多層膜を有する、又は、前記第1基板と同じ材料、によって構成される
測距装置。
20 LDチップ(第1基体)
21 基板(第1基板)
21a レンズ部
21H 縦穴部
22 発光素子
22L 多層膜
221 第1ミラー層
222 第1スペーサ層
223 活性層
224 第2スペーサ層
225 第2ミラー層
23 構造体
24 絶縁膜
25 個別電極(第1電極パッド)
25D ダミー電極パッド
26 共通電極
27 間隙部
27C 接続部
30 LDD基板(第2基体)
31 基板(第2基板)
32 電極パッド(第2電極パッド)
91 レジスタ
92 仮基板
92a 粘着層
93 マウントシート
Claims (12)
- 第1基体を備え、
前記第1基体は、
第1基板と、
前記第1基板の第1面上に配置され、多層膜を有する発光素子と、
前記第1面上における前記発光素子の素子間領域に配置された構造体と、を有し、
前記構造体は、前記発光素子と同じ前記多層膜を有する、又は、前記第1基板と同じ材料によって構成される
発光装置。 - 請求項1に記載の発光装置であって、
前記第1基体は、さらに、前記第1面上に、前記発光素子と前記構造体との間隙部を埋めるように、積層された絶縁膜を有する発光装置。 - 請求項2に記載の発光装置であって、
前記絶縁膜は、無機材料によって構成される発光装置。 - 請求項1に記載の発光装置であって、
前記第1基体は、前記発光素子の頂部に配置された第1電極パッドを有し、
前記構造体の頂部の高さは、前記第1電極パッドの頂部の高さよりも低い
発光装置。 - 請求項1に記載の発光装置であって、
前記第1基体は、さらに、前記発光素子と前記構造体との間隙部の底面となる前記第1基板の前記第1面上まで引かれた共通電極を有する発光装置。 - 請求項1に記載の発光装置であって、
前記第1基体は、さらに、前記発光素子の頂部に配置された第1電極パッドと、前記構造体の頂部に配置されたダミー電極パッドと、を有する発光装置。 - 請求項1に記載の発光装置であって、
前記第1基体は、さらに、前記第1基板の前記第1面とは反対の面である第2面上に設けられ、前記発光素子から出射された光を集光するレンズ部を有する発光装置。 - 請求項1に記載の発光装置であって、
さらに、前記第1基体に接合する第2基体を備え、
前記第2基体は、第2基板と、前記第2基板上に配置された第2電極パッドと、を有し、
前記第1基体の第1電極パッドと、前記第2基体の前記第2電極パッドと、が接合されている
発光装置。 - 請求項8に記載の発光装置であって、
前記第1電極パッドと前記第2電極パッドとが直接接合によって接合されている発光装置。 - 第1基板と、前記第1基板の第1面上に配置され、多層膜を有する発光素子と、前記第1面上の前記発光素子の素子間領域に配置された構造体と、前記発光素子の頂部に配置された第1電極パッドと、を有し、前記構造体は、前記発光素子と同じ前記多層膜を有する、又は、前記第1基板と同じ材料によって構成される、第1基体を作製する第1工程と、
第2基板と、前記第2基板上に配置された第2電極パッドと、を有する第2基体の前記第2電極パッドに、前記第1基体の前記第1電極パッドを接合する第2工程と、
前記第1基板を、前記第1面とは反対の面である第2面側から薄化する第3工程と、を備える
発光装置の製造方法。 - 請求項10に記載の発光装置の製造方法であって、
さらに、前記第1基板の前記第2面上に前記発光素子から出射された光を集光するレンズ部を形成する第4工程を備える発光装置の製造方法。 - 発光装置と、受光部と、前記発光装置の発光信号が対象物で反射されて前記受光部で受光されたときに、前記発光装置の発光信号と前記受光部の受光信号とに基づいて対象物までの距離を計測する距離計測部と、を備え、
前記発光装置は、
第1基板と、
前記第1基板の第1面上に配置され、多層膜を有する発光素子と、
前記第1面上における前記発光素子の素子間領域に配置された構造体と、を有し、
前記構造体は、前記発光素子と同じ前記多層膜を有する、又は、前記第1基板と同じ材料、によって構成される
測距装置。
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| CN202380028135.6A CN118891793A (zh) | 2022-03-31 | 2023-02-06 | 发光装置、发光装置的制造方法和测距装置 |
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| WO2021166473A1 (ja) * | 2020-02-19 | 2021-08-26 | ソニーセミコンダクタソリューションズ株式会社 | 発光装置およびその製造方法 |
| JP2021197514A (ja) * | 2020-06-17 | 2021-12-27 | ソニーセミコンダクタソリューションズ株式会社 | 半導体装置、半導体装置の製造方法、および充填樹脂 |
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| US20250202187A1 (en) | 2025-06-19 |
| JP2023151011A (ja) | 2023-10-16 |
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