WO2020240968A1 - Method and device for manufacturing camera module, and method for manufacturing optical module - Google Patents

Abstract

The present disclosure provides a device for manufacturing a camera module without requiring furnace equipment, the device making it possible to suppress positional displacement caused by curing shrinkage and uncured portions.　A method for manufacturing a camera module according to the present disclosure is characterized by having: a step for applying a delayed-curing UV adhesive (32) to an adhesive application surface (8) of an imaging unit (9) having an imaging element (4) and the adhesive application surface (8); a step for irradiating the delayed-curing UV adhesive (32) applied to the adhesive application surface (8) with a first UV light (51); a step for bonding the imaging unit (9) and a lens unit (3) that has an optical lens by using the delayed-curing UV adhesive (32), which has been irradiated with the first UV light (51); and a step for irradiating the delayed-curing UV adhesive (32) that bonds the lens unit (3) and the imaging unit (9) with a second UV light (52).

Description

Camera module manufacturing method and manufacturing equipment, and optical module manufacturing method

The present disclosure relates to a method and an apparatus for manufacturing a camera module composed of an imaging unit and a lens unit, and a method for manufacturing an optical module composed of a lens and a light receiving element or a light emitting element.

The camera module, which is an example of the optical module, is composed of an imaging unit and a lens unit. The image pickup unit holds the image pickup element and the substrate by a holder or the like. The lens unit has an optical lens that forms an image on the image sensor and a lens barrel that supports the optical lens. The camera module is manufactured as follows, for example.
First, the assembled imaging unit and lens unit are prepared. Next, the image pickup unit and the lens unit are adhered with an adhesive. Then, while imaging the chart to focus, adjust the positions of the imaging unit and the lens unit, cure and fix the adhesive at the position where the resolution is the highest, and remove it from the manufacturing equipment to complete the camera module. It becomes.

In the conventional camera module, first, the image sensor is prevented from tilting by a mounting portion that fixes the image sensor horizontally, and then the image sensor and the lens unit are adhered to each other by using UV and a thermosetting adhesive. Then, after curing by locally irradiating the UV and thermosetting adhesive that adheres the lens unit and the image pickup unit with UV light so that the position of the lens unit does not shift, the UV light is applied. In order to suppress misalignment due to the uncured portion, it was manufactured by putting it in a furnace facility and curing it so as to eliminate the uncured portion (see, for example, Patent Document 1).

International Publication No. 2016/059914

However, in such a camera module manufacturing method, it was necessary to use the equipment of the furnace in order to eliminate the uncured part. In addition, after thermosetting by the furnace equipment, it took more time for the cooling process to cool.

The present disclosure has been made in order to solve the above-mentioned problems, and it is possible to manufacture a camera module without providing a furnace facility and shortening the working time in the cooling process. The purpose is to provide a method.

The method for manufacturing a camera module according to the present disclosure includes a step of applying a delayed curing type UV adhesive to an adhesive-coated surface of an imaging unit having an imaging element and an adhesive-coated surface, and a delay applied to the adhesive-coated surface. A step of irradiating the curable UV adhesive with the first UV light, and a step of adhering the lens unit having an optical lens and the imaging unit via the delayed curable UV adhesive irradiated with the first UV light. It is characterized by having a step of irradiating a second UV light on a delayed curing type UV adhesive that adheres the lens unit and the image pickup unit.

According to the present disclosure, efficient UV light irradiation can reduce the cost of equipping the equipment of the furnace, and can shorten the working time of the cooling process to manufacture the camera module.

Schematic diagram of the camera module before combining the lens unit and the imaging unit. The schematic diagram of the camera module which combined the lens unit and the image pickup unit. The schematic diagram of the manufacturing apparatus of the camera module at the time of the coating process which concerns on Embodiment 1. FIG. FIG. 3 is a schematic view of a camera module manufacturing apparatus in which a control unit and each controller are added to FIG. The plan view and the sectional view of the 1st irradiation part which concerns on Embodiment 1. FIG. A plan view and a cross-sectional view of the spot type UV irradiator according to the first embodiment. An example of a flowchart of the manufacturing process of the camera module according to the first embodiment. An example of a detailed flowchart of the manufacturing process of the camera module according to the first embodiment. The schematic diagram of the manufacturing apparatus of the camera module at the time of the 1st UV light irradiation process which concerns on Embodiment 1. FIG. The schematic diagram of the manufacturing apparatus of the camera module at the time of the position adjustment process of the lens unit which concerns on Embodiment 1 and at the time of the 2nd UV light irradiation process. The schematic diagram of the chart part at the time of the position adjustment process of the lens unit which concerns on Embodiment 1. FIG. The schematic diagram of the manufacturing apparatus of the camera module at the time of the coating process which concerns on Embodiment 2 and at the time of the first UV light irradiation. An example of a flowchart of the manufacturing process of the camera module according to the second embodiment. The schematic diagram of the manufacturing apparatus of the camera module at the time of the position adjustment process which concerns on Embodiment 3 and at the time of the second UV light irradiation. The schematic diagram of the manufacturing apparatus of the camera module at the time of acquisition of the coating state by the camera which concerns on Embodiment 4. FIG. An example of a flowchart of the manufacturing process of the camera module according to the fourth embodiment.

Embodiment 1.
FIG. 1 shows an example of a schematic view of a camera module 10 before the lens unit 3 and the image pickup unit 9 are bonded to each other via the delayed curing type UV adhesive 32.
From FIG. 1, the lens unit 3 is composed of an optical lens 1, a lens barrel 2a, and a lens barrel adhesive surface 2b. The image pickup unit 9 is composed of an image pickup element 4, a connector 5, a holder 6, a substrate 7, and an adhesive coating surface 8. The holder 6 holds the image sensor 4, the connector 5, and the substrate 7. Further, there is an adhesive coating surface 8 on the holder 6 of the image pickup unit 9 that is adhered to the lens unit 3. The adhesive is applied on the circumference of the adhesive coating surface 8.

In the present embodiment, the adhesive applied to the adhesive coating surface 8 is a delayed curing type UV adhesive 32. It is shown as shown in FIG. 1 in order to make it easy to understand that the delayed curing type UV adhesive 32 is applied to the adhesive application surface 8.
If neither the adhesive-coated surface 8 nor the lens barrel adhesive surface 2b is a member that transmits UV light, the adhesive cannot be irradiated with UV light after the parts are bonded together, and sufficient adhesion is achieved. It becomes difficult to obtain strength. Therefore, in order to bond the parts, in the present embodiment, the curing reaction is started by the UV light emitted before the parts are bonded, and the curing is completed after the parts are bonded. Agent 32 is used.
The delayed curing type UV adhesive 32 is activated by irradiation with UV light to start a curing reaction. Further, since the delayed curing type UV adhesive 32 can be kept in a liquid state for a certain period of time after being irradiated with the UV light required to start the curing reaction, it is possible to bond the members to be bonded to each other. Has a pot life that is time. The delayed-curing UV adhesive 32 is an adhesive in which the curing reaction proceeds sufficiently and curing is completed without additionally applying energy such as light or heat after bonding.
The material of the delayed curing type UV adhesive 32 includes, for example, a cationic polymerization epoxy adhesive, a radical polymerization acrylic adhesive, an addition type silicone adhesive, and the like, but in the present embodiment, the material of the cationic polymerization is Epoxy resin is used. The pot life of the delayed curing UV adhesive 32 varies depending on the integrated amount of UV light to be irradiated. For example, when UV light of 50 mJ / cm ² to 500 mJ / cm ² is irradiated, the pot life is about 3 to 60 minutes, and when UV light of 1000 mJ / cm ² or more is irradiated, the pot life is about several seconds. ..

FIG. 2 is a schematic view showing a camera module 10 formed by applying a delayed curing type UV adhesive 32 to an adhesive coating surface 8 and adhering a lens unit 3 and an image pickup unit 9. From FIGS. 1 and 2, it can be seen that the camera module 10 of the present embodiment is configured by adhering the lens unit 3 and the image pickup unit 9 with the delayed curing type UV adhesive 32.

FIG. 3 is a schematic view of the camera module manufacturing apparatus 100a of the present embodiment in which a part is omitted for easy viewing.
FIG. 4 is an overall schematic view of the camera module manufacturing apparatus 100a in which the control unit 26 and each controller are added to FIG.
FIG. 5 (1) shows a plan view of the first irradiation unit 16a. FIG. 5 (2) shows an XX cross-sectional view of the first irradiation unit 16a. FIG. 6 (1) is a plan view of the second irradiation units 18a to 18d. FIG. 6 (2) is a YY cross-sectional view of the second irradiation units 18a to 18d.
The configuration of the camera module manufacturing apparatus 100a will be described with reference to FIGS. 3 to 5.

From FIGS. 3 and 4, the camera module manufacturing apparatus 100a includes a holder mounting base 11, a feed stage 12, a syringe 13, a syringe mounting plate 14a, a 3-axis robot 15, a first irradiation unit 16a, a UV light shielding plate 17a, and a first. 2 Irradiation unit 18a to 18d, lens unit holding unit 19, 5-axis adjustment stage 20, chart unit 21, dispenser 22, image processing board 23, UV controllers 24a and 24b, stage controllers 25a and 25b, and control unit 26. ing.
The control unit 26 controls the dispenser 22, the image processing board 23, the UV controllers 24a and 24b, and the stage controllers 25a and 25b.
The stage that supports the image pickup unit 9 is composed of a feed stage 12 and a holder mounting base 11. The image pickup unit 9 is arranged on the holder mounting base 11 installed on the feed stage 12. Further, the image pickup unit 9 is controlled by the control unit 26 via the image processing board 23.
Further, the feed stage 12 is controlled by the control unit 26 via the stage controller 25b, and moves the image pickup unit 9 to the 5-axis adjustment stage 20.

The adhesive application portion is composed of a syringe mounting plate 14a, a syringe 13, a 3-axis robot 15, a stage controller 25a, and a dispenser 22, and a delayed curing type UV adhesive 32 is applied to the adhesive application surface 8. The syringe mounting plate 14a is installed on the 3-axis robot 15. The syringe 13 is filled with the delayed curing type UV adhesive 32, and is provided on the upper portion in the vertical direction of the adhesive application surface 8 sent by the feed stage 12 when the delayed curing type UV adhesive 32 is applied. It is installed on the syringe mounting plate 14a. The 3-axis robot 15 is controlled by the control unit 26 via the stage controller 25a. Further, the syringe mounting plate 14a is controlled and moved by the control unit 26 via the dispenser 22 so that the delayed curing type UV adhesive 32 can be applied from the syringe 13.

The adjustment unit includes a 5-axis adjustment stage 20, a lens unit holding unit 19, and a stage controller 25b, and adjusts the position of the lens unit 3.
The 5-axis adjustment stage 20 holds the lens unit holding portion 19. A chart portion 21 for aligning the lens unit 3 is installed above the lens unit holding portion 19. The 5-axis adjustment stage 20 is controlled by the control unit 26 via the stage controller 25b based on the imaging result of the chart unit 21. The control unit 26 moves the lens unit holding unit 19 by moving the 5-axis adjustment stage 20 in the X-axis, Y-axis, Z-axis, X-axis rotation direction, and Y-axis rotation direction, and adjusts the position of the lens unit 3. .. The operation of adjusting the position of the lens unit 3 will be described in detail later.

As shown in FIG. 5, the first irradiation unit 16a is a line type UV irradiator. The first irradiation unit 16a is controlled by the control unit 26 via the UV controller 24a, and irradiates the entire adhesive-coated surface 8 with the first UV light 51. The second irradiation units 18a to 18d are spot type UV irradiators. The second irradiation units 18a to 18d are controlled by the control unit 26 via the UV controller 24b, and the second UV light 52 is applied to the delayed curing type UV adhesive 32 that adheres the lens unit 3 and the image pickup unit 9. Irradiate locally.

Since the first irradiation unit 16a irradiates the first UV light 51 in a line, the adhesive coating surface 8 is moved with respect to the light source, or the light source is moved with respect to the adhesive coating surface 8. , The entire surface 8 coated with the adhesive is irradiated. The time for irradiating the adhesive-coated surface 8 with the first UV light 51 is adjusted according to the moving speed. Further, the integrated light amount is adjusted by adjusting the irradiation time.
As the shape of the portion irradiated with the first UV light 51, an area type UV irradiator having a certain area may be used so that the entire surface of the adhesive coating surface 8 can be irradiated.

The UV light shielding plate 17a is installed between the first irradiation unit 16a and the syringe 13. Since the UV light shielding plate 17a can block the first UV light 51 irradiated by the first irradiation unit 16a from hitting the tip of the syringe 13, the adhesive-coated surface 8 is filled with the syringe 13 before application. It is possible to prevent the delayed curing type UV adhesive 32 from being cured.

As shown in FIG. 6, the second irradiation units 18a to 18d, which are spot-type UV irradiators, have a lens of the optical lens 1 on a delayed curing type UV adhesive 32 in which the image pickup unit 9 and the lens unit 3 are adhered. It is installed so that the second UV light 52 can be irradiated from two or more locations orthogonal to the optical axis and facing each other. If the irradiation of the second UV light 52 is biased, the curing shrinkage of the delayed curing type UV adhesive 32 is biased, and the lens unit 3 is tilted. Therefore, the second irradiation units 18a to 18d need to be installed at two or more locations so as to face each other. In order to further suppress the tilt of the lens unit 3, it is desirable to install the lens unit 3 at four locations so as to face each other. In the present embodiment, the second irradiation units 18a to 18d are installed at four locations as shown in FIG.

The difference between the first irradiation unit 16a and the second irradiation units 18a to 18d is the integrated amount of light to be irradiated and the method of irradiation. The first UV light 51 emitted from the first irradiation unit 16a has a smaller integrated amount of UV light emitted than the second irradiation units 18a to 18d, and is perpendicular to the adhesive coating surface 8 and is entirely from the upper surface. Irradiate the target. The second UV light 52 emitted from the second irradiation units 18a to 18d has a larger integrated amount of UV light than the first irradiation unit 16a, and is a delayed curing type in which the image pickup unit 9 and the lens unit 3 are adhered to each other. Irradiate the UV adhesive horizontally and locally toward the axis of the lens unit 3. The amount of each UV light will be described later.

Next, the main processing flow of the manufacturing apparatus 100a of the camera module in the actual form will be described. FIG. 7 is a flowchart showing a main processing flow of the manufacturing apparatus 100a of the camera module in the actual form.
First, in step S1, the syringe 13 applies the delayed-curing UV adhesive 32 to the adhesive-coated surface 8 of the imaging unit 9.
In step S2, the first irradiation unit 16a irradiates the adhesive-coated surface 8 with the first UV light 51, which is the first UV light.
In step S3, the 5-axis adjustment stage 20 adjusts the position of the lens unit 3 using the image acquired from the image pickup unit 9.
In step S4, the second irradiation units 18a to 18d locally direct the second UV light, which is the second UV light, toward the delayed curing UV adhesive 32 that adheres the image pickup unit 9 and the lens unit 3. The light 52 is irradiated.
As a result of steps S1 to S4, the camera module 10 is completed.

FIG. 8 is an example of a flowchart showing the main processing of FIG. 7 in more detail. 3 and 9 to 11 will be described with reference to FIG.
FIG. 9 shows a schematic view of the camera module manufacturing apparatus 100a when the first UV light 51 is irradiated.
FIG. 10 shows a schematic view of the camera module manufacturing apparatus 100a when the position of the lens unit 3 is adjusted and when the second UV light 52 is irradiated.
FIG. 11 is a diagram showing an example of a chart unit 21 used when adjusting the position of the lens unit 3.

In step S101, as shown in FIG. 3, the feed stage 12 is controlled and moved by the control unit 26 via the stage controller 25b so that the imaging unit 9 is located below the syringe 13.
In step S102, the syringe 13 is delayed to the adhesive coating surface 8 via the dispenser 22 while moving on the circumference above the adhesive coating surface 8 by the 3-axis robot 15 controlled via the stage controller 25a. The curable UV adhesive 32 is applied.
In order for the lens unit 3 and the image pickup unit 9 to be adhered, the delayed curing type UV adhesive 32 is applied thicker than the gap formed when the lens unit 3 and the image pickup unit 9 are combined so as to be adhered to each other. The viscosity needs to be maintained until the position adjustment operation of the lens unit 3 in step S3. Therefore, it is desirable that the delayed-curing UV adhesive 32 to be applied has a high thixotropy property, which is a property that the viscosity increases with the passage of time and finally becomes a solid state.

In step S103, the feed stage 12 is controlled and moved by the control unit 26 via the stage controller 25b so that the image pickup unit 9 passes below the first irradiation unit 16a as shown in FIG.
In step S104, the first irradiation unit 16a uniformly irradiates the entire delayed curing type UV adhesive 32 with the first UV light 51 as the image pickup unit 9 passes through.
The integrated light amount of the first UV light 51 is determined according to the output of the first irradiation unit 16a and the moving speed of the feed stage 12. The integrated light amount of the first UV light 51 is such that the delayed curing type UV adhesive 32 is not completely cured and the delayed curing is started. For example, at 50 mJ / cm ² to 500 mJ / cm ² . is there. In this embodiment, it is 250 mJ / cm ² .

In step S105, the feed stage 12 is controlled and moved by the control unit 26 via the stage controller 25b so that the image pickup unit 9 is arranged below the chart unit 21 as shown in FIG.
In step S106, the lens unit 3 is moved toward the image pickup unit 9 by the 5-axis adjustment stage 20, so that the delayed curing UV adhesive 32 applied to the adhesive coating surface 8 and the lens barrel adhesive surface of the lens unit 3 are adhered. Make contact with 2b. This step S106 is a step that is preferably performed before the step of step S107.

In step S107, the resolution of each test pattern irradiated from the chart unit 21 to the image sensor 4 is acquired in order to adjust the position of the lens unit 3.
FIG. 11 shows an example of a test pattern for irradiating the image sensor 4 from the chart unit 21, and the test patterns 29a to 29e are displayed at the center and the four corners.
The central test pattern 29a has, for example, a cross mark as a central mark. The chart portion 21 is provided so that the cross mark, which is the central test pattern 29a, is in line with the image sensor 4.

In step S108, the position of the lens unit 3 is adjusted by the 5-axis adjustment stage 20 to the position of the highest resolution among the resolutions of the test patterns 29a to 29e acquired in step S107.

In step S109, the second irradiation units 18a to 18d irradiate the delayed curing UV adhesive 32, which adheres the lens unit 3 and the image pickup unit 9, with UV light for the second time. In order to prevent the lens unit 3 from shifting its optical axis due to its own weight, the second UV light 52 is locally irradiated with a stronger output than the first UV light 51 in step S104, and is irradiated in a short period of time. The amount of light used to cure the delayed-curing UV adhesive 32.
That is, the amount of light of the second UV light 52 is larger than the amount of light of the first UV light 51, and is the amount of light that cures the delayed curing type UV adhesive 32 so that the lens unit 3 is fixed. At the amount of light of the second UV light 52, the delayed curing type UV adhesive 32 is cured so that the lens unit 3 can withstand its own weight. The integrated light amount of the second UV light 52 is, for example, 1000 mJ / cm2 or more, and 2500 mJ in the example of this embodiment.
Further, in order to prevent the lens unit 3 from tilting due to the difference in the curing speed of the delayed curing type UV adhesive 32, in the present embodiment, the second irradiation portions 18a to 18d are installed from four places, and the second irradiation unit 18a to 18d is provided with the same strength. UV light 52 is irradiated.

In step S110, the lens unit holding portion 19 opens the lens unit 3, and the manufacturing process of the camera module is completed.

Further, in the irradiation of the second UV light 52 in step S109, it is desirable to cure the delayed curing type UV adhesive 32 to the deep part, so that a lamp type spot type UV irradiator including a plurality of wavelengths is desirable.
Immediately after the end of the manufacturing process in step S110, the uncured portion of the delayed-curing UV adhesive 32 remains, but the entire delayed-curing UV adhesive 32 is cured with the passage of time by the irradiation of the first UV light 51. .. Further, since the lens unit 3 was fixed to such an extent that it could withstand its own weight by the irradiation of the second UV light 52 in step S109, the manufacturing process of the camera module did not wait for the entire delayed curing type UV adhesive 32 to be completely cured. It is possible to proceed to the next process after the completion of.

In the present embodiment, the adhesive coated surface 8 coated with the delayed curing UV adhesive 32 is entirely irradiated with the first UV light 51, and the second UV light 52 is bonded to the lens unit 3 and the imaging unit 9. UV light is efficiently irradiated, such as irradiating the delayed curing type UV adhesive 32. As a result, it is possible to manufacture a camera module that does not have a furnace facility, shortens the cooling process time, and suppresses misalignment due to uncured portions and curing shrinkage.

The camera module 10 according to this embodiment is given as an example of an optical module. The optical module is composed of a lens unit having an optical lens and an optical element unit having a light emitting element or a light receiving element. In the camera module 10 according to the present embodiment, the lens unit 3 is a lens unit, and the image pickup unit 9 is an optical element portion having an image pickup element which is a light receiving element. In the optical module, the optical element portion has an adhesive coating surface, and the delayed curing type UV adhesive 32 is applied. The delayed curing type UV adhesive 32 is applied to the optical element portion, and the lens portion and the optical element portion are adhered to each other via the delayed curing type UV adhesive 32.

Embodiment 2.
The difference between the second embodiment and the first embodiment is that in the first embodiment, the syringe 13, the first irradiation unit 16a, and the UV light shielding plate 17a are provided apart from each other. In the second embodiment, not only the syringe but also the first irradiation unit and the UV light shielding plate are provided on the syringe mounting plate. In the following, only the differences from the first embodiment will be described, and the description of the same or corresponding parts will be omitted. Regarding the reference numerals, the same or corresponding parts as those in the first embodiment will be the same reference numerals, and the description thereof will be omitted.

FIG. 12 is a schematic view of the camera module manufacturing apparatus 100b according to the present embodiment, which is partially omitted for easy viewing.
In the camera module manufacturing apparatus 100b, a syringe 13, a UV light shielding plate 17b, and a first irradiation unit 16b are provided on the syringe mounting plate 14b.
FIG. 13 is a flowchart showing in detail the main processing flow of the processing of the manufacturing apparatus 100b of the camera module in the actual form.
The difference from the flowchart of FIG. 8 of the first embodiment is step S202.
In step S202, the first irradiation unit 16b moves following the syringe 13 applying the delayed curing type UV adhesive 32, and irradiates the adhesive application surface 8 with UV light.
Steps S201 and S203 to S208 are the same processes as steps S101 and S105 to S111 of FIG.

In the present embodiment, as in the first embodiment, the adhesive coated surface 8 coated with the delayed curing UV adhesive 32 is entirely irradiated with the first UV light 51, and the second UV light 52 is used as a lens. UV light is efficiently irradiated, such as by irradiating the delayed curing type UV adhesive 32 that adheres the unit 3 and the imaging unit 9. As a result, it is possible to manufacture a camera module that does not have a furnace facility, shortens the cooling process time, and suppresses misalignment due to uncured portions and curing shrinkage.

Further, in the present embodiment, since the first UV light 51 is irradiated following the application of the delayed curing type UV adhesive 32, even the delayed curing type UV adhesive 32 having a low thixotropy is a delayed curing type. Since the first UV light 51 can be irradiated immediately after the application of the UV adhesive 32, the delayed curing type UV adhesive 32 can be cured while maintaining its shape.

Embodiment 3.
The difference between the third embodiment and the first and second embodiments is that in the first and second embodiments, a chart portion is provided to adjust the position of the lens unit, whereas in the third embodiment, the collimator chart is provided. The point is that the unit is provided. In the following, only the differences from the first and second embodiments will be described, and the description of the same or corresponding parts will be omitted. Regarding the reference numerals, the same or corresponding parts as those in the first embodiment will be the same reference numerals, and the description thereof will be omitted.

FIG. 14 is a schematic view of the camera module manufacturing apparatus 100c according to the present embodiment, which is partially omitted for easy viewing.
In the camera module manufacturing apparatus 100c, collimator chart units 31a to 31e are provided instead of the chart unit 21. Others installed are the same as those in the first embodiment. The collimator chart units 31a to 31e are composed of a collimator lens 27, a chart glass 28, and an LED 30.
Test patterns 29a to 29e are printed on the chart glass 28.
The light from the LED 30 passes through the chart glass 28 and the collimator lens 27, and reproduces the test patterns 29a to 29e from infinity.

The processing flow of the camera module manufacturing apparatus 100c is the same as the flowchart shown in FIG. 8, but the processing methods of steps S107 and S108 are different.
In step S107 of the present embodiment, the resolution of each test pattern irradiated to the image sensor 4 is acquired from the collimator chart units 31a to 31e in order to adjust the position of the lens unit 3. The test patterns 29a to 29e used are the same.

In step S108, the position of the lens unit 3 is adjusted by the 5-axis adjustment stage 20 to the position of the highest resolution among the resolutions of the test patterns 29a to 29e of the collimator chart units 31a to 31e acquired in step S107.

In the present embodiment, five cameras are provided with test patterns 29a to 29e, and five collimator chart units 31a to 31e are provided accordingly. However, when adjusting the position of the lens unit 3 in the narrow field of view, one collimator chart unit 31a may be installed in the center.

In the present embodiment, as in the first embodiment, the adhesive coated surface 8 coated with the delayed curing UV adhesive 32 is entirely irradiated with the first UV light 51, and the second UV light 52 is used as a lens. UV light is efficiently irradiated, such as by irradiating the delayed curing type UV adhesive 32 that adheres the unit 3 and the imaging unit 9. As a result, it is possible to manufacture a camera module that does not have a furnace facility, shortens the cooling process time, and suppresses misalignment due to uncured portions and curing shrinkage.

Further, in the present embodiment, in the case of manufacturing a camera module having a wide field of view or a long shortest shooting distance, the size of the chart or the distance between the chart and the lens unit must be secured, but the collimator chart unit is used. As a result, it is possible to shorten the time and save space in the camera module manufacturing apparatus.

Embodiment 4.
The difference between the fourth embodiment and the first to third embodiments is that in the first to third embodiments, the lens alignment in step S3 is performed after the first UV irradiation in step S2. Further, in the fourth embodiment, a step of acquiring the application status of the delayed curing type UV adhesive 32 and confirming whether or not there is any abnormality is added between steps S2 and S3. In the following, only the differences from the first to third embodiments will be described, and the description of the same or corresponding parts will be omitted. Regarding the reference numerals, the same or corresponding parts as those of the first to third embodiments are the same reference numerals, and the description thereof will be omitted.

FIG. 15 is a schematic view of the camera module manufacturing apparatus 100d according to the present embodiment, which is partially omitted for easy viewing.
The camera module manufacturing apparatus 100d is located between the first irradiation unit 16a and the second irradiation units 18a to 18d, and includes the camera 33 on the upper portion of the feed stage 12. The camera 33 photographs the coating state of the delayed curing type UV adhesive 32 on the adhesive coating surface 8.

FIG. 16 is a flowchart showing a main processing flow of the manufacturing apparatus 100d of the camera module in the actual form.
In step S301, the delayed curing type UV adhesive 32 is applied to the adhesive application surface 8 in the same manner as in step S1.
In step S302, as in step S2, the first UV light 51, which is the first UV light, is irradiated.
In step S303, the application status of the delayed curing type UV adhesive 32 is acquired. The camera 33 photographs the adhesive coating surface 8 of the imaging unit 9 fed by the feed stage 12 to acquire the coating status.

In step S304, the control unit 26 determines whether or not there is an abnormality using the acquired image. The control unit 26 determines in advance the reference value to be determined.
The control unit 26 performs image processing of the acquired image to acquire the coating area and the coating position. After that, it is determined whether or not it is abnormal from the comparison result of the predetermined reference value, the coating area value of the acquired image, and the coating position.
The reference value is compared with the area value of the acquired image, and if it is larger or smaller than the reference value, it is judged to be abnormal. Similarly, regarding the coating position, if the coating position deviates from a predetermined reference value or is interrupted, it is determined to be abnormal. If at least one of the area value and the coating position is abnormal, it is judged to be abnormal. If it is determined to be abnormal, the process proceeds to step S307.
If the area value and the coating position are the reference values, it is judged to be normal. If it is determined to be normal, the process proceeds to step S305.
In step S305, the position of the lens unit 3 is adjusted in the same manner as in step S3.
In step S306, similarly to step S4, the second UV light 52, which is the second UV light, is locally directed toward the delayed curing UV adhesive 32 that adheres the image pickup unit 9 and the lens unit 3. Irradiate.
If it is determined in step S304 that the abnormality is found, in step S307, the assembly is interrupted and the operator is notified of the abnormality.
The notification of the abnormality to the operator is, for example, transmitting a notification sound, or if the control unit 26 has a display screen, the fact that the abnormality is displayed is displayed on the display screen.

In the present embodiment, as in the first embodiment, the adhesive coated surface 8 coated with the delayed curing UV adhesive 32 is entirely irradiated with the first UV light 51, and the second UV light 52 is used as a lens. UV light is efficiently irradiated, such as by irradiating the delayed curing type UV adhesive 32 that adheres the unit 3 and the imaging unit 9. As a result, it is possible to manufacture a camera module that is not equipped with a furnace facility, shortens the cooling process time, and suppresses misalignment due to uncured portions and curing shrinkage.

If the amount of coating is small due to a defect in the adhesive coating part, the adhesive strength will be insufficient and the camera module 10 will be defective. Further, when the coating amount is large, the camera module 10 becomes a defective product because an uncured portion remains at a predetermined integrated amount of UV light. When the camera module 10 is completed, it becomes difficult to inspect the adhesive portion between the lens unit 3 and the imaging unit 9, so even if a defective product such as insufficient adhesive strength or residual uncured portion occurs, it cannot be detected and leaks out. Resulting in.

In the present embodiment, when there is a problem in the adhesive coating portion, the coating surface of the delayed curing type UV adhesive 32 can detect a change in the coating amount with the camera 33 before adhering the lens unit. Therefore, the outflow of defects can be suppressed.

1 Optical lens 3 Lens unit 4 Imaging element 8 Adhesive coated surface 9 Imaging unit 10 Camera module 12 Feed stage 16a, 16b 1st irradiation unit 18a-18d 2nd irradiation unit 20 5-axis adjustment stage 21 Chart unit 26 Control unit 27 Collimator Lens 28 Chart glass 29a-29e Test pattern 31a-31e Collimator chart unit 32 Delayed curing UV adhesive 100a, 100b, 100c Camera module manufacturing equipment

Claims (17)

A step of applying a delayed curing type UV adhesive to the adhesive coating surface of an imaging unit having an image pickup element and an adhesive coating surface,
A step of irradiating the delayed curing type UV adhesive applied to the adhesive-coated surface with a first UV light,
A step of adhering a lens unit having an optical lens and the imaging unit via the delayed curing type UV adhesive irradiated with the first UV light.
A step of irradiating the delayed curing UV adhesive, which adheres the lens unit and the imaging unit, with a second UV light,
A method of manufacturing a camera module, which comprises. The amount of light of the first UV light is the amount of light that initiates the reaction of the delayed curing type UV adhesive applied to the adhesive-coated surface.
The manufacture of the camera module according to claim 1, wherein the amount of light of the second UV light is larger than the amount of light of the first UV light and is the amount of light that cures the delayed-curing UV adhesive. Method. The method for manufacturing a camera module according to claim 1 or 2, wherein the second UV light is emitted from two or more locations that are orthogonal to the optical axis of the optical lens and face each other. The delayed-curing UV adhesive is applied to the entire surface of the adhesive-coated surface.
The camera module according to any one of claims 1 to 3, wherein the first UV light is applied to the entire surface of the adhesive-coated surface to which the delayed-curing UV adhesive is applied. Manufacturing method. Following the delayed curing UV adhesive being applied to the adhesive coated surface,
The production of the camera module according to any one of claims 1 to 3, wherein the first UV light is applied to the adhesive-coated surface to which the delayed-curing UV adhesive is applied. Method. Between the step of irradiating the first UV light and the step of adhering.
It has a step of acquiring the application status of the delayed curing type UV adhesive irradiated with the first UV light.
If the obtained result is not a predetermined reference value of the coating state, the process of irradiating the second UV light is not performed.
If the acquired result is the reference value, the process proceeds to the step of irradiating the second UV light.
The method for manufacturing a camera module according to any one of claims 1 to 5, wherein the camera module is manufactured. A stage that supports an image sensor and an image pickup unit with an adhesive-coated surface,
An adhesive coating portion for applying a delayed curing type UV adhesive to the adhesive coating surface, and an adhesive coating portion.
A first irradiation portion that irradiates the delayed curing type UV adhesive coated on the adhesive-coated surface with the first UV light,
An adjusting unit that adjusts the position of the lens unit having an optical lens and adheres the lens unit and the imaging unit to each other.
A second irradiation unit that irradiates the delayed curing UV adhesive that adheres the lens unit and the image pickup unit with the second UV light,
A control unit that controls the stage, the adhesive coating unit, the first irradiation unit, the adjustment unit, and the second irradiation unit.
Camera module manufacturing equipment equipped with. The amount of light of the first UV light is the amount of light that initiates the reaction of the delayed-curing UV adhesive applied to the adhesive-coated surface.
The production of the camera module according to claim 7, wherein the amount of light of the second UV light is larger than the amount of light of the first UV light and is the amount of light that cures the delayed curing type UV adhesive. apparatus. The camera module manufacturing apparatus according to claim 7 or 8, wherein the second irradiation unit is provided at two or more locations orthogonal to the optical axis of the optical lens and facing each other. A chart unit that irradiates the image sensor with a test pattern through the optical lens,
With more
The camera module manufacturing apparatus according to any one of claims 7 to 9, wherein the camera module is manufactured. The adjustment unit according to any one of claims 7 to 10, wherein the adjusting unit moves the lens unit in the X, Y, Z, X-axis rotation direction and the Y-axis rotation direction to adjust the position. Camera module manufacturing equipment. A lens provided between the chart unit and the lens unit,
The camera module manufacturing apparatus according to claim 10 or 11, further comprising the chart unit, the lens, and a light source for outputting light passing through the lens unit. The apparatus for manufacturing a camera module according to any one of claims 7 to 12, further comprising a camera for acquiring a coating state of the delayed curing type UV adhesive irradiated with the first UV light. A step of applying a delayed curing type UV adhesive to the adhesive coating surface of an optical element portion having a light receiving element or a light emitting element and an adhesive coating surface.
A step of irradiating the delayed curing type UV adhesive applied to the adhesive-coated surface with a first UV light,
A step of adhering a lens portion having an optical lens and the optical element portion via the delayed curing type UV adhesive irradiated with the first UV light.
A step of irradiating the delayed curing UV adhesive that adheres the lens portion and the optical element portion with a second UV light,
A method for manufacturing an optical module, which comprises. The amount of light of the first UV light is the amount of light that initiates the reaction of the delayed-curing UV adhesive applied to the adhesive-coated surface.
The manufacture of the optical module according to claim 14, wherein the amount of light of the second UV light is larger than the amount of light of the first UV light and is the amount of light that cures the delayed-curing UV adhesive. Method. The method for manufacturing an optical module according to claim 14 or 15, wherein the second UV light is emitted from two or more opposite locations in parallel with the adhesive-coated surface. Between the step of irradiating the first UV light and the step of adhering.
It has a step of acquiring the application status of the delayed curing type UV adhesive irradiated with the first UV light.
If the acquired result is not the predetermined reference value of the coating state, the process of irradiating the second UV light is not performed.
If the acquired result is the reference value, the process proceeds to the step of irradiating the second UV light.
The method for manufacturing an optical module according to any one of claims 14 to 16, wherein the optical module is manufactured.

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