WO2020137964A1 - Temperature sensor - Google Patents

Abstract

A temperature sensor (100) is provided with a temperature sensor element (10), a first lead wire (20a), a second lead wire (20b), and a third insulation member (30). The temperature sensor element (10) includes a first terminal electrode (12a) and a second terminal electrode (12b). The first terminal electrode (12a) and a first surface (P1a) of a first end portion (Ea) are connected to each other via one of two connection members (S). The second terminal electrode (12b) and a first surface (P1b) of a second end portion (Eb) are connected to each other via the other of the two connection members (S). A third surface (P3a) of the first end portion (Ea) and a third surface (P3b) of the second end portion (Eb) oppose each other. The temperature sensor element (10), the connection members (S), and a region not covered with the connection members (S) of the first end portion (Ea) and the second end portion (Eb) are covered with the third insulation member (30).

Description

Temperature sensor

This disclosure relates to a temperature sensor that uses a thermistor as a temperature sensor element.

An example of a temperature sensor using a thermistor as a temperature sensor element is a temperature sensor described in International Publication No. 2008/156082 (Patent Document 1). FIG. 17 is a partial cross-sectional view of the temperature sensor described in Patent Document 1. The temperature sensor 500 includes a temperature sensor element 510, two lead wires 520a and 520b arranged in parallel, and an insulating member 530 that seals a part of each of the temperature sensor element 510 and the lead wires 520a and 520b. ing.

The lead wire 520a includes a metal wire 521a and an insulating member 522a that covers the metal wire 521a. The lead wire 520b includes a metal wire 521b and an insulating member 522b that covers the metal wire 521b. One terminal electrode of the temperature sensor element 510 is connected to the metal wire 521a of the lead wire 520a by the connecting member S, and the other terminal electrode is connected to the metal wire 521b of the lead wire 520b by the connecting member S.

International Publication No. 2008/156082

In the temperature sensor 500 described in Patent Document 1, the distance between the connecting member S connecting one terminal electrode and the metal wire 521a and the connecting member S connecting the other terminal electrode and the metal wire 521b is the temperature. It corresponds to the distance between one terminal electrode and the other terminal electrode of the sensor element 510 and the distance between the metal wire 521a and the metal wire 521b, respectively. That is, particularly when the temperature sensor element 510 is small and the distance between the one terminal electrode and the other terminal electrode is narrow, the distance between the metal wire 521a and the metal wire 521b and the distance between the one terminal electrode and the metal wire 521a are connected. The distance between the connecting member S and the connecting member S that connects the other terminal electrode and the metal wire 521b is also narrowed. In such a case, if the lead wires 520a and 520b are adjacent to each other, the above-mentioned two connecting members S may come into contact with each other and short-circuit between the two terminal electrodes of the temperature sensor element 510.

Further, in the temperature sensor 500 described in Patent Document 1, when the insulating member 530 is formed using the liquid insulating resin material, the insulating resin material is not sufficiently filled between the two connecting members S. A space may be formed between the two connecting members S. On the other hand, the temperature sensor 500 may be exposed to an atmosphere having a temperature higher than the melting point of the connection member S, for example, in a manufacturing process of an electronic device in which the temperature sensor 500 is mounted. In that case, when the temperature sensor 500 in which a gap is formed between the two connection members S having a narrow interval is exposed to an atmosphere having a temperature higher than the melting point of the connection member S, the connection member S is melted and the melted connection is made. There is a possibility that the member S may move in the gap and the two connecting members S may contact each other, causing a short circuit between the two terminal electrodes.

That is, an object of this disclosure is to provide a temperature sensor capable of suppressing a short circuit between the first terminal electrode and the second terminal electrode of the temperature sensor element.

A first aspect of the temperature sensor according to the present disclosure includes a temperature sensor element, a first lead wire, a second lead wire, and a third insulating member. The temperature sensor element includes a first terminal electrode and a second terminal electrode. The first lead wire includes a first metal wire and a first insulating member. The first metal wire has a first end. The first insulating member covers the first metal wire. The first end of the first lead wire is exposed. The first end portion includes a first surface that is an end surface, a second surface that is different from the first surface, and a third surface that connects the first surface and the second surface to each other. .. The first terminal electrode and the first surface of the first end are connected to each other by one of the two connecting members. The second lead wire includes a second metal wire and a second insulating member. The second metal wire has a second end. The second insulating member covers the second metal wire. The second end of the second lead wire is exposed. The second end portion includes a first surface that is an end surface, a second surface that is different from the first surface, and a third surface that connects the first surface and the second surface to each other. There is. The second terminal electrode and the first surface of the second end are connected to each other by another one of the two connecting members. The third surface of the first end and the third surface of the second end face each other. The temperature sensor element, the connecting member, and the regions of the first end portion and the second end portion that are not covered with the connecting member are covered with the third insulating member.

A second aspect of the temperature sensor according to the present disclosure includes a temperature sensor element, a first lead wire, a second lead wire, and a third insulating member. The temperature sensor element includes a first terminal electrode and a second terminal electrode. The first lead wire includes a first metal wire and a first insulating member. The first metal wire has a first end. The first insulating member covers the first metal wire. The first end of the first lead wire is exposed. The first end portion includes a first surface that is an end surface and a second surface that is different from the first surface. The first terminal electrode and the first surface of the first end are connected to each other by one of the two connecting members. The second lead wire includes a second metal wire and a second insulating member. The second metal wire has a second end. The second insulating member covers the second metal wire. The second end of the second lead wire is exposed. The second end portion includes a first surface that is an end surface and a second surface that is different from the first surface. The second terminal electrode and the first surface of the second end are connected to each other by another one of the two connecting members. When the first end and the second end are viewed in a plan view, the distance between the first surface of the first end and the first surface of the second end is equal to that of the first end. The distance between the second surface and the second surface of the second end is wider. The temperature sensor element, the connecting member, and the regions of the first end portion and the second end portion that are not covered with the connecting member are covered with the third insulating member.

The temperature sensor according to this disclosure can suppress a short circuit between the first terminal electrode and the second terminal electrode of the temperature sensor element.

It is a top view of the temperature sensor of the 1st Embodiment of this invention. FIG. 2A is a plan view of the temperature sensor of the first embodiment, in which the portion surrounded by the alternate long and short dash line in FIG. 1 is enlarged and the third insulating member is seen through. FIG. 2B is a top view of the temperature sensor according to the first embodiment, with the third insulating member seen through. FIG. 3 is a cross-sectional view of the temperature sensor of the first embodiment taken along the line III-III shown in FIG. It is an external appearance perspective view which expanded the 1st edge part of the 1st lead wire of the temperature sensor of 1st Embodiment. It is a top view of the temperature sensor of the 1st modification of 1st Embodiment. It is a top view of the temperature sensor of the 2nd modification of 1st Embodiment. It is a top view of the temperature sensor of the 3rd modification of 1st Embodiment. FIG. 8 is a cross-sectional view of the temperature sensor 100 of a third modification example of the first embodiment taken along the line VIII-VIII shown in FIG. It is a top view of the temperature sensor of the 4th modification of 1st Embodiment. It is a top view of the temperature sensor of the 5th modification of 1st Embodiment. FIG. 11 is a cross-sectional view of the temperature sensor of the fifth modification example of the first embodiment taken along the line XI-XI shown in FIG. It is an external appearance perspective view which expanded the 1st edge part of the 1st lead wire of the temperature sensor of the 5th modification of 1st Embodiment. It is a top view of the temperature sensor of the 2nd Embodiment of this invention. It is a top view of the temperature sensor of the modification of a 2nd embodiment. It is a top view of the temperature sensor of the 3rd Embodiment of this invention. It is a top view of the temperature sensor of the 4th Embodiment of this invention. It is a partial cross section figure of the temperature sensor of background art.

The features of this disclosure will be described with reference to the drawings. In the schematic form of the temperature sensor shown below, the same or common portions are denoted by the same reference numerals in the drawings, and the description thereof may not be repeated.

-First embodiment-
The temperature sensor according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

FIG. 1 is a plan view of a temperature sensor according to the first embodiment of this invention. FIG. 2A is a plan view of the temperature sensor in which the portion surrounded by the alternate long and short dash line in FIG. 1 is enlarged and a third insulating member described later is seen through. FIG. 2B is a top view of the temperature sensor in which a third insulating member described later is seen through. In FIG. 2(A) and FIG. 2(B), the 3rd insulating member 30 is represented by the broken line. FIG. 3 is a cross-sectional view of the temperature sensor taken along the line III-III shown in FIG. FIG. 4 is an enlarged perspective view of the first end of the first lead wire of the temperature sensor.

The temperature sensor 100 includes a temperature sensor element 10, a first lead wire 20a including a first metal wire 21a and a first insulating member 22a, a first lead wire 20a including a second metal wire 21b and a second insulating member 22b. The second lead wire 20b and the third insulating member 30 are provided.

As shown in FIG. 3, the temperature sensor element 10 includes a rectangular parallelepiped laminated type thermistor element 11 in which ceramic layers 11a made of semiconductor and internal electrodes 11b are alternately laminated, a first terminal electrode 12a, and a first terminal electrode 12a. Two terminal electrodes 12b. The first terminal electrode 12a is provided from one end surface of the thermistor element 11 to the four side surfaces. The second terminal electrode 12b is provided from the other end surface of the thermistor element 11 to the four side surfaces.

The ceramic layer 11a is formed of a known PTC thermistor material or NTC thermistor material. The internal electrode 11b is formed of a known metal material such as Ni or Ag—Pd alloy.

In the first lead wire 20a, the first metal wire 21a has a first end Ea. The first insulating member 22a covers the first metal wire 21a so that the first end Ea is exposed. As shown in FIGS. 2 and 4, the first end portion Ea includes a first surface P1a which is an end surface, a second surface P2a different from the first surface P1a, and the first surface P1a and the second surface P1a. And a third surface P3a that connects the first surface P2a with the second surface P2a.

Similarly, in the second lead wire 20b, the second metal wire 21b has the second end Eb. The second insulating member 22b covers the second metal wire 21b so that the second end Eb is exposed. As shown in FIG. 2, the second end portion Eb includes a first surface P1b which is an end surface, a second surface P2b different from the first surface P1b, and the first surface P1b and the second surface P2b. And has a third surface P3b that connects to each other.

The first metal wire 21a and the second metal wire 21b are formed of a known metal material such as Cu. The first insulating member 22a and the second insulating member 22b are formed of a known resin material such as polyurethane.

The first terminal electrode 12a and the first surface P1a of the first end Ea are connected to each other by the connecting member S. The second terminal electrode 12b and the first surface P1b of the second end portion Eb are connected to each other by the connecting member S. In this way, the first terminal electrode 12a and the first metal wire 21a of the first lead wire 20a are electrically connected to each other by one of the two connecting members S, and the second The terminal electrode 12b and the second metal wire 21b of the second lead wire 20b are electrically connected to each other by another one of the two connecting members S. The third surface P3a of the first end Ea and the third surface P3b of the second end Eb are opposed to each other. The first terminal electrode 12a may be connected to the first surface P1a and the third surface P3a of the first end portion Ea by one of the two connecting members S, and The second terminal electrode 12b may be connected to the first surface P1b and the third surface P3b of the second end Eb by another one of the two connecting members S.

As shown in FIG. 2, when the first end portion Ea and the second end portion Eb are viewed in a plan view, the first surface P1a of the first end portion Ea and the first surface of the second end portion Eb. The distance D1 from P1b is wider than the distance D2 from the second surface P2a of the first end Ea and the second surface P2b of the second end Eb.

For the connecting member S, for example, solder such as Sn—Ag—Cu alloy can be used. Here, the interval D1 is the first surface P1a of the first end Ea and the first surface of the second end Eb when the first end Ea and the second end Eb are viewed in a plan view. It is the distance between the point in the first surface P1a and the point in the first surface P1b, which is the shortest distance from P1b. Further, the spacing D2 is such that the second surface P2a of the first end Ea and the second surface P2b of the second end Eb when the first end Ea and the second end Eb are viewed in a plan view. It is the distance between the point in the second plane P2a and the point in the second plane P2b, which is the shortest distance between and.

The temperature sensor element 10, the connecting member S, a part of the first lead wire 20a, and a part of the second lead wire 20b are covered with the third insulating member 30. At that time, of the first lead wire 20a and the second lead wire 20b, at least the regions of the first end portion Ea and the second end portion Eb which are not covered with the connecting member S are the third insulating layer. It is covered by the member 30.

For the third insulating member 30, for example, an insulating resin material such as epoxy resin, acrylic resin, urethane resin, silicone resin, ethylene resin can be used.

In the temperature sensor 100, the distance between the two connecting members S may be wider than the distance D2 between the second surface P2a of the first end Ea and the second surface P2b of the second end Eb. it can. Accordingly, it is possible to suppress a short circuit between the first terminal electrode 12a and the second terminal electrode 12b due to the contact of the two connecting members S.

Further, in the temperature sensor 100, the distance between the two connecting members S is wider than the distance D2. Therefore, when the third insulating member 30 is formed using the liquid insulating resin material, The insulating resin material is sufficiently filled in the space, and the generation of voids can be suppressed. That is, even if the temperature sensor 100 is exposed to an atmosphere having a temperature higher than the melting point of the connection member S, the movement of the melted connection member S can be suppressed.

Therefore, since the temperature sensor element 10 is small, even if the distance between the first terminal electrode 12a and the second terminal electrode 12b is narrow and the first lead wire 20a and the second lead wire 20b are adjacent to each other, The contact between the two connecting members S is suppressed, and a short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be suppressed.

In the temperature sensor 100, the first surface P1a at the first end Ea of the first metal wire 21a is inclined with respect to the virtual surface IP1 orthogonal to the axis of the first metal wire 21a. There is. The second plane P2a is parallel to the virtual IP1 plane. The third surface P3a is parallel to the axial direction of the first metal wire 21a. As shown in FIG. 2, in the temperature sensor 100, the angle θ1 formed by the first surface P1a and the third surface P3a of the first end portion Ea is an obtuse angle.

Similarly, the first surface P1b at the second end Eb of the second metal wire 21b is inclined with respect to the virtual surface IP2 orthogonal to the axis of the second metal wire 21b. The second plane P2b is parallel to the virtual plane IP2. The third surface P3b is parallel to the axial direction of the second metal wire 21b. Then, as shown in FIG. 2, the angle θ2 formed by the first surface P1b and the third surface P3b of the second end portion Eb is an obtuse angle. In the temperature sensor 100, the second surface P2a of the first end portion Ea and the second surface P2b of the second end portion Eb are on the same plane.

Since the first surface P1a of the first end portion Ea is inclined with respect to the virtual surface IP1, as compared with the case where the first surface P1a is not inclined with respect to the virtual surface IP1. The volume of the connecting member S protruding from between the first terminal electrode 12a and the first surface P1a of the first end portion Ea can be reduced. Since the first surface P1b of the second end portion Eb is inclined with respect to the virtual surface IP2, compared with the case where the first surface P1b is not inclined with respect to the virtual surface IP2. The volume of the connecting member S protruding from between the second terminal electrode 12b and the first surface P1b of the second end portion Eb can be reduced. That is, a short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be further suppressed.

Further, since the first surface P1a of the first end portion Ea is inclined with respect to the virtual surface IP1, the first surface P1a is not inclined with respect to the virtual surface IP1. In comparison, the contact area between the first surface P1a and one of the two connecting members S can be increased. Since the first surface P1b of the second end portion Eb is inclined with respect to the virtual surface IP2, compared with the case where the first surface P1b is not inclined with respect to the virtual surface IP2. , The contact area between the first surface P1b and the other one of the two connecting members S can be increased. That is, it is possible to improve the connection strength between the first terminal electrode 12a and the first metal wire 21a of the temperature sensor element 10 and the connection strength between the second terminal electrode 12b and the second metal wire 21b.

Further, since the angle θ1 formed by the first surface P1a and the third surface P3a of the first end portion Ea is an obtuse angle, one of the two connecting members S is placed on the first terminal electrode 12a. Can be suppressed. Since the angle θ2 formed by the first surface P1b and the third surface P3b of the second end portion Eb is an obtuse angle, the other one of the two connecting members S, the second terminal electrode 12b Can be suppressed.

The angle θ1 formed by the first surface P1a and the third surface P3a of the first end Ea and the angle θ2 formed by the first surface P1b and the third surface P3b of the second end Eb. Are preferably equal to each other in order to balance the surface tension when the connecting member S is melted.

Further, as shown in FIG. 1, in the temperature sensor 100, the first lead wire 20a and the second lead wire 20b have portions PP that are adjacent to each other in parallel. In this case, even if each of the first lead wire 20a and the second lead wire 20b has a small diameter of, for example, 0.2 mm to 0.5 mm, by adjoining each other in parallel, The rigidity can be increased.

-First Modification of First Embodiment-
A temperature sensor of a first modification of the first embodiment of the present invention will be described with reference to FIG.

FIG. 5 is a plan view of a temperature sensor of a first modified example of the first embodiment. Similar to FIG. 2A, FIG. 5 is a plan view of the temperature sensor 100A through which the third insulating member 30 is seen. In the temperature sensor 100A, the first end portion Ea has the third surface P3a and the second surface P2a in addition to the first surface P1a, the second surface P2a, and the third surface P3a. It is a stepped shape including a plane parallel to the axial direction of the first metal wire 21a and a plane parallel to the virtual IP1 plane, which are connected to each other. The second end portion Eb connects the third surface P3b and the second surface P2b to each other in addition to the first surface P1b, the second surface P2b, and the third surface P3b. It is a step shape including a plane parallel to the axial direction of the second metal wire 21b and a plane parallel to the virtual IP2 plane. The other configurations are similar to those of the temperature sensor 100, and detailed description thereof will be omitted.

In the temperature sensor 100A as well, like the temperature sensor 100, contact between the two connecting members S is suppressed, and a short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be suppressed.

-Second Modification of First Embodiment-
The temperature sensor of the second modification of the first embodiment of the present invention will be described with reference to FIG.

FIG. 6 is a plan view of a temperature sensor of a second modified example of the first embodiment. Similar to FIG. 2A, FIG. 6 is a plan view of the temperature sensor 100B with the third insulating member 30 seen through. As shown in FIG. 6, in the temperature sensor 100B, the second surface P2a of the first end portion Ea is inclined with respect to the virtual surface IP1 orthogonal to the axis of the first metal wire 21a. There is. Similarly, the second surface P2b of the second end Eb is inclined with respect to the virtual surface IP2 that is orthogonal to the axis of the second metal wire 21b. The other configurations are similar to those of the temperature sensor 100, and detailed description thereof will be omitted.

In the temperature sensor 100B as well, like the temperature sensor 100, contact between the two connecting members S is suppressed, and a short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be suppressed. In the temperature sensor 100B, the angle θ3 formed by the second surface P2a and the third surface P3a of the first end Ea, and the second surface P2b and the third surface P3b of the second end Eb. The angle θ4 formed by and is an obtuse angle, but may be an acute angle.

-Third modification of the first embodiment-
A temperature sensor according to a third modification of the first embodiment of the present invention will be described with reference to FIGS. 7 and 8.

FIG. 7 is a plan view of a temperature sensor of a third modified example of the first embodiment. Similarly to FIG. 2A, FIG. 7 is a plan view of the temperature sensor 100C through the third insulating member 30. 8 is a cross-sectional view of the temperature sensor of the third modification example of the first embodiment taken along the line VIII-VIII shown in FIG. As shown in FIGS. 7 and 8, in the temperature sensor 100C, the second surface P2a of the first end Ea and the second surface P2b of the second end Eb are not on the same plane. That is, the virtual surface IP3 including the second surface P2a of the first end portion Ea is a portion other than the intersection of the third surface P3b of the second end portion Eb and the second surface P2b. Crossing The other configurations are similar to those of the temperature sensor 100, and detailed description thereof will be omitted.

In the temperature sensor 100C as well, like the temperature sensor 100, contact between the two connecting members S is suppressed, and a short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be suppressed. Further, since the second surface P2a of the first end Ea and the second surface P2b of the second end Eb are not on the same plane, at least one of the second surface P2a and the second surface P2b Even if the connecting member S reaches the surface of (1), a short circuit between the first terminal electrode 12a and the second terminal electrode 12b due to contact between the two connecting members S can be further suppressed.

Also in this case, as shown in FIG. 7, when the first end Ea and the second end Eb are viewed in a plan view, the first surface P1a and the second end Eb of the first end Ea are viewed. The distance D1 from the first surface P1b is the distance between the second surface P2a of the first end Ea and the second surface P2b of the second end Eb in the in-plane direction of the virtual surface IP3. Wider than D2.

-Fourth modification of the first embodiment-
A temperature sensor according to a fourth modification of the first embodiment of the present invention will be described with reference to FIG.

FIG. 9 is a plan view of a temperature sensor of a fourth modified example of the first embodiment. Similarly to FIG. 2A, FIG. 9 is a plan view of the temperature sensor 100D with the third insulating member 30 seen through. As shown in FIG. 9, in the temperature sensor 100D, the first surface P1a at the first end Ea of the first metal wire 21a is a virtual surface orthogonal to the axis of the first metal wire 21a. Not inclined to. Similarly, the first surface P1b at the second end Eb of the second metal wire 21b is not inclined with respect to a virtual surface orthogonal to the axis of the second metal wire 21b. The other configurations are similar to those of the temperature sensor 100, and detailed description thereof will be omitted.

In the temperature sensor 100D as well, like the temperature sensor 100, the contact between the two connecting members S is suppressed, and the short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be suppressed.

-Fifth Modification of First Embodiment-
A temperature sensor that is a fifth modification of the first embodiment of the present invention will be described with reference to FIGS. 10 to 12.

FIG. 10 is a plan view of a temperature sensor of a fifth modified example of the first embodiment. Similarly to FIG. 2A, FIG. 10 is a plan view of the temperature sensor 100E through the third insulating member 30. FIG. 11 is a cross-sectional view of the temperature sensor of the fifth modification example of the first embodiment taken along the line XI-XI shown in FIG. In addition, FIG. 12 is an external perspective view in which the first end portion of the first lead wire of the temperature sensor of the fifth modified example of the first embodiment is enlarged.

As shown in FIGS. 10 to 12, in the temperature sensor 100E, the first surface P1a at the first end Ea of the first metal wire 21a is the same as the temperature sensor 100 in the first metal wire 21a. It is inclined with respect to a virtual plane IP1 orthogonal to the axis. However, in the temperature sensor 100E, the angle θ1 formed by the first surface P1a and the third surface P3a of the first end portion Ea is an acute angle.

As shown in FIG. 10, in the temperature sensor 100E, like the temperature sensor 100, the first surface P1b at the second end Eb of the second metal wire 21b is different from the axis of the second metal wire 21b. And is inclined with respect to the virtual plane IP2 orthogonal to each other. The angle θ2 formed by the first surface P1b and the third surface P3b of the second end portion Eb is an acute angle. The other configurations are similar to those of the temperature sensor 100, and detailed description thereof will be omitted.

In the temperature sensor 100E as well, like the temperature sensor 100, contact between the two connecting members S is suppressed, and a short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be suppressed.

Further, in the temperature sensor 100E, the first surface P1a of the first end portion Ea is inclined with respect to the virtual surface IP1, so that the first surface P1a is inclined with respect to the virtual surface IP1. One of the two connecting members S protruding to the center side of the temperature sensor element 10 from between the first terminal electrode 12a and the first surface P1a of the first end portion Ea as compared with the case where it is not formed. One volume can be further reduced. Since the first surface P1b of the second end portion Eb is inclined with respect to the virtual surface IP2, compared with the case where the first surface P1b is not inclined with respect to the virtual surface IP2. , The volume of the other one of the two connecting members S protruding to the center side of the temperature sensor element 10 from between the second terminal electrode 12b and the first surface P1b of the second end portion Eb is further reduced. can do. That is, a short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be further suppressed. Further, since the first surface P1a of the first end portion Ea is inclined with respect to the virtual surface IP1, the first surface P1a is not inclined with respect to the virtual surface IP1. In comparison, the contact area between the first surface P1a and one of the two connecting members S can be increased. Since the first surface P1b of the second end portion Eb is inclined with respect to the virtual surface IP2, compared with the case where the first surface P1b is not inclined with respect to the virtual surface IP2. , The contact area between the first surface P1b and the other one of the two connecting members S can be increased. That is, it is possible to improve the connection strength between the first terminal electrode 12a and the first metal wire 21a of the temperature sensor element 10 and the connection strength between the second terminal electrode 12b and the second metal wire 21b.

The angle θ1 formed by the first surface P1a and the third surface P3a of the first end Ea and the angle θ2 formed by the first surface P1b and the third surface P3b of the second end Eb. Are preferably equal to each other in order to balance the surface tension when the connecting member S is melted.

-Second Embodiment-
A temperature sensor according to the second embodiment of the present invention will be described with reference to FIG.

FIG. 13 is a plan view of the temperature sensor according to the second embodiment of this invention. Similar to FIG. 2A, FIG. 13 is a plan view of the temperature sensor 200 with the third insulating member 30 seen through. In the temperature sensor 200, the first end Ea of the first metal wire 21a includes a first surface P1a that is an end surface and a second surface P2a that is different from the first surface P1a. The second end Eb of the second metal wire 21b includes a first surface P1b that is an end surface and a second surface P2b that is different from the first surface P1b.

As shown in FIG. 13, when the first end Ea and the second end Eb are viewed in a plan view, the first surface P1a of the first end Ea and the first surface P2 of the second end Eb. The distance D1 from P1b is wider than the distance D2 from the second surface P2a of the first end Ea and the second surface P2b of the second end Eb. The other configurations are similar to those of the temperature sensor 100, and detailed description thereof will be omitted.

In the temperature sensor 200 as well, similar to the temperature sensor 100, the distance between the two connecting members S is set to the distance between the second surface P2a of the first end Ea and the second surface P2b of the second end Eb. It can be wider than D2. Thereby, the short circuit between the first terminal electrode 12a and the second terminal electrode 12b due to the contact between the two connecting members S can be suppressed.

Further, also in the temperature sensor 200, the distance between the two connecting members is wider than the distance D2. Therefore, when the third insulating member 30 is formed using the liquid insulating resin material, The insulating resin material is sufficiently filled in the space, and the generation of voids can be suppressed. That is, even if the temperature sensor 200 is exposed to the atmosphere having a temperature higher than the melting point of the connection member S, the movement of the melted connection member S can be suppressed.

Therefore, since the temperature sensor element 10 is small, even if the distance between the first terminal electrode 12a and the second terminal electrode 12b is narrow and the first lead wire 20a and the second lead wire 20b are adjacent to each other, The contact between the two connecting members S is suppressed, and a short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be suppressed.

-Modification of the second embodiment-
A temperature sensor of a modified example of the second embodiment of the present invention will be described with reference to FIG.

FIG. 14 is a plan view of a temperature sensor of a modified example of the second embodiment. Similarly to FIG. 2A, FIG. 14 is a plan view of the temperature sensor 200A through which the third insulating member 30 is seen. In the temperature sensor 200A, both the second surface P2a of the first end portion Ea and the second surface P2b of the second end portion Eb are curved surfaces. The other configurations are similar to those of the temperature sensor 200, and detailed description thereof will be omitted.

Also in the temperature sensor 200A, like the temperature sensors 100 and 200, the contact between the two connecting members S is suppressed, and the short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be suppressed.

-Third Embodiment-
A temperature sensor according to the third embodiment of the present invention will be described with reference to FIG.

FIG. 15 is a plan view of a temperature sensor according to the third embodiment of the present invention. Similarly to FIG. 2A, FIG. 15 is a plan view of the temperature sensor 300 with the third insulating member 30 seen through. The temperature sensor element 10 in the temperature sensor 300 includes a rectangular parallelepiped thermistor element 11 including one ceramic layer made of a semiconductor, a first terminal electrode 12a, and a second terminal electrode 12b. The other configurations are similar to those of the temperature sensor 100, and detailed description thereof will be omitted.

In the temperature sensor 300 as well, similar to the temperature sensor 100, the distance between the two connecting members S is set to the distance between the second surface P2a of the first end Ea and the second surface P2b of the second end Eb. It can be wider than D2. Thereby, the short circuit between the first terminal electrode 12a and the second terminal electrode 12b due to the contact between the two connecting members S can be suppressed.

Further, also in the temperature sensor 300, the distance between the two connecting members is wider than the distance D2. Therefore, when the third insulating member 30 is formed by using the liquid insulating resin material, the two connecting members S are separated from each other. The insulating resin material is sufficiently filled in the space, and the generation of voids can be suppressed. That is, even if the temperature sensor 100 is exposed to an atmosphere having a temperature higher than the melting point of the connection member S, the movement of the melted connection member S can be suppressed.

Therefore, since the temperature sensor element 10 is small, even if the distance between the first terminal electrode 12a and the second terminal electrode 12b is narrow and the first lead wire 20a and the second lead wire 20b are adjacent to each other, The contact between the two connecting members S is suppressed, and a short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be suppressed.

-Fourth Embodiment-
A temperature sensor according to the fourth embodiment of the present invention will be described with reference to FIG.

FIG. 16 is a plan view of a temperature sensor according to the fourth embodiment of the present invention. Similar to FIG. 2A, FIG. 16 is a plan view of the temperature sensor 400 through which the third insulating member 30 is seen. The temperature sensor element 10 in the temperature sensor 400 includes a thermistor element 11 having a rectangular parallelepiped shape, a first terminal electrode 12a and a second terminal electrode 12b. The thermistor element 11 may be a laminated type thermistor element in which ceramic layers made of semiconductor and internal electrodes are alternately laminated, or may be a thermistor element including one ceramic layer made of semiconductor. The other configurations are similar to those of the temperature sensor 100, and detailed description thereof will be omitted.

In the temperature sensor 400 as well, similar to the temperature sensor 100, the distance between the two connecting members S is set to the distance between the second surface P2a of the first end Ea and the second surface P2b of the second end Eb. It can be wider than D2. Thereby, the short circuit between the first terminal electrode 12a and the second terminal electrode 12b due to the contact between the two connecting members S can be suppressed.

Also in the temperature sensor 400, the distance between the two connecting members is wider than the distance D2. Therefore, when the third insulating member 30 is formed using the liquid insulating resin material, the two connecting members S The insulating resin material is sufficiently filled in the space, and the generation of voids can be suppressed. That is, even if the temperature sensor 400 is exposed to an atmosphere having a temperature higher than the melting point of the connection member S, the movement of the melted connection member S can be suppressed.

Therefore, since the temperature sensor element 10 is small, even if the distance between the first terminal electrode 12a and the second terminal electrode 12b is narrow and the first lead wire 20a and the second lead wire 20b are adjacent to each other, The contact between the two connecting members S is suppressed, and a short circuit between the first terminal electrode 12a and the second terminal electrode 12b can be suppressed.

The embodiment disclosed in this specification is an exemplification, and the invention according to this disclosure is not limited to the above embodiment and modification. That is, the scope of the invention according to this disclosure is shown by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope. Further, various applications and modifications can be added within the above range.

The invention according to this disclosure can be applied to a temperature sensor used to detect, for example, body temperature, battery temperature of a mobile device, engine temperature of an automobile, and the like. However, the present invention is not limited to these, and can be applied to various temperature sensors.

100 temperature sensor 10 temperature sensor element 11 thermistor element 12a first terminal electrode 12b second terminal electrode 20a first lead wire 21a first metal wire 22a first insulating member Ea first end P1a first Surface P2a second surface P3a third surface 20b second lead wire 21b second metal wire 22b second insulating member Eb second end P1b first surface P2b second surface P3b third surface 30 Third Insulation Member S Connection Member

Claims (9)

A temperature sensor element including a first terminal electrode and a second terminal electrode;
A first lead wire that includes a first metal wire having a first end and a first insulating member that covers the first metal wire, and has the first end exposed.
A second lead wire that includes a second metal wire having a second end portion and a second insulating member that covers the second metal wire, and has the second end portion exposed.
A third insulating member,
The first end is a first surface that is an end surface, a second surface different from the first surface, and a third surface that connects the first surface and the second surface to each other. Including,
The second end portion has a first surface that is an end surface, a second surface different from the first surface, and a third surface that connects the first surface and the second surface to each other. Including and
The first terminal electrode and the first surface of the first end are connected to each other by one of two connecting members,
The second terminal electrode and the first surface of the second end are connected to each other by one of the two connecting members,
A third surface of the first end and a third surface of the second end face each other,
The temperature sensor element, the connecting member, and the regions of the first end portion and the second end portion that are not covered by the connecting member are covered by the third insulating member. , Temperature sensor. When the first end portion and the second end portion are viewed in plan, the distance between the first surface of the first end portion and the first surface of the second end portion is the first The temperature sensor according to claim 1, wherein the temperature sensor is wider than the distance between the second surface of the end of the and the second surface of the second end. Of the two connection members that connect the first terminal electrode and the first surface of the first end when the first end and the second end are viewed in a plan view One of the two connecting members that connects the second terminal electrode and the first surface of the second end portion with a distance between the first end portion and The temperature sensor according to claim 2, wherein the temperature sensor is wider than a distance between the second surface of the second surface and the second surface of the second end portion. The first surface of the first end portion is inclined with respect to a virtual surface orthogonal to the axis of the first metal wire,
4. The first surface of the second end portion is inclined with respect to an imaginary surface orthogonal to the axis of the second metal wire, according to claim 1. Temperature sensor. The temperature sensor according to claim 4, wherein an angle formed by the first surface of the first end portion and the third surface of the first end portion is an obtuse angle. The temperature sensor according to claim 4, wherein an angle formed by the first surface of the first end and the third surface of the first end is an acute angle. The virtual surface including the second surface of the first end portion does not include the line of intersection of the third surface of the second end portion and the second surface of the second end portion. 7. The temperature sensor according to any one of claims 1 to 6, which intersects the portion. A temperature sensor element including a first terminal electrode and a second terminal electrode;
A first lead wire that includes a first metal wire having a first end and a first insulating member that covers the first metal wire, and has the first end exposed.
A second lead wire that includes a second metal wire having a second end portion and a second insulating member that covers the second metal wire, and has the second end portion exposed.
A third insulating member,
The first end portion includes a first surface that is an end surface, and a second surface different from the first surface,
The second end portion includes a first surface that is an end surface and a second surface that is different from the first surface,
The first terminal electrode and the first surface of the first end are connected to each other by one of two connecting members,
The second terminal electrode and the first surface of the second end are connected to each other by one of the two connecting members,
When the first end portion and the second end portion are viewed in plan, the distance between the first surface of the first end portion and the first surface of the second end portion is the first Wider than the distance between the second surface of the end of the and the second surface of the second end,
The temperature sensor element, the connecting member, and the regions of the first end portion and the second end portion that are not covered by the connecting member are covered by the third insulating member. , Temperature sensor. The temperature sensor according to any one of claims 1 to 8, wherein the first lead wire and the second lead wire have parallel and adjacent portions.

Images