JPWO2020110295A1 - Electrical contacts and their manufacturing methods - Google Patents

Abstract

An electric contactor capable of suppressing deterioration of the joint between the contact and the base metal is obtained. This electric contact is joined to the base metal through a base metal formed in a plate shape and having through holes in the plate thickness direction, a joining material provided on the first surface of the base metal, and a joining material. The contact point is integrally formed with the first flange portion and the first flange portion provided inside the joint material facing the first surface, and is integrally formed with the leg portion and the leg portion inserted into the through hole. A rivet having a second flange portion facing the second surface of the base metal is provided, and the joining material is pressed against the first surface by the rivet.

Description

The present invention relates to an electrical contact whose contacts are joined to a base metal and a method for manufacturing the same.

Conventionally, an electric contact having a base metal, a joining material provided on the base metal, and a contact point joined to the base metal via the joining material is known (see, for example, Patent Document 1). Further, conventionally, a base metal having through holes formed in the plate thickness direction, a joining material provided on the base metal, and a flange portion joined to the base metal via a leg portion and a joining material inserted into the through hole. There is known an electrical contactor provided with a rivet having a rivet and a contact provided on the collar of the rivet (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2014-232617 Japanese Unexamined Patent Publication No. 2016-20780

However, in the electric contact described in Patent Document 1, the peripheral portion of the bonding material may be peeled off from the base metal due to the use of the electric contact. In this case, there is a problem that the joint between the contact and the base metal deteriorates. In the electric contact described in Patent Document 2, the peripheral portion of the contact may be peeled off from the collar portion of the rivet due to the use of the electric contact. In this case, there is a problem that the joint between the contact point via the rivet and the base metal deteriorates.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an electric contactor capable of suppressing deterioration of a bond between a contact and a base metal and a method for manufacturing the same. Is what you do.

The electric contact according to the present invention has a base metal formed in a plate shape and having through holes formed in the plate thickness direction, a joint material provided on the first surface of the base metal, and a base metal via the joint material. It is integrally formed with the first flange portion and the first flange portion provided inside the joint material, facing the first surface, and integrated with the leg portion and the leg portion inserted into the through hole. It is provided with a rivet having a second flange portion facing the second surface of the base metal, and the joining material is pressed against the first surface by the rivet.
The method for manufacturing an electric contact according to the present invention is a method of forming a base metal after a first joining material coating step of applying a first joining material to a first surface of a plate-shaped base metal and a first joining material coating step. After the rivet leg insertion step of inserting the rivet leg into the through hole and superimposing the first flange of the rivet on the first joining material and the rivet leg inserting step, the first flange and the first joining After the second joint material application step of applying the second joint material to the material and arranging the first flange portion between the first joint material and the second joint material, and the second joint material application step, the second The contacts are overlapped on the joint material, and the contacts, the first joint material and the second joint material are compressed and heated in the laminating direction, and the contacts, rivets and It is provided with a contact joining step of joining the base metal to each other, and a leg deformation step of deforming the leg portion after the contact joining step to form a second flange portion facing the second surface of the base metal into a rivet. In the leg deformation step, the joining material is pressed against the first surface by rivets.

According to the electric contactor and the manufacturing method thereof according to the present invention, deterioration of the joint between the contact and the base metal can be suppressed.

It is sectional drawing which shows the electric contact member which concerns on Embodiment 1 of this invention. It is an enlarged view which shows the part A of FIG. It is a flowchart which shows the manufacturing method of the electric contact of FIG. It is a figure which shows the 1st bonding material coating process of FIG. It is a figure which shows the rivet leg insertion process of FIG. It is a figure which shows the 2nd bonding material coating process of FIG. It is a figure which shows the contact joining process of FIG. It is a figure which shows the leg deformation process of FIG. It is sectional drawing which shows the electric contact member which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the electric contact member which concerns on Embodiment 4 of this invention. It is sectional drawing which shows the electric contact member which concerns on Embodiment 5 of this invention. It is sectional drawing which shows the modification of the electric contact of FIG. It is sectional drawing which shows the modification of the electric contact of FIG.

Embodiment 1.
FIG. 1 is a cross-sectional view showing an electrical contactor according to a first embodiment of the present invention. FIG. 2 is an enlarged view showing a part A of FIG. The electric contact according to the first embodiment of the present invention includes a base metal 1, a joining material 2 provided on the base metal 1, a rivet 3 joined to the base metal 1 via the joining material 2, and a joining material. It is provided with a contact 4 joined to the base metal 1 via 2.

The base metal 1 is composed of a copper alloy containing Cu (copper) as a main component. The base metal 1 is formed in a plate shape. The base metal 1 is formed with a through hole 11 that penetrates the base metal 1 in the plate thickness direction. One surface of the base metal 1 is the first surface 12, and the other surface is the second surface 13.

The joining material 2 is superposed on the first surface 12 of the base metal 1. As the bonding material 2, a sintered silver bonding material paste containing Ag nanoparticles, which are Ag (silver) fine particles, is used. Ag fine particles are contained in metal fine particles. The central particle size of Ag nanoparticles is 50 nm.

The rivet 3 faces the first surface 12 and is integrally formed with the first flange portion 31 provided inside the joining member 2 and the first flange portion 31, and the leg portion 32 inserted into the through hole 11. , Which is integrally formed with the leg portion 32 and has a second flange portion 33 facing the second surface 13. When viewed in the plate thickness direction of the base metal 1, the area of the first flange portion 31 is larger than the area of the through hole 11. Therefore, the first flange portion 31 is not inserted into the through hole 11. Further, when viewed in the plate thickness direction of the base metal 1, the area of the second flange portion 33 is larger than the area of the through hole 11. Therefore, the second flange portion 33 is not inserted into the through hole 11.

The second flange portion 33 pushes the base metal 1 toward the joint material 2. As a result, a compressive force P acts on the bonding material 2. In other words, the bonding material 2 is pressed against the first surface 12 by the rivet 3.

The contact 4 contains a main component and an additive. The main component of the contact 4 is Ag. The additives of the contact 4 are an oxide of In (indium) and an oxide of Sn (tin). The contact 4 contains about 1 to 30 wt% of an oxide of In and an oxide of Sn.

Next, a method of manufacturing an electric contactor will be described. FIG. 3 is a flowchart showing a method of manufacturing the electric contact of FIG. First, in step S1, the first bonding material coating step is performed. FIG. 4 is a diagram showing the first bonding material coating step of FIG. In the first bonding material coating step, the first bonding material 21 is applied around the through hole 11 on the first surface 12 of the base metal 1.

The first bonding material 21 is a part of the bonding material 2. The amount of the first bonding material 21 is 1/3 of the amount of the bonding material 2. The dimension of the first bonding material 21 in the thickness direction is about 50 μm.

In the first bonding material coating step, a screen printing machine and a screen printing mask are used. By using the screen printing machine and the screen printing mask, the first bonding material 21 is applied only to the set area in the base metal 1.

As shown in FIG. 3, after step S1, the first heat drying step is performed in step S2. In the first heat drying step, the organic solvent contained in the first bonding material 21 is removed. When the dimension of the first bonding material 21 in the thickness direction is small, the first heat drying step can be omitted.

After step S2, the rivet leg insertion step is performed in step S3. FIG. 5 is a diagram showing a rivet leg insertion step of FIG. In the rivet leg insertion step, the leg portion 32 of the rivet 3 is inserted into the through hole 11 of the base metal 1 from the first surface 12 side, and the first flange portion 31 of the rivet 3 is overlapped with the first joint member 21. In the rivet leg insertion step, a part of the leg 32 of the rivet 3 is projected from the second surface 13 in a direction away from the first surface 12. In the first heat drying step, the organic solvent contained in the first joining material 21 is removed, so that in the rivet leg insertion step, the first joining material 21 becomes the first flange 31 of the rivet 3 and the base metal 1. It is suppressed from being crushed between.

As shown in FIG. 3, after step S3, a second bonding material coating step is performed in step S4. FIG. 6 is a diagram showing a second bonding material coating step of FIG. In the second joint material coating step, the second joint material 22 is applied to the first flange portion 31 and the first joint material 21, and the first flange portion 31 is placed between the first joint material 21 and the second joint material 22. Place in.

The second bonding material 22 is a part of the bonding material 2. The amount of the second bonding material 22 is 2/3 of the amount of the bonding material 2. In other words, the second joint material 22 is a portion of the joint material 2 excluding the first joint material 21. In the second bonding material coating step, a screen printing machine and a screen printing mask are used as in the first bonding material coating step. As a result, the second joint material 22 is applied only to the respective set regions of the first flange portion 31 and the first joint material 21. By changing the plate thickness of the screen printing plate, the coating amount of the second bonding material 22 is changed.

As shown in FIG. 3, after step S4, a second heat drying step is performed in step S5. In the second heat drying step, the organic solvent contained in the bonding material 2 is removed. In the second heat drying step, the bonding material 2 is heated to 80 ° C. for 30 minutes.

After step S5, the contact joining step is performed in step S6. FIG. 7 is a diagram showing a contact joining step of FIG. In the contact joining step, the contact 4 is superposed on the second joining material 22, and the contact 4, the first joining material 21 and the second joining material 22 are compressed and heated in the stacking direction to join the first joining material 21 and the second joining material 22 and the second joining material 22. The joining material 2 made of the material 22 and the contact 4 are joined.

The work of superimposing the contact 4 on the second bonding material 22 is automatically performed by a mounting device having a positioning camera and a mounting collet. The mounting device identifies each of the position of the contact 4 and the position of the second joint material 22 by using the image taken by the alignment camera, and determines the position where the contact 4 is overlapped with the second joint material 22. To do.

Further, in the work of superimposing the contact 4 on the second bonding material 22, the mounting device heats the mounting collet holding the contact 4 to about 150 ° C. and applies the contact 4 to the second bonding material 22 at a pressure of about 500 Pa. Press on. As a result, the adhesive solvent contained in the second bonding material 22 volatilizes, and the contact 4 and the second bonding material 22 adhere to each other.

The work of compressing and heating the contact 4, the first bonding material 21, and the second bonding material 22 in the stacking direction is performed by a pair of bonding collets 5. In the work of compressing and heating the contact 4, the first bonding material 21, and the second bonding material 22 in the stacking direction, one bonding collet 5 is applied to the contact 4 and the other bonding collet 5 is applied to the leg portion 32. .. Further, in the work of compressing and heating the contact 4, the first bonding material 21, and the second bonding material 22 in the stacking direction, the bonding collet 5 is heated to 250 ° C., and at the same time, the bonding collet 5 is used at a pressure of 10 MPa. , Contact 4 and leg 32 are compressed in the stacking direction for 10 minutes. As a result, the first joining material 21 and the second joining material 22 are integrated, and the contact 4 and the joining material 2 are joined to each other.

As shown in FIG. 3, after step S6, a leg deformation step is performed in step S7. FIG. 8 is a diagram showing a leg deformation step of FIG. In the leg deformation step, the leg portion 32 is deformed to form the second flange portion 33 facing the second surface 13 on the rivet 3. As a result, the rivet 3 is fixed to the base metal 1 by caulking. In this example, the leg portion 32 is compressed in the stacking direction to form the second flange portion 33 facing the second surface 13 on the rivet 3. In the leg deformation step, the contact 4 and the leg 32 are compressed in the stacking direction for 10 minutes at a pressure of 30 MPa using a pair of joining collets 5. As described above, the electric contactor is manufactured.

A second flange 33 is formed on the rivet 3 by the leg deformation step. As a result, as shown in FIG. 2, the compressive force P acting on the portion of the bonding material 2 overlapped with respect to the peripheral edge portion of the contact 4 remains. In other words, the portion of the bonding material 2 overlapped with respect to the peripheral edge portion of the contact 4 is pressed against the first surface 12. Therefore, the bonding strength between the contact 4 and the bonding material 2 is improved, and peeling of the contact 4 from the base metal 1 is suppressed. As a result, the reliable life of the electrical contacts is extended.

Next, the further effect of arranging the first flange portion 31 of the rivet 3 inside the bonding material 2 will be described. When the first flange portion 31 is not arranged inside the joining material 2, the contact point 4 is joined to the base metal 1 via the joining material 2. Therefore, a diffusion bond is formed at the interface between the contact 4 and the bonding material 2. The bonding force between the contact 4 and the bonding material 2 is determined by the mechanical stress applied from the outside and the heating temperature when the contact 4 and the bonding material 2 are bonded. Therefore, as the electrical contactor is used, the bonding force between the contact 4 and the bonding material 2 gradually decreases. Of the bonding forces between the contact 4 and the bonding material 2, the bonding force between the peripheral edge of the contact 4 and the portion of the bonding material 2 overlapped on the peripheral edge of the contact 4 is the weakest. A peeling phenomenon is likely to occur between the peripheral edge portion and the portion of the joining material 2 overlapped with the peripheral edge portion of the contact 4.

On the other hand, when the first flange portion 31 is arranged inside the joining member 2, a force acts on the rivet 3 to release the stress generated in the rivet 3 due to the compressive deformation of the rivet 3. Therefore, a force that presses the joining material 2 toward the contact 4 acts on the first flange portion 31. The force with which the bonding material 2 is pressed toward the contact 4 by the peripheral edge of the first flange portion 31 is larger than the force with which the bonding material 2 is pressed toward the contact 4 by the central portion of the first flange portion 31. Therefore, the peripheral edge portion of the bonding material 2 is pressed toward the contact 4 with a stronger force than the central portion of the bonding material 2.

Even after the contact joining step, the mechanical stress and heating from the outside are applied to the joining material 2 and the contact 4, so that diffusion joining at the interface between the joining material 2 and the contact 4 proceeds, and the joining proceeds. The joint strength between the material 2 and the contact 4 is increased. Therefore, the force acting on the contact 4 from the rivet 3 promotes the diffusion bonding between the bonding material 2 and the contact 4. As a result, as the electrical contactor is used, the bonding strength between the bonding material 2 and the contact 4 increases. From the above, as compared with the case where the first flange portion 31 of the rivet 3 is not arranged inside the joining material 2, the portion of the joining material 2 overlapped with the peripheral portion of the contact 4 and the peripheral portion of the contact 4. The joint strength between and is increased.

As described above, the electric contact according to the first embodiment of the present invention includes a contact 4 joined to the base metal 1 via a joining material 2 and a rivet 3. The rivet 3 faces the first surface 12 and is integrally formed with the first flange portion 31 and the first flange portion 31 provided inside the joining member 2, and the leg portion 32 and the leg are inserted into the through hole 11. It is integrally formed with the portion 32 and has a second flange portion 33 facing the second surface 13 of the base metal 1. The joining material 2 is pressed against the first surface 12 by the rivet 3. As a result, the peripheral edge portion of the bonding material 2 is suppressed from peeling from the base metal 1. As a result, deterioration of the joint between the contact 4 and the base metal 1 can be suppressed.

Further, the portion of the joining material 2 overlapped with respect to the peripheral edge portion of the contact 4 is pressed against the first surface 12 by the rivet 3. By using the electric contact, a force acts on the peripheral edge of the contact 4 in a direction away from the bonding material 2. The portion of the joining material 2 overlapped with respect to the peripheral edge of the contact 4 is pressed against the first surface 12 by the rivet 3, so that the portion of the joining material 2 overlapped with respect to the peripheral edge of the contact 4 becomes a base. Separation from gold 1 is suppressed. As a result, deterioration of the joint between the contact 4 and the base metal 1 can be suppressed.

Further, the peripheral edge portion of the first flange portion 31 presses the joining material 2 toward the contact point 4. Therefore, the joint strength between the peripheral edge portion of the contact 4 and the portion of the bonding material 2 overlapped with the peripheral edge portion of the contact 4 can be increased.

According to the method for manufacturing an electric contact according to the first embodiment of the present invention, the leg portion 32 is deformed to form the second flange portion 33 facing the second surface 13 of the base metal 1 on the rivet 3. A partial deformation step is provided, and in the leg deformation step, the joining material 2 is pressed against the first surface 12 by the rivet 3. As a result, the peripheral edge portion of the bonding material 2 is suppressed from peeling from the base metal 1. As a result, deterioration of the joint between the contact 4 and the base metal 1 can be suppressed.

Embodiment 2.
In the first embodiment, the bonding material 2 contains Ag fine particles. Further, in the first embodiment, the main component of the contact 4 is Ag, and the additive of the contact 4 is an oxide of In and an oxide of Sn. On the other hand, in the second embodiment, the bonding material 2 contains Cu nanoparticles which are Cu fine particles. Cu fine particles are included in metal fine particles. The main component of the contact 4 is Cu, and the additive of the contact 4 is W (tungsten). The contact 4 contains about 1 to 40 wt% of W. Other configurations are the same as those in the first embodiment.

In the first embodiment, in the contact joining step, the joining collet 5 is heated to 250 ° C., and at the same time, the contact 4 and the leg portion 32 are compressed in the stacking direction for 10 minutes at a pressure of 10 MPa using the joining collet 5. .. On the other hand, in the second embodiment, in the contact joining step, the contact collet 5 is heated to 280 ° C., and at the same time, the contact 4 and the leg portion 32 are compressed in the stacking direction for 10 minutes at a pressure of 20 MPa using the joining collet 5. To do. Other methods for manufacturing the electrical contactor are the same as those in the first embodiment.

As described above, according to the electric contact according to the second embodiment of the present invention, the contact 4 joined to the base metal 1 via the bonding material 2 and the rivet 3 are provided. The rivet 3 faces the first surface 12 and is integrally formed with the first flange portion 31 and the first flange portion 31 provided inside the joining member 2, and the leg portion 32 and the leg are inserted into the through hole 11. It is integrally formed with the portion 32 and has a second flange portion 33 facing the second surface 13 of the base metal 1. The joining material 2 is pressed against the first surface 12 by the rivet 3. As a result, the peripheral edge portion of the bonding material 2 is suppressed from peeling from the base metal 1. As a result, deterioration of the joint between the contact 4 and the base metal 1 can be suppressed.

Embodiment 3.
FIG. 9 is a cross-sectional view showing an electrical contactor according to a third embodiment of the present invention. An uneven portion 34 is formed on the surface of the first flange portion 31 of the rivet 3 facing the contact point 4. As a result, the contact area of the rivet 3 with respect to the bonding material 2 at the first flange portion 31 increases. Therefore, the joint strength between the first flange portion 31 of the rivet 3 and the joint material 2 is improved. Other configurations are the same as those in the first embodiment. The other configurations may be the same as those in the second embodiment.

As described above, according to the electric contact according to the second embodiment of the present invention, the uneven portion 34 is formed on the surface of the first flange portion 31 facing the contact point 4. As a result, the joint strength between the first flange portion 31 of the rivet 3 and the joint material 2 can be improved.

Embodiment 4.
FIG. 10 is a cross-sectional view showing an electrical contactor according to a fourth embodiment of the present invention. An uneven portion 35 is formed on the surface of the first flange portion 31 of the rivet 3 facing the base metal 1. As a result, the contact area of the rivet 3 with respect to the bonding material 2 at the first flange portion 31 increases. Therefore, the joint strength between the first flange portion 31 of the rivet 3 and the joint material 2 is improved.

An uneven portion 41 is formed on the surface of the contact point 4 facing the base metal 1. As a result, the contact area of the contact 4 with respect to the bonding material 2 increases. Therefore, the bonding strength between the contact 4 and the bonding material 2 is improved. Other configurations are the same as those in the third embodiment.

As described above, according to the electric contact according to the fourth embodiment of the present invention, the uneven portion 35 is formed on the surface of the first flange portion 31 of the rivet 3 facing the base metal 1. As a result, the joint strength between the first flange portion 31 of the rivet 3 and the joint material 2 can be improved.

Further, an uneven portion 41 is formed on the surface of the contact point 4 facing the base metal 1. Thereby, the bonding strength between the contact 4 and the bonding material 2 can be improved.

Embodiment 5.
FIG. 11 is a cross-sectional view showing an electrical contactor according to a fifth embodiment of the present invention. A recess 42 is formed on the surface of the peripheral edge of the contact 4 facing the base metal 1. As a result, the contact area with respect to the bonding material 2 at the peripheral edge of the contact 4 increases. Therefore, the bonding strength between the peripheral edge of the contact 4 and the bonding material 2 is improved. Other configurations are the same as those in the fourth embodiment.

As described above, according to the electric contact according to the fifth embodiment of the present invention, the recess 42 is formed on the surface of the peripheral edge of the contact 4 facing the base metal 1. Thereby, the bonding strength between the peripheral edge portion of the contact 4 and the bonding material 2 can be improved.

In the fifth embodiment, the uneven portion 34 is formed on the surface of the first flange portion 31 facing the contact point 4, and the uneven portion 35 is formed on the surface of the first flange portion 31 facing the base metal 1. There is. However, the present invention is not limited to this, and as shown in FIG. 12, a recess 36 may be formed on the surface of the peripheral edge of the first flange portion 31 facing the contact point 4. Thereby, the bonding strength between the peripheral edge portion of the first flange portion 31 and the bonding material 2 can be improved. Further, as shown in FIG. 13, a recess 37 may be formed on the surface of the peripheral edge of the first flange portion 31 facing the base metal 1. Thereby, the bonding strength between the peripheral edge portion of the first flange portion 31 and the bonding material 2 can be improved.

1 base metal, 2 joint material, 3 rivets, 4 contacts, 5 collet for joint, 11 through hole, 12 1st surface, 13 2nd surface, 21 1st joint material, 22 2nd joint material, 31 1st collar , 32 Legs, 33 Second collar, 34 Concavo-convex, 35 Concavo-convex, 36 Concave, 37 Concave, 41 Concavo-convex, 42 Concave.

The electric contact according to the present invention has a base metal formed in a plate shape and having through holes formed in the plate thickness direction, a joint material provided on the first surface of the base metal, and a base metal via the joint material. It is integrally formed with the first flange portion and the first flange portion provided inside the joint material, facing the first surface, and integrated with the leg portion and the leg portion inserted into the through hole. It is provided with a rivet having a second flange portion facing the second surface of the base metal, and the first collar portion does not exist in the portion of the joint material between the peripheral edge portion of the contact point and the base metal portion. , The bonding material is pressed against the first surface by rivets.
The method for manufacturing an electric contact according to the present invention is a method of forming a base metal after a first joining material coating step of applying a first joining material to a first surface of a plate-shaped base metal and a first joining material coating step. After the rivet leg insertion step of inserting the rivet leg into the through hole and superimposing the first flange of the rivet on the first joining material and the rivet leg inserting step, the first flange and the first joining After the second joint material application step of applying the second joint material to the material and arranging the first flange portion between the first joint material and the second joint material, and the second joint material application step, the second The contacts are overlapped on the joint material, and the contacts, the first joint material and the second joint material are compressed and heated in the laminating direction, and the contacts, rivets and It is provided with a contact joining step of joining the base metal to each other, and a leg deformation step of deforming the leg portion after the contact joining step to form a second flange portion facing the second surface of the base metal into a rivet. In the leg deformation step, the joining material is pressed against the first surface by rivets.

Claims (7)

A base metal formed in a plate shape and having through holes in the plate thickness direction,
With the joining material provided on the first surface of the base metal,
With the contacts joined to the base metal via the joining material,
It is integrally formed with the first flange portion and the first flange portion provided inside the joint material so as to face the first surface, and is integrally formed with the leg portion inserted into the through hole and the leg portion. A rivet having a second flange facing the second surface of the base metal is provided.
The joining material is an electric contact that is pressed against the first surface by the rivet. The electrical contact according to claim 1, wherein the portion of the bonding material overlapped with respect to the peripheral edge portion of the contact is pressed against the first surface by the rivet. The electricity according to claim 1 or 2, wherein an uneven portion is formed on at least one of the surface of the first collar portion facing the contact point and the surface of the first collar portion facing the base metal. Contact. Claims 1 to claim 1 to claim 1, wherein a recess is formed in at least one of a surface of the peripheral edge of the first flange portion facing the contact point and a surface of the peripheral edge portion of the first flange portion facing the base metal. The electric contact according to any one of up to 3. The first bonding material application step of applying the first bonding material to the first surface of the plate-shaped base metal, and
After the first joining material application step, the rivet leg portion is inserted into the through hole formed in the base metal, and the first flange portion of the rivet is overlapped with the first joining material. ,
After the rivet leg insertion step, the second joint material is applied to the first flange portion and the first joint material, and the first flange portion is between the first joint material and the second joint material. The second bonding material application process to be placed in
After the second bonding material coating step, the contacts are overlapped with the second bonding material, and the contacts, the first bonding material and the second bonding material are compressed and heated in the stacking direction, and the first bonding material is heated. A contact joining step of joining the contact, the rivet, and the base metal to each other via the joining material made of the second joining material.
After the contact joining step, the leg portion is deformed to form a second flange portion facing the second surface of the base metal on the rivet.
A method for manufacturing an electrical contactor in which the joint material is pressed against the first surface by the rivet in the leg deformation step. The method for producing an electric contact according to claim 5, wherein the first bonding material and the second bonding material contain metal fine particles. The method for producing an electric contact according to claim 6, wherein the metal fine particles are Ag fine particles or Cu fine particles.

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