CLAIMS
1. A contact comprising:
a base metal;
a contact point fixed to the base metal; and a conductive member provided between the base metal and the contact point, the conductive member having a lower hardness than the contact point and being capable of plastic flow, wherein
an outer peripheral surface of the base metal includes a recess to allow engagement of a jig provided to a moving part of an ultrasonic welder, the recess being set back perpendicularly to a direction that the base metal, the conductive member, and the contact point are arranged.
2. The contact according to claim 1, wherein the outer peripheral surface includes a plurality of the recesses.
3. The contact according to claim 1 or 2, wherein a step defining the recess has the shape of a polygon with four or more angles.
4. The contact according to any one of claims 1 to 3, wherein
a material of the contact point is a sintered metal, a material of the base metal is one of electrolytic copper and oxygen-free copper, and
the conductive member is silver.
5. The contact according to any one of claims 1 to 4,
wherein the recess is positioned to overlap an area that

is formed by projection of the contact point toward the base metal.
6. A contact manufacturing method comprising:
a step of manufacturing a base metal that includes, in an outer peripheral surface, a recess that allows engagement of a jig provided to a moving part of an ultrasonic welder;
a step of manufacturing a contact point to be fixed to the base metal;
a step of forming, on the contact point, a conductive member that has a lower hardness than the contact point and is capable of plastic flow;
a step of placing the base metal on a fixing base of the ultrasonic welder;
a step of inserting the jig into the recess of the base metal placed on the fixing base;
a step of placing the contact point on the base metal; and
a step of applying an ultrasonic vibration to the contact point from a press tool of the ultrasonic welder.
7 . The contact manufacturing method according to claim 6, wherein
one of electrolytic copper and oxygen-free copper is used as a material of the base metal in the step of manufacturing the base metal,
a sintered metal is used as a material of the contact point in the step of manufacturing the contact point, and
silver is used as a material of the conductive

member in the step of forming the conductive member on the contact point.
8 . The contact manufacturing method according to claim 6 or 7, wherein the recess is positioned to overlap an area formed by projection of the contact point toward the base metal in the step of manufacturing the base metal.