Patent ID: 11901655
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC H

Claim 0:
1. A pin terminal, comprising:
a bar-like base material; and
a plating layer covering a predetermined region of the base material,
wherein:
the base material is made of pure copper or a copper alloy,
the plating layer includes a tin-based layer made of metal containing tin,
one end side of the base material includes a tip covering portion covering an entire region in a circumferential direction of the base material,
the tin-based layer includes the tip covering portion,
the tip covering portion includes a thin film portion and a thick film portion at positions different in the circumferential direction of the base material,
the thin film portion is provided in contact with the base material,
a maximum wetting force of the tip covering portion measured by a meniscograph tester is 0.25 mN or more,
the tip covering portion includes an outer layer and an inner layer,
the inner layer is made of an alloy containing tin and copper, and
a thickness of the inner layer in the thin film portion is 0.1 μm or more.