Sumitomo Electric Industries, Limited

Sumitomo Wiring Systems, Limited

Autonetworks Technologies, Limited

Masayuki Ookubo

Hajime Watanabe

Yoshifumi Saka

Yasushi Saitoh

Akihiro Kato

Kingo Furukawa

Yoshimasa Shirai

Mikio Satou

Yoshiyasu Tsuchiya

Tetsuhiko Kawasaki

It is aimed to provide a press-fit terminal connection structure in which a board connecting portion of a press-fit terminal is press-fit into a through hole provided in a printed circuit board and which can combine the suppression of scraping of a surface layer and a reduction of a necessary load when the press-fit terminal is inserted into and withdrawn from the through hole and an improvement of a holding force for keeping the press-fit terminal inserted in the through hole. In the press-fit terminal connection structure, the press-fit terminal includes, at least on a surface of the contact point portion, an alloy containing layer mainly containing tin and palladium, and the through hole includes a tin layer on an outermost surface of an inner peripheral surface including at least the contact point portion.

Press-fit terminal connection structure having types of alloy layer

A terminal pair including a first terminal provided with a first contact portion and a second terminal provided with a second contact portion. The first contact portion includes a composite covering layer having a Sn&#x2014;Pd based alloy phase and a Sn phase, and has a surface including the Sn&#x2014;Pd based alloy phase and the Sn phase. The second contact portion includes a Cu&#x2014;Sn alloy layer and a Sn layer covering part of the Cu&#x2014;Sn alloy layer, and has a surface including a Cu&#x2014;Sn alloy region corresponding to an exposed portion of the Cu&#x2014;Sn alloy layer and a Sn region corresponding to an exposed portion of the Sn layer. A coefficient of friction for sliding movement between the first contact portion and the second contact portion is lower than a coefficient of friction for sliding movement between the two first contact portions and between the two second contact portions.

Terminal pair and connector pair including terminal pair

The present invention aims to provide a plated terminal for connector which requires a smaller insertion force by reducing a friction coefficient and a terminal pair formed using such a plated terminal for connector. An alloy containing layer () made of tin and palladium and containing a tin-palladium alloy is formed on a surface of a terminal base material () made of copper or copper alloy. Here, the alloy containing layer () is preferably such that domain structures of a first metal phase () made of an alloy of tin and palladium are formed in a second metal phase () made of pure tin or an alloy having a higher ratio of tin to palladium than in the first metal phase ().

Plated terminal for connector and terminal pair

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Yokkaichi, Japan

Masayuki Ookubo