Electric contact materials, production methods thereof and elect

Details Electric contact materials, production methods thereof and elect Electric contact materials, production methods thereof and elect

1993-03-29

1995-04-25

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

200268, 200266, 428336, 428472, 428698, 428704, H01H 102, H01R 1302

Patent

active

054097622

ABSTRACT:
The present invention provides inexpensive electric contact materials having higher hardness and higher melting point and being more excellent in the points of wear resistance and environmental resistance over the electric contact materials of Ag type, Au type, platinum group type, etc. having been used so far, production methods thereof and electric contacts used said contact materials.
In the electric contact materials of the invention, basically, a covering layer having at least one selected from transition metals of groups IVa (Ti, Zr, Hf, etc.), Va (V, Nb, Ta, etc.) and VIa (Cr, Mo, W, etc.) as a major ingredient is formed on the substrate as an electric contact in a thickness of 0.03 to 100 .mu.m, and, if need be, a fixed intermediate layer is formed between said covering layer of electric contact and substrate or a fixed surface layer is formed on the outside of covering layer of electric contact, thus aiming at further improvement in the characteristics of contact.
Such covering layer of electric contact can be formed by chemical vaporization or physical vaporization such as plasma CVD, sputtering, ion assist vaporization, ion plating, laser beam sputtering or the like and, by making the conditions of these vaporizations appropriate, it is possible to produce the electric contact materials having excellent characteristics of contact.

REFERENCES:
patent: 4405849 (1983-09-01), Frame
patent: 4680438 (1987-07-01), Witting et al.
patent: 4774151 (1988-09-01), Cuomo et al.
patent: 4904542 (1990-02-01), Mroczkowski
patent: 4933520 (1990-06-01), Ohba et al.

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