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US 11,090,978 B2Granted
Tungsten wire and elastic component
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTetsuji Shibata, Tomoya Iwahashi, Tomohiro Kanazawa
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Abstract
A tungsten wire according one aspect of the present disclosure includes: a metal wire containing one of tungsten and a tungsten alloy; and a plating layer which covers a surface of the metal wire. The plating layer contains copper.
Claims10
A tungsten wire, comprising:
- a metal wire containing one of tungsten and a tungsten alloy;
- a plating layer which covers a surface of the metal wire;
- and
- a strike plating layer which is disposed between the metal wire and the plating layer, the strike plating layer being in contact with and covering the surface of the metal wire, wherein
- a tungsten content of the metal wire is at least 90 wt %,
- the plating layer contains copper,
- the strike plating layer contains nickel, and
- surface roughness Ra of the surface of the metal wire is at least 3 μm and at most 4 μm.
5 more elements
Dependencies are inferred from the claim text.