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US 12,359,288 B2Granted
Metal wire
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsAkitoshi Kasahara, Naoki Kohyama, Tomohiro Kanazawa, Kenshi Tsuji, Yoshiyuki Kita, Atsushi Shimada, Yuuki Sasagawa
Life of this patent
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Abstract
A metal wire, which is one of a tungsten wire and a tungsten alloy wire, includes alkali metal on the surface thereof. The amount of alkali metal is at most 2.0 μg per 1 g of the metal wire.
Claims12
A metal wire that is one of a tungsten wire and a tungsten alloy wire,
- wherein a diameter of the metal wire is at least 5 μm, and
- wherein an amount of alkali metal present on a surface of the metal wire is at least 0.1 μg per 1 g of the metal wire and at most 2.0 μg per 1 g of the metal wire.
Dependencies are inferred from the claim text.