Light source device, method for manufacturing the same and filament

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United States of America Patent

PATENT NO 9252007
APP PUB NO 20140084785A1
SERIAL NO

14033334

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Abstract

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A filament using a high melting point metal compound such as tantalum carbide is provided. As the filament, a filament comprising a tungsten base material, a tantalum layer coating the tungsten base material, and a tantalum carbide layer coating the tantalum layer is used. The tantalum layer and the tantalum carbide layer may be replaced with a hafnium layer and a hafnium carbide layer, respectively, or may be formed of a combination of tantalum and hafnium.

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Patent Owner(s)

Patent OwnerAddress
STANLEY ELECTRIC CO LTDMEGURO-KU TOKYO 153-8636

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsumoto, Takahiro Yokohama, JP 196 1869
Suzuki, Shigemi Tsukuba, JP 11 101

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