基本信息
摘要：1,213,157. Semi-conductor devices. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 28 Jan., 1969 [31 Jan., 1968], No. 4581/69. Heading H1K. A transducer measures mechanical or physical parameters by their effect on the electrical resistance of a whisker of silicon carbide which forms the transducer element. This whisker is grown by recrystallization and/or condensation in a space bounded by silicon carbide in a protective gas atmosphere in the presence of lanthanum, or by the vapour-liquid-solid mechanism with iron in the liquid phase. The whisker is doped with aluminium or boron, and is provided with ohmic contacts of tungsten, or a gold alloy containing tantalum or tantalum and aluminium. Various embodiments of the transducer are described for measuring gas pressure, tensile stress, gas flow rate, temperature, electromagnetic radiation or liquid level in a container.
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