Coating processes – Electrical product produced – Condenser or capacitor
Patent
1984-05-23
1986-07-22
Bueker, Richard
Coating processes
Electrical product produced
Condenser or capacitor
427101, 427102, 4271263, 4271264, 4271266, 427314, 4273722, 427421, B05D 512
Patent
active
046019146
ABSTRACT:
A method for fabricating a solid state semiconductor gas sensor and the semiconductor sensor itself for use in equipment detecting small amounts of H.sub.2 S. The method of sensor fabrication comprises spray deposition of a mixture of metal oxides mixed together with various metal and non-metal materials which serve in the finished product as activators, dopants, and/or film binder materials, and including in suspension a molecular sieve material, for enhancing porosity on a scale of molecular dimensions in the finished sensor. All of the foregoing materials are suspended in a suitable solution and preferably sprayed onto a heated insulating substrate to form the finished product. The example sensor, capable of selective detection of H.sub.2 S in air and a sensitivity of less than 1 PPM (part per million), is comprised of a platinum activated alumina, tin oxide, and zeolite molecular sieve material.
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Barnes James O.
Leary David J.
Airtech, Inc.
Berkstresser Jerry W.
Bueker Richard
Klaas Bruce G.
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