Coating processes – Electrical product produced – Resistor for current control
Patent
1989-07-13
1992-02-18
Bell, Janyce
Coating processes
Electrical product produced
Resistor for current control
427103, 427255, 427259, 427261, 427282, 427287, B05D 512
Patent
active
050892932
ABSTRACT:
A platinum resistance thermometer is formed in a process which includes the defining of a path for the resistance thermometer in an inert material deposited in a layer on the substrate. The substrate surface is exposed in the path, and the inert material forms a negative pattern for the path. The resistive material for the thermometer is then deposited on both the substrate surface exposed in the path and on the surfaces of the inert material remaining on the substrate. After this, the inert material is etched away, and the resistive material deposited on top of the inert material is then loose and can be removed leaving a strip of resistive material in the desired path for forming the resistive thermometer. The strip has low contamination and impurities to more easily reach the desired temperature coefficient of resistance of the strip forming the thermometer.
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Bohara Robert C.
Ruf James A.
Bell Janyce
Rosemount Inc.
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