Title: Method for forming a platinum resistance thermometer
Application Number: 85106536 Application Date: 1985.08.30
Publication Number: 1009570 Publication Date: 1987.03.18
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01K7/18,H01C7/00
Applicant(s) Name: Rosemount Inc. Address:
Inventor(s) Name: James A. Ruf
Attorney & Agent: FU KANG
Abstract:
     This technology consists of determining the path on the inertial medium which was deposited on the substrate for the resistance thermometer exposing the surface of the substrate under the path, so that a negative picture can be formed on the inertial medium, and then depositing simultaneously resistance materials onto the exposed surface of the substrate and onto the surface of the residual inert material on the substrate. After the inertial medium being etched, the resistance materials deposited on the inert material become less solid and can be cleaned away. As a result, the resistance strips are remainded on the path needed for forming the resistance thermometer. The resistance strips are less polluted and the impurity concentration is lower, so that the thermometer with needed temp. coefficient of resistance can be easily obtained.
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