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Trimming Cermet Resistors

IP.com Disclosure Number: IPCOM000087063D
Original Publication Date: 1976-Dec-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Ameen, JG: AUTHOR [+2]

Abstract

It is possible to fabricate thin-film resistors on metallized ceramic. These thin-film resistors can be made compatible with conventional chrome-copper-chrome circuitry.

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Trimming Cermet Resistors

It is possible to fabricate thin-film resistors on metallized ceramic. These thin-film resistors can be made compatible with conventional chrome-copper- chrome circuitry.

The resistors are made of a cermet material, such as a mixture of chrome and silicon monoxide. The value of the resistor can be controlled by chemically etching the resistor with a chromium etchant, such as KMnO(4)(alkaline). The value of the resistor can be changed by varying the length of the etching time. This technique eliminates the need for abrasive or laser trimming methods.

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