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Browse Prior Art Database

RELIABLE SCREEN PRINTED RESISTORS WITH PHOTODEFINED DIMENSIONS

IP.com Disclosure Number: IPCOM000009744D
Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2002-Sep-16

Publishing Venue

Motorola

Related People

Authors:
Gregory Dunn Min-xian Zhang Steven Scheifers

Abstract

Polymer thick film (PTF) resistors terminated directly to etched copper terminals on a printed circuit board exhibit substantial resistance increase under temperature/humidity stress. The problem becomes acute for low aspect ratio resistors, because the resistance of the copper/carbon paste interface can be of the same order as the bulk resistance.