Precision thick film elements

Details Precision thick film elements Precision thick film elements

1991-06-04

1992-09-15

Lateef, Marvin M.

Electrical resistors

Mechanically variable

Resistance value varied by removing or adding material

338185, H01C 1010

Patent

active

051481430

ABSTRACT:
A precision thick film resistor has a deposited thick film conducting layer which is adjacent to and in contact with a deposited thick film resistive layer. A laser scribed line, having a width on the order of 2 mils, separates the conductive region into two parts and then extends into the resistive layer. The value of the resistor is set based on the extent that the line extends into the resistive layer. A plurality of thick film conducting elements can be formed by depositing a continuously extending thick film conducting layer on a substrate. Laser scribed lines can be used to isolate various conducting elements in the deposited film from one another. Elements are separated from one another by 2 mil wide laser scribed lines.

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patent: 4649366 (1987-03-01), McDonald
patent: 4841275 (1989-06-01), Murata
patent: 5051719 (1991-09-01), Gaston et al.

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