Technique for trimming photoresistors and trimmed photoresistors

Details Technique for trimming photoresistors and trimmed photoresistors Technique for trimming photoresistors and trimmed photoresistors

1993-04-02

1994-05-03

Lateef, Marvin M.

Electrical resistors

Resistance value responsive to a condition

Photoconductive

H01L 3108

Patent

active

053091329

ABSTRACT:
A technique for trimming photoresistors to change relatively high tolerance parts to relatively low tolerance parts by blocking out a portion of the photoactive area, and the so-trimmed photoresistors. The blocking out can be performed by placing ink over the photo-active area. This ink placement step can be easily added in the photoresistor assembly line after the initial calibration location.

REFERENCES:
patent: 4307372 (1981-12-01), Matsui et al.
patent: 5192631 (1993-03-01), Inoue et al.

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