Method of trimming precision resistors

Details Method of trimming precision resistors Method of trimming precision resistors

1984-11-05

1986-01-28

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156643, 156655, 156656, 156667, 219121LJ, 219121LM, 338195, 427 531, 427102, B23K 900, H01C 1000, B44C 122, C23F 102

Patent

active

045669368

ABSTRACT:
A method for trimming precision resistors which includes forming a helical groove in a conductive film coating on a cylindrical core. Final trimming includes forming discrete circular depressions in the film coating by using a pulsed laser. This method enables the manufacture of precision resistors having a tolerance of 0.25% or better.

REFERENCES:
patent: 3916144 (1975-10-01), Schuermann

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