Method of adjusting the values of resistors

Details Method of adjusting the values of resistors Method of adjusting the values of resistors

1984-09-18

1987-05-12

Grimley, A. T.

Electrical resistors

Mechanically variable

Resistance value varied by removing or adding material

29592R, 29610R, 29620, 338267, 338278, 338308, H01C 1000

Patent

active

046653775

ABSTRACT:
A method of adjusting the values of resistors is described wherein regions of a resistive layer provided on a substrate are removed by means of a laser in dependence on the resistance that is required and/or by cutting marks of a specific shape into the resistive layer. In order to obtain resistors with values which are defined as accurately as possible, and which are free of disturbing inductivity, a point raster is formed in the resistive layer by means of single shots of the laser, with the extent and position of the raster, and/or the spacing between its individual points, and/or the size of the individual points being chosen in relation to the total area of the resistive layer in dependence on the required resistance and further physical values.

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

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