PRECISION RESISTOR AND METHOD FOR LASER TRIMMING THE RESISTANCE VALUES THEREOF

摘要

The present invention relates to the field of electrical engineering, and more particularly to technology for the manufacture of resistive components, particularly thin film technology. The present invention addresses the problem of creating a simple, reliable and easily manufacturable resistor and a method for laser trimming the resistance values thereof. Reducing the time required to laser trim a single resistor reduces the time required to trim an entire array of resistors formed on a substrate, which, in turn, reduces costs and optimizes production. In a precision resistor containing an insulating substrate having, on the working surface thereof, a thin film resistive layer with a meander pattern with regions of differing resistance, said layer containing jumpers which short-circuit elements of the meander and are intended to be removed during trimming of the resistance values of the resistor, the problem of interest is solved in that the jumpers are substantially n-shaped and project beyond the bounds of the meander pattern, and the resistor is provided with a precision laser trimming portion in the form of a continuous portion of the thin film resistive layer, which is situated on the working surface of the substrate such as to be level with the projecting substantially n-shaped jumpers.