Acquisition method of laser resistance trimming scheme, laser resistance trimming scheme and chip resistor

Abstract

The invention relates to the technical field of laser resistance trimming, in particular to an acquisition method of a laser resistance trimming scheme, the laser resistance trimming scheme and a chipresistor. The acquisition method of the laser resistance trimming scheme comprises the following steps that a to-be-trimmed resistor is subjected to primary cutting through a serpentine knife edge, so that the resistance value precision of the to-be-trimmed resistor reaches the preset precision, and the value range of the preset precision is 0.1%-1%; the to-be-trimmed resistor is subjected to secondary cutting through the cutter edge; it is judged whether the resistance precision of the to-be-trimmed resistor reaches the target precision or not; and if the resistance precision of the to-be-trimmed resistor reaches the target precision, it is determined that the laser resistance trimming scheme is that the blank resistor is cut by the serpentine knife edge and the bisection knife edge in sequence. The laser resistance trimming scheme is obtained by adopting the obtaining method of the laser resistance trimming scheme. The chip resistor is produced through the laser resistance adjustingscheme. According to the acquisition method of the laser resistance trimming scheme, the laser resistance trimming scheme and the chip resistor, the precision and the yield of the finished resistor can be improved.

Description

technical field [0001] The invention relates to the technical field of laser resistance trimming, in particular to a method for obtaining a laser resistance adjustment scheme, a laser resistance adjustment scheme and a chip resistor. Background technique [0002] The principle of laser trimming is to use a very thin laser beam to hit the thick and thin film resistors, and the resistor body is vaporized and evaporated to realize the cutting of thick and thin film circuits. By changing the conductive cross-sectional area of ​​the resistors, the resistance accuracy is improved. [0003] In order to improve the resistance accuracy from 1% to 0.1%, laser repairing is usually performed by secondary resistance adjustment. After the first resistance adjustment operation, it is usually cut within the accuracy range of 1% to 1.5% of the target value, and then after the second resistance adjustment operation, it is cut within the accuracy range of 0.1% of the target value. [0004] Ho...

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide a method for obtaining a laser resistance adjustment scheme, so as to obtain a method that can solve the low resistance accuracy and low yield of the secondary resistance adjustment method commonly found in the current secondary resistance adjustment method to a certain extent. Laser Trimming Solution for Technical Problems

Images