Adjustment method for fine adjustment of resistance value of thin film resistor, and thin film resistor

Abstract

The invention discloses an adjustment method for fine adjustment of a resistance value of a thin film resistor, and the thin film resistor. The adjustment method is characterized by comprising the steps: a plurality of resistance adjustment holes or spots are arranged in the thin film resistor according to the resistance value, needing to be adjusted, of the resistor, and the thin film resistor provided with the resistance adjustment holes or spots is the resistor with the adjusted resistance value. Through the mode that the multiple holes or spots are arranged in the resistor, the problem that the adjusted resistance value is greatly different from the actual demand due to L-shaped laser cutting adjustment is avoided.

Description

technical field [0001] The invention belongs to the technical field of thin-film resistor production, and in particular relates to an adjustment method for fine-tuning the resistance value of the thin-film resistor and the thin-film resistor. Background technique [0002] Thin film resistors are high-end products in printed circuit boards. Through a series of complex processes such as optical imaging and potion etching, while making circuits, a certain size of resistive film area is produced, and it has the same function as resistive components, saving Go to the SMT where the device is mounted, and it does not take up printed circuit board space. Such as figure 1 As shown, the schematic diagram of the thin film resistor 1 after molding, the calculation formula of the resistance value of the thin film resistor 1 is [0003] R=R 方 *L / W [0004] Among them, R is the resistance value of the resistor, R square is the square resistance of the thin film resistor, L is the lengt...

AI Technical Summary

Problems solved by technology

[0009] 1. Among the key parameters of adjusting the resistance, L1 and W1 are limited by the etching precision of the resistance size and the precision of the laser equipment. In practical applications, due to the problem of graphic deviation and laser alignment deviation, there is a deviation between L1 and W1 and the design value. Finally, the adjusted resistance value does not match the expected problem;

[0010] 2. The above-mentioned laser adjustment resistance process has a slow response speed, and it is necessary to make temporary documents according to the actual resistance value after molding, which cannot be pre-designed, resulting in production stagnation;

[0014] 2. L-shaped laser cutting is used for adjustment, and the response speed is slow. It is necessary to measure the actual resistance value after forming, and then make a file, and it is impossible to make a laser file in advance;

[0015] 3. L-shaped laser cutting is used for adjustment, which is not suitable for mass production. Each resistor size and resistance value needs to use a separate file, which has a large workload and low efficiency

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