High-precision and low-resistance alloy chip resistor efficiently resistance-regulating technique

Abstract

The invention aims at providing a high-precision and low-resistance alloy chip resistor efficiently resistance-regulating technique. The high-precision and low-resistance alloy chip resistor efficiently resistance-regulating technique comprises 2) punching a raw material belt through a punch press or die into alloy chip resistors; 2) testing the resistance of every alloy chip resistor, and classifying the alloy chip resistor; 3) for the alloy chip resistors in different resistance ranges, adjusting the position of every product during every feeding, punching out notches in the alloy chip resistors; 4) after the products are conveyed to a punching position, limiting the short side of every product through a feeding groove of a lower die; 5) measuring the resistance of the resistance-regulated resistor and re-classifying the resistors; 6) on different levels punching the alloy chip resistors with the resistance offset ranging between 1% and 5% until reaching within a target resistance range so as to improve the resistance qualification rate of the resistors. The high-precision and low-resistance alloy chip resistor efficiently resistance-regulating technique is low in requirements onequipment, only requires the die, the punching press and a feeding device, and is free from chemical pollution, applicable to continuous operation and high in operation efficiency.

Description

technical field [0001] The invention belongs to the technical field of electronic components, and in particular relates to a high-efficiency resistance adjustment process of a high-precision low-resistance alloy chip resistor. Background technique [0002] The currently used or disclosed resistance adjustment technology mainly uses chemical corrosion liquid to corrode the resistor body or laser resistance adjustment. The use of chemical corrosion liquid to adjust resistance is likely to cause environmental damage due to the use of nitrates and hydrocarbons in chemical corrosion liquids. Pollution, harm to the physical and mental safety of workers, etc., while using laser trimming, there are slight differences in the resistivity of the resistive material and the size of the resistors, and the resistance value of each resistor is inconsistent, resulting in the yield of the resistor product after laser trimming. It is not high. Although the yield rate of single-particle resista...

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Problems solved by technology

[0002] The currently used or disclosed resistance adjustment technology mainly uses chemical corrosion liquid to corrode the resistor body or laser resistance adjustment. The use of chemical corrosion liquid to adjust resistance is likely to cause environmental damage due to the use of nitrates and hydrocarbons in chemical corrosion liquids. Pollution, harm to the physical and mental safety of workers, etc., while using laser trimming, there are slight differences in the resistivity of the resistive material and the size of the resistors, and the resistance value of each resistor is inconsistent, resulting in the yield of the resistor product after laser trimming. It is not high. Although the yield rate of single-particle resistance is high while the resistance is measured by laser, the efficiency of resistance adjustment is not high, and the thermal effect generated during laser resistance adjustment also has a certain degree of influence on the lattice arrangement and performance of alloy materials. Therefore, the traditional The resistance adjustment method becomes a key step restricting production efficiency

[0003] The difference in the size and resistivity of the alloy chip resistor after granulation causes the resistance value to be distributed in an interval, because the alloy chip resistor has high requirements on the resistance value accuracy, resulting in high precision (such as ±1% or ±0.5%) The yield rate of the alloy chip resistor is low, so it is necessary to adjust the resistance of the resistor with a small resistance value to ensure that the resistance value is within the accuracy range

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