Alloy resistor and preparation method thereof

Abstract

The invention discloses an alloy resistor and a preparation method thereof. A plurality of grooves are formed in one surface of a resistor body to serve as trimming areas of the resistor body. The fine adjustment of the resistance value of a product is realized through the adjustment of the grooves. In this way, a high-precision resistance value is obtained. Meanwhile, the inner surfaces of the grooves form a heat dissipation surface of the resistor body in a trimming area, so that the heat dissipation area is maximized. In addition, when the resistor body is installed on a PCB, a large gap isformed between the trimming area and the PCB due to supporting of electrodes at the two ends thereof. As a result, the heat dissipation efficiency of the product is improved, and the temperature of the surface of the product is reduced. Therefore, the power of the resistor is improved. According to the preparation method, the alloy material and the electrode material of the resistor body are compositely rolled into a composite strip, wherein the electrode material is removed and the grooves are etched to form the trimming area. The integrity of the structure is guaranteed, and the integrity of the heat dissipation structure is kept. An alloy resistor with high resistance precision can be formed by adjusting the grooves.

Description

technical field [0001] The invention belongs to the field of electronic components, and in particular relates to a high-power alloy resistor and a preparation method thereof. Background technique [0002] Resistor is an indispensable electronic component in the circuit, and it is also a power device. When the circuit is working, the resistance will heat up and the temperature will rise. If the heat dissipation is not timely, the temperature will rise sharply, affecting the resistance accuracy of the resistance, which will cause certain interference to the detection of the IC. [0003] The resistor is generally composed of a resistor body in the middle and electrodes on both sides. The resistor generates heat in the middle, conducts the heat to the electrodes, and then conducts the heat to the PCB through the electrodes. The factors affecting heat conduction in this process are the temperature difference on both sides, the heat transfer area and the material heat transfer co...

AI Technical Summary

Problems solved by technology

Generally, the high-precision requirements of the resistance are realized by adjusting the resistance, such as Image 6 As shown, the traditional method of adjusting resistance is to open a gap in the middle of the product. Although this method can obtain a high-precision resistance value, it will lead to a large resistance in the middle and aggravated heat generation, which often results in half the effort of adjusting resistance.

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