High-precision resistor capable of reducing resistance value change rate

Abstract

The invention discloses a high-precision resistor capable of reducing a resistance value change rate. The high-precision resistor comprises a ceramic substrate, a surface electrode, a back electrode,a resistor, a primary protection layer, a secondary protection layer, a marker, a terminal electrode, a middle electrode and an outer electrode, wherein the resistor is arranged in the middle of the surface of the ceramic substrate, the primary protection layer and the secondary protection layer are sequentially overlapped on the upper side of the resistor from bottom to top, the resistor is covered by the primary protection layer, and the primary protection layer is covered by the secondary protection layer; the resistor comprises a resistor body and a metal sheet; the resistor body comprisesa plurality of sub bodies, each sub body is in a cuboid shape, the sub bodies are flatly and sequentially arranged on the surface of the ceramic substrate, the length direction of the sub bodies is perpendicularly to the length direction of the ceramic substrate, metal sheets are arranged between two adjacent sub bodies, and the metal sheets are tightly attached to the adjacent sub bodies. According to the high-precision resistor disclosed by the invention, the metal sheets are arranged between the adjacent sub bodies; electrons on the metal sheets are active, so that electron current can besupplemented, and circulating electrons are more; thus, a resistance value is reduced, and a resistance change degree of the resistor is reduced.

Description

technical field [0001] The invention relates to electronic components, in particular to a high-precision resistor with reduced resistance value change rate. Background technique [0002] Resistors are generally directly referred to as resistances in daily life. It is a current-limiting element. After the resistor is connected to the circuit, the resistance value of the resistor is fixed. Generally, there are two pins, which can limit the current through the branch it is connected to. A resistor whose resistance value cannot be changed is called a fixed resistor. Those with variable resistance are called potentiometers or variable resistors. An ideal resistor is linear, that is, the instantaneous current through the resistor is proportional to the instantaneous applied voltage. Variable resistors for voltage division. On the exposed resistor body, one or two movable metal contacts are pressed tightly. The position of the contacts determines the resistance between either ...

AI Technical Summary

Problems solved by technology

[0005] The resistance value of the resistor is determined by the resistivity of the material, the length of the resistive element, and the cross-sectional area of ​​the resistive element. The resistivity of the material is determined after the resistive material is selected. When the current passes through the resistive element, heat is generated, and the thermal reaction will make each of the devices Material expansion or contraction mechanical changes, which affect the length of the resistance element and the change of the cross-sectional area of ​​the resistance element, will cause the instability of the resistance value. In some specific fields, the degree of resistance value change is very high, such as In the field of aviation, blasting, and precise electronic measurement, in these fields, there are high requirements for the accuracy of data control of the circuit, and a large change in the resistance value of the resistor will reduce the control accuracy, resulting in the production of The products and experimental data have large errors, which will cause serious accidents and are not conducive to the development of follow-up related work

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