Preparation process of chip-type fixed resistor with good stability

Abstract

The invention relates to a preparation process of a chip-type fixed resistor with good stability. The preparation process comprises the following steps: cutting a resistor body according to a specified technological size, and respectively transversely and longitudinally arranging slots on the upper surface and the lower surface of the resistor body; printing a negative electrode on the back surface of a base plate substrate, wherein the negative electrode is arranged on a transverse cutting line between a longitudinal cutting line and through holes adjacent to the longitudinal cutting line as well as transverse cutting lines among the through holes; printing a positive electrode on the front surface of the base plate substrate, and performing the molding processing by aligning the positive electrode to the negative electrode; and then molding, washing and nickel plating to obtain the chip-type fixed resistor. By adopting a way for printing a surface electrode on the positive electrode of the base plate substrate, the surface electrode can sufficiently fill and cover the part of the front electrode on the transverse cutting lines, so that a coated conductive layer is firmly combined with the back surface electrode and the surface electrode, and the stability of the resistor is better.

Description

technical field [0001] The invention belongs to the field of electronic devices, in particular to a preparation process of a chip-type fixed resistor with good stability. 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 b...

AI Technical Summary

Problems solved by technology

[0004] Micro-resistors are mainly used in precision electronic circuits, but due to volume limitations, the structure of the metal film and the electrodes in the resistor needs to be accurately calculated, and in order to increase the applicability of the resistor, its resistance range needs a larger span, so To ensure the reliability of its use, but the existing chip-type thin film fixed resistor has a high failure rate, and what is more serious is that the resistance value deviation is large, which is easy to cause damage to the circuit