Chip film fixed resistor and its making method

Abstract

The invention relates to a chip film fixed resistor and its making method. The chip film fixed resistor includes a substrate, a metal resistance layer, inner electrode layers, outer electrode layers and a protection layer, the middle portion of the upper surface of the substrate is provided with the metal resistance layer, the substrate at two sides of the metal resistance layer is coated with the inner electrode layers in a mirror symmetry manner, the two inner electrode layers are connected with the metal resistance layer, the protection layer is covered between the connection portions of the two inner electrode layers and the metal resistance layer, and the inner electrode layers are coated with the outer electrode layers respectively. The resistor made by repeatedly measuring and calculating through a special technology has the advantages of high resistance precision, small temperature coefficient, good moisture resistance and good weldability, and is very suitable for being used in precise electronic circuits, the size of the resistor made through the making technology can be adjusted according to different requirements of power and resistance, the resistance can be 10-1Momega, the minimum value of the thickness of each of the outer electrode layers reaches 0.25mm, and the minimum value of the total length of the resistor reaches 0.8mm.

Description

technical field [0001] The invention belongs to the field of electronic devices, and relates to a resistor, in particular to a chip-type film fixed resistor and a manufacturing method thereof. Background technique [0002] The development direction of resistors is miniaturization and high reliability, so the application field of wirewound resistors is becoming more and more limited, and it is replaced by more and more carbon film or metal film resistors, among which chip metal film fixed resistors More and more popular, according to the difference of resistance value and application field, metal film resistors are divided into thick film and thin film resistors. [0003] Thin film 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 ...

AI Technical Summary

Problems solved by technology

[0003] Thin film 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

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