Chip fixed resistor and manufacturing method therefor

Abstract

The invention provides a method for manufacturing a chip-type fixed resistor and the chip-type fixed resistor, and relates to the field of electronic components. Firstly, the first metal electrode layer is formed in a predetermined area on the back of a ceramic substrate; then the alloy foil layer is laminated on the front of the ceramic substrate; and then the alloy foil layer is etched to make the surface of the alloy foil layer Form a patterned resistance pattern; then form a second metal electrode layer in the electrode area of ​​the patterned resistance pattern, and arrange series and parallel resistance lines in the resistance pattern functional area of ​​the patterned resistance pattern; finally, from the inside to the outside outside the alloy foil layer Encapsulating the protective layer and the encapsulation layer in sequence; forming a side electrode layer, a barrier layer and a welding layer at both ends of the ceramic substrate from the inside to the outside. The thickness of the chip fixed resistor is low, which meets the needs of device miniaturization in the current market. It has good repeatability, high product precision, low temperature drift, low noise, good high-frequency characteristics, no inductance and no tolerance, and is convenient for welding.

Description

technical field [0001] The invention relates to the field of electronic components, in particular, to a method for manufacturing a chip-type fixed resistor and the chip-type fixed resistor. 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. A variable resistor for voltage division, with one or two movable metal contacts tightly pressed against the exposed resistor body. The position of the contacts det...

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Problems solved by technology

[0003] At present, most of the high-precision alloy foil fixed resistors on the market are plug-in alloy foil fixed resistors. Plug-in alloy foil fixed resistors include the lead segment of the resistor. The volume is large and the thickness is very high, which does not meet the needs of the miniaturization of components in the market today, and it is a waste of cost. The product consistency is poor, the repeatability is low, the product accuracy is low, the reliability is low, and it is not convenient to weld

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