Polymer PTC thermistor and manufacturing method thereof

A technology of thermistors and polymers, applied in the direction of resistors with positive temperature coefficients, etc., which can solve the problems of inconvenience in actual production and many polymer PTC material formulations, and achieve the effects of reducing production costs and simple production processes

Inactive Publication Date: 2004-09-15
SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there are many product models, more polymer PTC material formulations are required, which brings inconvenience to actual production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Press 4 layers of polymer PTC chip A with a thickness of 0.5mm and a resistivity of 5Ω·cm into a composite core material with a thickness of 2.0mm, and then stick metal nickel foil on both sides of the composite core material, and cut it into a size of 5mm*5mm Small pieces, and connecting leads at both ends of the electrodes, to obtain a polymer PTC thermistor with a resistance value of 4Ω.

Embodiment 2

[0016] Three layers of polymer PTC chip A with a thickness of 0.5mm and a resistivity of 5Ω.cm and a layer of polymer PTC chip B with a thickness of 0.5mm and a resistivity of 25Ω.cm are pressed into a composite core material with a thickness of 2.0mm. The core material is covered with metal nickel foil on both sides, cut into small pieces with a size of 5mm*5mm, and leads are connected at both ends of the electrodes to obtain a polymer PTC thermistor with a resistance value of 8Ω.

Embodiment 3

[0018] Two layers of polymer PTC chip A with a thickness of 0.5mm and a resistivity of 5Ω.cm and two layers of a polymer PTC chip B with a thickness of 0.5mm and a resistivity of 25Ω.cm were pressed into a composite core material with a thickness of 2.0mm, and then in the composite core material. The core material is covered with metal nickel foil on both sides, cut into small pieces with a size of 5mm*5mm, and leads are connected at both ends of the electrodes to obtain a polymer PTC thermistor with a resistance value of 12Ω.

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Abstract

Composite material of conduction high polymer is as main material of high polymer PTC thermistor. PTC thermistor comprises core material and metal electrodes adhibited on two surfaces of core material. Composed multiple layers of chips possessing PTC characters constitutes core material of thermistor. Method for manufacturing PTC thermistor includes steps: piling up multiple layers of chips possessing PTC characters to produce composed chip; then, metal electrodes are adhibited on two surfaces of core material; cutting PTC thermistor according to required size. In the invention, major types of PTC thermistor are made from lesser PTC material formula under fixed outline size of product relatively. The invented PTC thermistor is applicable to areas of communication, computer, industrial control and household electrical appliances.

Description

technical field [0001] The invention relates to an electronic component made of a conductive polymer composite material as the main raw material, in particular to a polymer PTC thermistor with a composite core material and a manufacturing method thereof. Background technique [0002] Crystalline or semi-crystalline polymer composites filled with conductive particles can exhibit a positive temperature coefficient (PTC) phenomenon. That is to say, within a certain temperature range, its own resistivity will increase with the increase of temperature. Such conductors with PTC characteristics have been made into thermistors, which are used in overcurrent protection of circuits. Under normal conditions, the current in the circuit is relatively small and the thermistor temperature is low, and when a large current flows through this thermistor caused by a circuit fault, its temperature suddenly rises to the "off" temperature , causing its resistance value to become very large, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/02
Inventor 侯李明王军秦玉廷杨兆国
Owner SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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