Surface attaching type PTC (positive temperature coefficient) thermosensitive resistor and manufacture method thereof

A thermistor, mounting type technology, applied in the direction of resistors, resistors with a positive temperature coefficient, resistor manufacturing, etc., can solve the problem of resistors losing the PTC effect, to prevent oxidation, improve weather resistance, production The effect of improving efficiency

Inactive Publication Date: 2010-06-16
SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the existing surface mount type PTC resistance elements, the side of the core material is exposed to the air, during use, as time goes on, the oxygen or moisture in the air will gradually mix with the polymer in the PTC core material. Or the chemical action of conductive particles, so that the resistor loses the PTC effect

Method used

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  • Surface attaching type PTC (positive temperature coefficient) thermosensitive resistor and manufacture method thereof
  • Surface attaching type PTC (positive temperature coefficient) thermosensitive resistor and manufacture method thereof
  • Surface attaching type PTC (positive temperature coefficient) thermosensitive resistor and manufacture method thereof

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Embodiment Construction

[0050] see figure 1 It is a schematic diagram of the decomposition structure of the present invention, figure 2 It is the schematic diagram of the sectional structure of the present invention and Figure 6 As shown in the perspective view of the surface mount type polymer PTC thermistor of the present invention, a surface mount type PTC thermistor includes a chip 5, and the chip 5 is covered by a core material 7 and covered on the core material 7. Two metal electrodes 8, 9 are formed on the surface, and the chip 5 is covered by an epoxy resin layer 6, and the upper and lower surfaces are pasted with semi-cured resin materials 4, 4' and external electrodes 1, 1' to form a composite core material. The chip surface electrodes 8, 9 are connected with the external electrodes 1, 1' through the product terminal through hole 2 and the product internal through hole 3. Chemical etching process is used to remove part of the metal foil on the outer surface, thereby forming the path of ...

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Abstract

The invention relates to surface attaching type PTC (positive temperature coefficient) thermosensitive resistor and manufacture method thereof. The surface attaching type PTC thermosensitive resistor is used for being installed in a specific circuit, plays a role of overcurrent protection and comprises a chip, semi-solidification resin materials and an outer surface end electrode, wherein the chip comprises a core material and metal electrodes which are attached to and cover both surfaces of the core material; an epoxy resin layer is coated on the periphery of the chip; and the semi-solidification resin materials are coated on both surfaces of the electrode. By sealing an epoxy resin material outside a composite core material, the isolation between the chip and air is ensured, thereby effectively preventing the oxidation of a composite conducting material and improving the weather resistance of the macromolecule PTC thermosensitive resistor. The invention is manufactured by a printed circuit board process, has simple production process and improves the production efficiency.

Description

technical field [0001] The present invention relates to electronic components and devices with conductive polymer composite material as the main raw material, especially a surface-mounted PTC thermistor and its preparation method, which are used to install in a specific circuit for over-current protection effect. Background technique [0002] Most of the existing surface mount type PTC resistance elements, the side of the core material is exposed to the air, during use, as time goes on, the oxygen or moisture in the air will gradually mix with the polymer in the PTC core material. Or the chemical action of conductive particles will cause the resistor to lose the PTC effect. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a surface-mounted PTC thermistor, the core material is surrounded by an epoxy resin layer and an outer protective layer, which is not easy to be exposed to oxygen and moisture, and increases the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/02H01C1/02H01C1/14H01C17/00
Inventor 刘玉堂刘正平王军吴国臣
Owner SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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