Protectronics Technology Corporation

Der-Yang Liu

Chen-Ron Lin

Ren-Haur Hwang

The present invention discloses a method for preparing a conductive polymeric composite material having carbon black utilized to a structure for composite materials of a positive temperature coefficient thermistor. The method first provides a metal laminated material comprising a top metal layer and a bottom metal layer, an insulating layer between the top and the bottom metal layer, and a conducting through hole disposed between the top metal layer and the bottom metal layer. A composite electroplating process is then performed to form an composite electroplating layer on the surface of the top metal layer, wherein the composite electroplating layer is a continuous porous structure with a secondary aggregation of carbon black and electroplated metal. Finally, a thermal-laminating process is performed to laminate a polymeric composite material on the composite electroplating layer to form the composite materials of the positive temperature coefficient thermistor device, wherein the polymeric composite material is conductive crystallized and filled with the carbon black.

Method for preparing composite materials of a positive temperature coefficient thermistor

The present invention discloses a structure for composite materials of a positive temperature coefficient thermistor and a method of making the same. A carbon black is electroplated onto a surface of the metal electrodes of a metal laminated material to form a continuous porous structure having carbon black. Then a thermal laminating process is used to laminate the metal laminated material and a conductive crystallized polymeric composite material plaque filled with carbon black, to form a fine point between surfaces of the metal electrodes of metal laminated material and the conductive crystallized polymeric composite material plaque filled with carbon black. In the meantime, it can also lower down interfacial resistance by allowing carbon black particles of conductive crystallized polymeric composite material filled with carbon black to fully contact with the surface electroplated layer of the metal electrodes.

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Taoyuan, Taiwan

Der-Yang Liu