| 摘要 |
The present invention provides a polymeric positive temperature coefficient thermistor, which comprises a first electrode, a second electrode, and a polyimide film sandwiched in between, which comprises (A) a polyimide resin, and (B) nickel powder used to blend with the polyimide resin, wherein the polyimide film has a thickness from 10 to 100 mum, and the filling proportion of the nickel powder within the polyimide resin reaches a critical volume fraction or above. A process for preparing the above mentioned thermistor is also provided.
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