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Application filed by Polytronics Technology CorpfiledCriticalPolytronics Technology Corp
Priority to TW94108925ApriorityCriticalpatent/TWI279956B/en
Publication of TW200635166ApublicationCriticalpatent/TW200635166A/en
Application grantedgrantedCritical
Publication of TWI279956BpublicationCriticalpatent/TWI279956B/en
The present invention relates to an over-current protection device, which comprises a positive temperature coefficient element, two thermal conductive insulation layers and a plurality of heat dissipation cylinders. The positive temperature coefficient element includes a current sensing layer and two first internal electrode layers, of which the first internal electrode layers are separately disposed on the upper and lower surfaces of the current sensing layer. The two thermal conductive insulation layers are separately disposed on the upper and lower surfaces of the positive temperature coefficient element. Moreover, the plurality of heat dissipation cylinders passes through the conductive insulating layer, and is connected to the first internal electrode layer.
Method for producing a subminiature "micro-chip" oxygen sensor for control of internal combustion engines or other combustion processes, oxygen sensor and an exhaust safety switch