Patent ID: 8502638

Claim:
A thermistor comprising: a resistive device comprising a first electrically conductive member, a second electrically conductive member and a polymeric material layer laminated therebetween, the polymeric material layer exhibiting positive temperature coefficient behavior; a first insulation layer disposed on the first electrically conductive member; a first electrode electrically coupled to the first electrically conductive member; a second electrode electrically coupled to the second electrically conductive member and being insulated from the first electrode; and a first heat-conductive layer disposed on a surface of the first insulation layer and having a heat conductivity of at least 30 W/m-K and a thickness of between 15-250 μm, wherein the first insulation layer has a surface extending on a first plane, a part of the first electrode and a part of the second electrode are formed on the first plane and associated with the first heat-conductive layer to form a major portion of a first surface of the thermistor, a total area covered on the first surface by the first electrode and the second electrode and the first heat-conductive layer is 40-90% of an area of the first surface; wherein a total area covered on the first surface by the first electrode and the first heat-conductive layer is greater than an area of the second electrode; wherein a center of the first surface is covered by the first heat-conductive layer.