| 摘要 |
PROBLEM TO BE SOLVED: To use power source of high voltage stably by forming an electrode layer respectively on PTC heating element layers separately-formed at a plurality of areas on an insulating base material, and providing an intermediate electrode layer for bridging two PTC heating element layers at equal intervals as the respective electrode layers. SOLUTION: PTC heating element layers 3, 3, are formed on a insulating film 2, for example, which are separated at two positions and meet the power source voltage of 100 V. The first and second electrode layers 4, 5 consisting of a plurality of comb-teeth shaped pattern are formed, which extend from a main pattern at equal intervals facing each other to the right and left. An intermediate electrode layer 6 is formed, which consists of the main pattern formed along a slot 2a at a part where the PTC heating element layer 3 is not formed in the central part of the insulating film 2, and the comb-teeth shaped pattern extending to the right and left from it at equal intervals between the respective comb-teeth patterns of the electrode layers 4, 5. It is thus possible to obtain a PTC surfaced heating element 1 which can be used by applying high voltage of 200 V to the electrode layers 4, 5 from a power source 8. |
