| 摘要 |
PROBLEM TO BE SOLVED: To provide a planar heater having durability against thermal shock, capable of preventing board breakage, of keeping heat equalization capability over the total length of the heater, of effectively using calorific power of the heater for a fixing process, and of being manufactured at a low cost; and to provide its manufacturing method and a fixing device using it. SOLUTION: This planar heater is so composed that a metallic electric resistance heating element 2 is stacked on and integrated with a polyimide resin powder mold board 1; a heat-resistant insulation layer 5 is overlaid on it and all of them are integrated; and an opening 7 for supplying power is formed in a terminal part 3 of the heating element 2. Since the polyimide resin powder mold board is strong against thermal shock by repetition of heating and cooling, its breakage hardly occurs. Since the planar heater has high heat equalization capability over the total length of the heater and radiates little heat, the calorific power of the heater can effectively used for a fixing process. COPYRIGHT: (C)2005,JPO&NCIPI
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