JP2010165467A5 - - Google Patents

Claims (5)

A heat-resistant and insulating long flat ceramic substrate;
A heating resistor formed on the ceramic substrate and having a length in the short direction and a width in the long direction of the ceramic substrate ;
First and second wiring patterns respectively formed at both ends of the heating resistor in the longitudinal direction so as to be connected to the heating resistor;
Said first way is connected to a longitudinal central portion of the ceramic substrate of the wiring pattern, a first electrode formed on the ceramic substrate,
And as mentioned above is connected to the longitudinal center portion of the ceramic substrate, a second electrode formed on the ceramic substrate of the second wiring pattern,
An insulating overcoat layer for protecting the heating resistor,
The first and first wiring patterns have a resistance temperature coefficient of 3000 ppm / ° C. or more, and a sub-heating resistor having a resistance value different from that of the heating resistor is electrically connected to the central portion of the heating resistor. Sub-wiring patterns having resistance values different from those of the first and second wiring patterns are formed on both ends of the central portion of the first and second wiring patterns . A ceramic heater characterized by that. The back side of the first electrode and connecting the other end of the said the connections with one end of the heating resistor second electrode and the heating resistor, the ceramic substrate having the heat generating resistor is formed, The ceramic heater according to claim 1 , wherein the ceramic heater is connected through a through hole. Formed on the first electrode and connecting the other end of the said the connections with one end of the heating resistor second electrode and the heating resistor, the ceramic substrate and the same surface of the heat generating resistor is formed the ceramic heater according to claim 1 or 2, characterized in that connected by connection pattern.   A pressure roller;
  The ceramic heater according to any one of claims 1 to 3, wherein the heating resistor is disposed so as to face the pressure roller.
  And a fixing film movably provided between the ceramic substrate and the pressure roller.   Image forming means for attaching toner to an electrostatic latent image formed on a medium and further transferring the toner to paper to form an image;
  A heating device according to claim 4,
  An image forming apparatus, wherein the sheet on which the image is formed is passed through a fixing film while being pressed against the heater by a pressure roller to fix the toner on the sheet.