Ceramics fixing heater containing silicon nitride

Details Ceramics fixing heater containing silicon nitride Ceramics fixing heater containing silicon nitride

G - Physics

03

G

G03G 15/20 (2006.01) H05B 3/14 (2006.01)

Patent

CA 2246919

A heater for fixing a toner image suffers no cracking of the ceramics substrate thereof, has a high connection reliability between an electrode and a connector thereof and capable of attaining an improved fixing speed and a size increase of a transfer material. The heater, which is adapted to heat and fix a toner image on a transfer material, comprises a ceramics substrate containing silicon nitride and a heat generator formed on the ceramics substrate. The thermal conductivity and the transverse rupture strength of the silicon nitride forming the ceramics substrate are preferably at least 40 W/mK and at least 50 kg/mm2 respectively, and the thickness of the ceramics substrate can be reduced to 0.1 to 0.5 mm.

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