Ceramic fixing heater containing silicon nitride

Details Ceramic fixing heater containing silicon nitride Ceramic fixing heater containing silicon nitride

1998-09-15

2000-06-20

Walberg, Teresa

Electric heating

Heating devices

Combined with diverse-type art device

219469, 219487, 399330, H05B 100

Patent

active

060780274

ABSTRACT:
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/mm.sup.2 respectively, and the thickness of the ceramics substrate can be reduced to 0.1 to 0.5 mm.

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