Patent ID: 6529224
Filing Date: 2003-03-04
Classification: B41J

Abstract:
A thermal head comprising:a heat insulation layer formed on a heat radiation substrate; a bridge layer of one of cermet and ceramic material is formed on the heat insulation layer, a cavity disposed between a portion of the bridge layer and the heat insulation layer, a plurality of slits disposed in the portion of the bridge layer overlying the cavity to expose the cavity; a highly adiabatic inorganic heat insulation layer formed on a portion of the bridge layer that includes the slits; an inorganic protective layer of a material selected from among one of silicon and aluminum oxide, nitride and carbide formed on the inorganic heat insulation layer; a plurality of heating elements lined up on the inorganic protective layer and formed between neighboring slits; and an abrasion-resistant layer covering at least top surfaces of the heating elements.