Patent ID: 7533971
Filing Date: 2009-05-19
Classification: B41J

Abstract:
1. A head of a bubble-jet type inkjet printer, comprising: a heater substrate having a substrate, a heat proof layer formed on the substrate, and a heater formed on the heat proof layer; a passivation layer formed on the heater and the heat proof layer, having a portion connected to the substrate through the heat proof layer; an intermediate layer formed on the passivation layer to be electrically connected to the substrate of the heater substrate through the portion of the passivation layer; and a nozzle plate having a nozzle, forming an ink chamber with the heater substrate, stacked on the intermediate layer, and bonded to intermediate layer by an electric field formed between the heater substrate and the nozzle plate through the portion of the passivation layer, wherein the passivation layer comprises: an insulating film formed on the heater and the heat proof layer on which the heater is not formed; an heater protection layer formed on the insulating film and having the portion passing through the insulating film and the heat proof layer to contact the substrate of the heater substrate to form the electric field.