Patent ID: 7089665
Filing Date: 2006-08-15
Classification: B41J,Y10T

Abstract:
1. A method for fabricating a monolithic fluid injection device, comprising the steps of: providing a substrate having a first surface and a second surface; forming a patterned sacrificial layer on the first surface of the substrate; forming a patterned structure layer on the first surface of the substrate and covering the patterned sacrificial layer; forming a patterned resistive layer on the structure layer as a heater; forming a patterned insulating layer on the structure layer, the patterned insulating layer having a heater contact opening and a first opening, wherein the heater contact opening exposes at least part of the heater; forming a patterned conductive layer overlying the structure layer and connecting the heater via the heater contact opening to form a signal transmitting circuit; forming a patterned protective layer overlying the substrate and covering the insulating layer and the conductive layer, the protective layer having a signal transmitting circuit contact opening and a second opening corresponding to the first opening; forming a fluid channel in the second surface of the substrate, opposing the first surface, and exposing the sacrificial layer; removing the sacrificial layer to form a fluid chamber; and etching the structure layer along the first and second openings to form an orifice connecting the fluid chamber, wherein the heater contact opening and the first opening are formed simultaneously.