Patent ID: 6241905
Filing Date: 2001-06-05
Classification: B41J,H04N

Abstract:
A method of manufacture of an ink jet printhead, said method comprising the steps of:(a) providing an initial semiconductor wafer having an electrical circuitry layer formed thereon;(b) etching a nozzle ink inlet hole in the electrical circuitry layer in addition to a series of vias at predetermined positions interconnecting with the electrical circuitry layer;(c) depositing a first sacrificial material layer over the electrical circuitry layer including filling said nozzle ink inlet hole, and etching an actuator anchor in the first sacrificial material layer so that the anchor is located around the vias;(d) depositing a first expansion material layer of a material having a desired coefficient of thermal expansion, and etching predetermined vias in the first expansion material layer;(e) depositing and etching a first conductive layer on the first expansion material layer, the first conductive material layer being conductively interconnected to the electrical circuitry layer via said vias;(f) depositing a second expansion material layer of a material having a desired coefficient of thermal expansion, and etching the second expansion material layer to form a disk centered substantially about the vias and incorporating a combination of the first and second expansion material layers and the conductive material layer;(g) depositing a second sacrificial material layer, and etching the second sacrificial material layer to form a nozzle chamber mould;(h) depositing an inert material layer over the second sacrificial material layer, etching the inert material layer to form a nozzle chamber around the disk and etching a nozzle ejection port in the inert material layer;(i) etching an ink supply channel through the wafer; and(j) etching away the sacrificial layers.