Patent ID: 6251298
Filing Date: 2001-06-26
Classification: B41J,G06K,G11C,H04N

Abstract:
A method of manufacture of an ink jet printhead including a series of nozzle chambers, the method comprising the steps of:(a) providing a semiconductor wafer having an electrical circuitry layer and a buried epitaxial layer formed thereon;(b) etching a nozzle chamber aperture in the electrical circuitry layer and a nozzle chamber, interconnected with the aperture, in the semiconductor wafer;(c) depositing a first sacrificial layer filling the nozzle chamber;(d) depositing an inert material layer over the nozzle chamber aperture and etching the inert material layer;(e) depositing a first conductive material layer and etching the first conductive material layer to define a lower electrical coil portion interconnected with the electrical circuitry layer;(f) depositing an inert material layer over the first conductive material layer and etching the inert material layer to define predetermined vias for interconnection of the first conductive material layer with subsequent layers;(g) depositing a second sacrificial layer and etching the second sacrificial layer to define a mould for a fixed magnetic pole, a pivot, a series of springs and spring posts;(h) depositing a high saturation flux material layer and etching the high saturation flux material layer to form the fixed magnetic pole, the pivot, interconnected shutters and lever arm, the springs and the spring posts;(i) depositing a second inert material layer over the high saturation flux material layer and etching the second inert material layer to define predetermined vias for interconnection of lower layers with subsequent layers;(j) depositing a second conductive material layer and etching the second conductive material layer to define a side portion of an electrical coil interconnected with the first conductive material layer;(k) depositing a third conductive material layer and etching the third conductive material layer to define a top portion of the electrical coil interconnected with the second conductive material layer;(l) depositing a top inert material layer and etching the top inert material layer to define a corrosion barrier;(m) back etching the wafer to the epitaxial layer;(n) etching a nozzle aperture in the epitaxial layer; and(o) etching away the sacrificial layers.