Patent ID: 6704996
Filing Date: 2004-03-16
Classification: B41J,Y10T

Abstract:
A method for reducing ink corrosion of exposed metal layers on a chip surface of a semiconductor chip for an ink jet printhead, the chip having an elongate ink feed via and ink ejectors adjacent the ink feed via, the method comprising the steps of depositing a protective layer in a plasma process to the chip surface, the protective layer having a height and being deposited adjacent the ink ejectors so that the protective layer substantially circumscribes the ink via, and applying a thick film layer to the protective layer and chip, whereby the protective layer and thick film layer are sufficient to promote increased adhesion between the thick film layer and a nozzle plate attached to the thick film layer thereby substantially reducing a tendency for the nozzle plate and thick film layer to delaminate from one another during printhead manufacture or use and interrupting contact between ink and the exposed metal layers or contact pads on the chip surface.