Process for the manufacture of thermal ink jet printing heads and heads obtained in this way.

摘要

Each thermal ink jet printing head (1) comprises a multi-layer plate in which layers of metals and of insulating materials are successively deposited under vacuum on a silicon base plate (20). The ink is contained in expulsion chambers (4) formed by a photolithographic process in a layer of photosensitive resin (74) and is expelled by the effect of rapid heating of resistive elements (8) contained within the expulsion chambers through nozzles (5) disposed in two rows side by side and produced in a metal lamina stuck to the resin layer. The expulsion chambers communicate with a main reservoir through a common ink feed duct (14) in the form of a slot or groove disposed between the two rows of nozzles and cut through the silicon plate (20) partly by an etching process and partly by a sandblasting process or with a special type of laser (excimer).