PRINT HEAD AND MANUFACTURE THEREOF

PROBLEM TO BE SOLVED: To obtain an ink drop having a low weight by a method wherein a metal film formed on a mandrel is removed and heated, the removed metal film is cut into small parts and then the small parts are laminated and heated. SOLUTION: In order to realize a thin orifice plate, long time heat treatment and gentle sintering are carried out in the production process of orifice plate. Metal deposition is stopped when the nominal thickness of the orifice plate becomes 28 μm. The thin electroforming article is then subjected to heat treatment and gentle sintering. Subsequently, the thin electroforming article is shorn into individual orifice plates and fixed to a barrier layer. The barrier layer is then thermally set in order to bond a semiconductor substrate and the orifice plate to a laminate structure provided with a print head. The orifice plate is fixed to the barrier layer by applying heat (about 200 deg.C) and pressure (50-250 psi) for 15 min or less. Finally, it is subjected to heat equalizing treatment at about 220 deg.C for about 30 min for the purpose of final preparation of a polymer an hardening of a binder.