Patent ID: 6491834
Filing Date: 2002-12-10
Classification: B41J

Abstract:
A method for manufacturing a liquid discharge head having adischarge port for discharging liquid; a liquid flow path communicating with the discharge port for supplying the liquid to the discharge port; a heat generating element arranged in the liquid flow path for creating a bubble in the liquid; an elemental substrate having the heat generating element therefor; and a movable member arranged for the elemental substrate having a free end thereof on the discharge port side with a gap with the elemental substrate in a position facing the heat generating element on the elemental substrate, the free end of the movable member being displaced on the discharge port side centering on the fulcrum structured near the supporting and fixing portion with the elemental substrate by the pressure exerted by the creation of the bubble for discharging the liquid from the discharge port, said method comprising the following steps of: forming a gap formation member with Al to form the gap between the elemental substrate and the movable member on the surface of the elemental substrate on the heat generating element side, wherein the gap formation member functions as an etching stop layer upon forming the movable member with dry etching; forming a material film for the formation of a movable member to cover the gap formation member; patterning the material film by dry etching; and forming the gap by eluting the gap formation member, wherein the gap formation member is formed with Al being extended to the etching area of the material film.