Patent ID: 6875365
Filing Date: 2005-04-05
Classification: B41J

Abstract:
1. A method for producing a liquid discharge head provided with a discharge port for discharging liquid, a liquid flow path communicating with said discharge port, and a silicon substrate including a discharge energy generating element for generating energy for liquid discharge and a liquid supply aperture for supplying said liquid flow path with the liquid, the method comprising: a step of forming an anisotropic etching stop layer in a portion wherein the liquid supply aperture is to be formed on a top side of said substrate; a step of forming an insulation layer on said anisotropic etching stop layer; a step of destroying a crystalline structure under said etching stop layer in a liquid supply aperture forming portion on the top side of said substrate, utilizing said insulation layer as a mask, a step of forming, on a rear side of said substrate, an etching mask layer having an aperture corresponding to the liquid supply aperture forming portion on the top side, a step of etching said substrate by anisotropic etching from the aperture until an area where the crystalline structure is destroyed is exposed; and a step of further etching the area where the crystalline structure is destroyed, which has been exposed by said anisotropic etching step, thereby exposing said anisotropic etching stop layer; and a step of eliminating the exposed anisotropic etching stop layer, wherein the destruction of the crystalline structure in the liquid supply aperture forming portion on the top side of said substrate is executed by implantation of impurity ions.