Patent ID: 6858152
Filing Date: 2005-02-22
Classification: B41J,Y10T

Abstract:
1. A method for manufacturing a liquid discharge head, comprising: a step for preparing an Si substrate having a first surface as an element forming surface and a second surface as a back surface opposite to the first surface; a step for effecting heat treatment by heating of said Si substrate; a step for forming an SiO a step for forming an etching start opening portion in said SiO a step for forming a liquid discharge energy generating element for generating energy for discharging liquid on the first surface of said Si substrate; and a step for forming a liquid supply port passing through said Si substrate and communicated with the first surface from said etching start opening portion by anisotropic etching of Si using said SiO wherein, before the anisotropic etching is effected, the density of oxidation induced laminate defects existing in an interface between said Si substrate and said SiO