Patent ID: 8021562
Filing Date: 2011-09-20
Classification: B41J

Abstract:
1. A method for manufacturing a substrate for a liquid discharge head, comprising: disposing a first etching mask formed of a resin, including two portions, one portion of which has a wider width than the other portion, the other portion of which has a narrower width than the one portion, on the substrate; heating the first etching mask at a temperature equal to or higher than a glass transition point of the resin; disposing a second mask having an opening on the substrate and surrounding the first mask; and forming a hole at a part of the substrate corresponding to the other portion having a narrower width than the one portion of the first etching mask by performing etching on the substrate, having the first etching mask as a mask, and by having etching advance at the part of the substrate corresponding to the other portion having a narrower width than the one portion of the first etching mask.