Patent ID: 8366950
Filing Date: 2013-02-05
Classification: B41J

Abstract:
1. A method for manufacturing a liquid-ejection head substrate including a silicon substrate having a supply port for supplying liquid, the method comprising: providing a silicon substrate having an etching mask layer on a first surface thereof, the etching mask layer having an opening in a portion corresponding to the supply port; forming a first recess, where a <100> plane is exposed in the first surface of the silicon substrate by anisotropically etching the silicon substrate through the opening in the etching mask layer; forming a second recess by irradiating the exposed <100> plane with a laser beam from the first surface side in a part of the exposed <100> plane of the first recess, the second recess extending toward a second surface of the silicon substrate, which is a surface opposite the first surface of the silicon substrate; and forming the supply port by anisotropically etching the silicon substrate from the second recess.