Patent ID: 8980110
Filing Date: 2015-03-17
Classification: B41J

Abstract:
1. A method of manufacturing a liquid ejection head comprising a substrate having an ejection energy generating element formed at a first surface side thereof to generate energy for ejecting liquid, a common liquid chamber formed at a second surface side of the substrate that is a side opposite to the first surface side and a liquid supply port extending from a bottom of the common liquid chamber to the first surface side, the method comprising, in listed order: (1) a step of preparing the substrate having the common liquid chamber formed at the second surface side; (2) a step of arranging a material to be filled in the common liquid chamber; (4) a step of forming an aperture in the filled material as corresponding to the liquid supply port to be formed by means of a dry etching technique, using a metal film as a mask for etching the filled material; and (5) a step of forming the liquid supply port by means of a dry etching technique, using at least the filled material having the aperture as a mask.