Patent ID: 9102145
Filing Date: 2015-08-11
Classification: B41J

Abstract:
1. A method for producing a liquid ejecting head comprising a substrate having an ejection energy generating element that generates energy for ejecting a liquid, on its first face, and an independent supply port that reaches the first face from a side of a second face that is opposite to the first face, the method comprising: (1) a step of forming an etching stop layer on a portion corresponding to a region in which the independent supply port is formed, on the first face; (2) a step of conducting a dry etching treatment for the substrate from the second face side until an etched portion reaches the etching stop layer; and (3) a step of removing the etching stop layer by isotropic etching to form the independent supply port, after having conducted the dry etching treatment, wherein the isotropic etching is conducted in such a state that a side etching stopper portion having an etching resistance to the isotropic etching is formed in a side face perimeter of the etching stop layer, and wherein the side etching stopper portion comprises a metal containing Ta as a main component.