Patent ID: 9421773
Filing Date: 2016-08-23
CPC Classification: B41J,Y10T

Claim Text:
1. A process for producing a liquid ejection head comprising an ejection orifice forming member in which an ejection orifice for ejecting a liquid has been formed, and a substrate having an ejection-energy-generating element for generating energy for ejecting a liquid from the ejection orifice on the side of a first surface thereof, the process comprising the steps of: (1) providing a film having a support, a first layer and a second layer in this order, (2) arranging the film on the substrate in such a manner that the second layer faces the first surface followed by detaching the support from the film, (3) forming the ejection orifice in the second layer, and (4) removing at least a part of the first layer from the second layer, wherein the part of the first layer is on a region of the second layer other than a region thereof where the ejection orifice is formed.