Patent ID: 8904639
Filing Date: 2014-12-09
Classification: B41J,Y10T

Abstract:
1. A method of producing a liquid ejection head including an ejection port member having ejection ports through which liquid is ejected, and a flow-path-wall member having inner walls of liquid flow paths through which liquid is supplied to the ejection ports, the method comprising, in sequence, the steps of: preparing a substrate having the flow-path-wall member on or above the substrate; bonding the flow-path-wall member to a resin layer that is composed of a photo-curing resin and serves as the ejection port member such that spaces serving as the flow paths are provided between the substrate and the photo-curing resin; providing through-holes in the resin layer such that the spaces communicate with the outside air; exposing part of the resin layer to light to form an exposed portion and an unexposed portion; heating the exposed portion of the resin layer; and removing the unexposed portion from the heated resin layer to form the ejection ports, thereby forming the ejection port member.