Patent ID: 7866799
Filing Date: 2011-01-11
Classification: B41J

Abstract:
1. A liquid discharge head comprising: a substrate which has a heat generating element for generating a bubble in a liquid; a first wall member provided with a discharge port for discharging liquid and facing the heat generating element; a liquid channel communicating with the discharge port formed between the substrate and the first wall member, and including a protrusion portion protruding from a surface of the first wall member toward the heat generating element, wherein a projection of an end portion of the protrusion portion is completely within a perimeter of the heat generating element when viewed from the discharge port toward the substrate; and a second wall member provided around the protrusion portion and protruding toward the first wall member from a surface of the substrate such that a gap between an end portion of the second wall member and the first wall member and a gap between the end portion of the second wall member and the protrusion portion form a portion of the channel and the end portion of the protrusion portion is closer to the heat generating element than the end portion of the second wall member.