Patent ID: 8752936

Claim:
A liquid ejection head, comprising: an ejection face having a plurality of recessed portions each having a bottom portion, the plurality of recessed portions including a recessed portion that has at least one ejection opening formed in the bottom portion for ejecting liquid, the plurality of recessed portions each having two side faces in one direction parallel to the ejection face, wherein a liquid repellent layer is formed on the bottom portion, wherein, in the plurality of recessed portions, where a distance d 1 is a distance, in the one direction, between (i) a center of the ejection opening formed in one recessed portion and (ii) an other-side side face as one of the two side faces of another recessed portion adjacent to the one recessed portion on one side in the one direction without interposing any other recessed portions between the one recessed portion and said another recessed portion in the one direction, where a distance d 2 is a distance in the one direction between (i) the center of the ejection opening and (ii) a one-side side face as one of the two side faces of another recessed portion adjacent to the one recessed portion on the other side in the one direction without interposing any other recessed portions between the one recessed portion and said another recessed portion in the one direction, and where a distance x 1 is a distance in the one direction between the center of the ejection opening and a one-side side face as one of the two side faces of the one recessed portion, and a distance x 2 is a distance in the one direction between the center of the ejection opening and an other-side side face as the other of the two side faces of the one recessed portion, and where a distance D 1 is a distance in the one direction between the one-side side face of the one recessed portion and the other-side side face of said another recessed portion adjacent to the one recessed portion on the one side without interposing any other recessed portions between the one recessed portion and said another recessed portion, and where a distance D 2 is a distance in the one direction between the other-side side face of the one recessed portion and the one-side side face of said another recessed portion adjacent to the one recessed portion on the other side without interposing any other recessed portions between the one recessed portion and said another recessed portion, a central position of a bottom portion of the one recessed portion in the one direction is positioned relative to the center of the ejection opening formed in the one recessed portion such that the distance d 1 is greater than the distance d 2 and such that the distance x 1 is greater than the distance x 2 , and wherein the plurality of recessed portions are formed on the bottom portion such that the distance D 1 is greater than the distance D 2 .