Patent ID: 8157353
Filing Date: 2012-04-17
Classification: B41J

Abstract:
1. A liquid ejection recording head comprising: a recording element substrate comprising a plurality of energy generating elements for generating energy for ejecting liquid; and a flow passage forming-member, connected to said recording element substrate, comprising a plurality of ejection outlets arranged correspondingly to the plurality of energy generating elements and comprising a plurality of flow passages communicating with the ejection outlets, wherein said flow passage-forming member includes a hole array which is provided in parallel to at least one ejection array of the ejection outlets, and wherein the hole array includes: holes penetrating through said flow passage-forming member, a bridging portion, formed between adjacent holes, for connecting holes of the hole array and an outer peripheral surface of said flow passage-forming member, and a communication passage, for establishing communication between the adjacent holes, at a position located at a side of the bridging portion closer to said recording element substrate.