Patent ID: 9421771
Filing Date: 2016-08-23
CPC Classification: B29C,B29K,B29L,B32B,B41J,F16B,Y10T

Claim Text:
1. A liquid ejection head comprising: a recording element substrate that ejects liquid; and an element-substrate support member to which the recording element substrate is bonded with an adhesive, wherein a groove to be filled with the adhesive is provided in a bonding region of the element-substrate support member, at which the element-substrate support member and the recording element substrate are bonded together, along a part or an entirety of an outer circumference of the recording element substrate, wherein the recording element substrate includes a first recording element substrate and a second recording element substrate that has a planar aspect ratio smaller than a planar aspect ratio of the first recording element substrate, wherein the groove is provided in a bonding region of the element-substrate support member, at which the element-substrate support member and the first recording element substrate are bonded together, along a short side of the outer circumference of the first recording element substrate, and no groove is provided along a long side of the outer circumference of the first recording element substrate, and wherein the groove is provided in a bonding region of the element-substrate support member, at which the element-substrate support member and the second recording element substrate are bonded together, along each of a short side and a long side of the outer circumference of the second recording element substrate.