# US 9,873,255 B2 · Liquid ejection head and method of manufacturing the same

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- Number: US 9,873,255 B2
- Document ID: US9873255B2
- Status: Granted
- Kind: B2
- Application number: 15/079,499
- Filed: 2016-03-24
- Published: 2016-10-27
- Granted: 2018-01-23
- Earliest claimed: 2015-04-27
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Koji Sasaki; Kenji Fujii; Jun Yamamuro; Kazuhiro Asai; Seiichiro Yaginuma; Keiji Matsumoto; Kunihito Uohashi; Masahisa Watanabe; Tomohiko Nakano; Keiji Edamatsu; Haruka Nakada
- Web page: https://patentgrep.com/patent/US9873255B2

## CPC

- B41J 2/162: {Manufacturing of the nozzle plates}
- B41J 2/1603: {of the front shooter type}
- B41J 2/1631: {photolithography}
- B41J 2/1632: {machining}
- B41J 2/1639: {sacrificial molding}
- B41J 2/1645: {thin film formation by spincoating}
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

A liquid ejection head includes a substrate having an energy generating element arranged therein and an ejection port forming member laid as superposed above the substrate. At least one ejection port is formed so as to run through the ejection port forming member. The ejection port forming member has a concave portion including the ejection port formed therein on the surface thereof opposite to the surface thereof facing the substrate, and has a convex portion on the surface of the ejection port forming member facing the substrate so as to correspond to the concave portion.

## Claims

### Claim 1

A liquid ejection head comprising:
a substrate having an energy generating element arranged therein;
an ejection port forming member laid so as to be superposed above the substrate, an ejection port being formed so as to run through the ejection port forming member, a port region of the ejection port forming member including the ejection port having a concave portion formed in the surface thereof opposite to the surface thereof facing the substrate, a convex portion being formed in the surface of the ejection port forming member facing the substrate so as to correspond to the concave portion;
a flow path forming member arranged between the ejection port forming member and the substrate so as to constitute the lateral wall of a pressure chamber; and
a hollow pattern layer arranged between the flow path forming member and the substrate and having a hollow therein, wherein
the ejection port and a feed path arranged in the substrate communicate with each other by way of the pressure chamber, and
the ejection port forming member is partly deformed toward the hollow of the hollow pattern layer.

### Claim 2 (depends on 1)

The liquid ejection head according to claim 1, wherein
the thickness of the port region of the ejection port forming member is equal to the thickness of all the remaining regions of the ejection port forming member.