# US 9,517,625 B2 · Liquid discharge head and method of manufacturing the same

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- Number: US 9,517,625 B2
- Document ID: US9517625B2
- Status: Granted
- Kind: B2
- Application number: 14/076,426
- Filed: 2013-11-11
- Published: 2014-05-15
- Granted: 2016-12-13
- Earliest claimed: 2012-11-15
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Akio Goto; Hiroshi Higuchi
- Web page: https://patentgrep.com/patent/US9517625B2

## CPC

- B41J 2/1621: {Manufacturing processes}
- B41J 2/1603: {of the front shooter type}
- B41J 2/1628: {dry etching}
- B41J 2/1629: {wet etching}
- B41J 2/1631: {photolithography}
- B41J 2/1639: {sacrificial molding}
- B41J 2/1642: {thin film formation by CVD [chemical vapor deposition]}
- B41J 2/1645: {thin film formation by spincoating}
- B41J 2/1646: {thin film formation by sputtering}
- Y10T 29/49401: Fluid pattern dispersing device making, e.g., ink jet
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A liquid discharge head includes a substrate and a flow-path-forming member that forms a plurality of flow paths and discharge ports that are in communication with the flow paths on the substrate. Liquid is to be discharged from the discharge ports. A space is formed between the plurality of flow paths and is filled with a filling material. In the case where a direction in which the liquid is to be discharged from the discharge ports is an upward direction, a top surface of the filling material is positioned at the same height as a face surface of the flow-path-forming member or is positioned higher than the face surface of the flow-path-forming member in the upward direction.

## Claims

### Claim 1

A liquid discharge head comprising:
a substrate;
a flow-path-forming member comprising a plurality of flow paths and discharge ports formed therein, wherein the discharge ports are in communication with the plurality of flow paths on the substrate; and
a filling material filled in a space between the plurality of flow paths, the filling material having a top surface position higher than a top surface of the flow-path-forming member, and a bottom surface position lower than the top surface of the flow-path-forming member in a case where liquid is discharge from the discharge ports in an upward direction.

### Claim 2 (depends on 1)

The liquid discharge head according to claim 1, wherein the flow-path-forming member is made of an inorganic material.

### Claim 3 (depends on 1)

The liquid discharge head according to claim 1, wherein the filling material is made of a resin.

### Claim 4 (depends on 1)

The liquid discharge head according to claim 1, wherein the top surface of the filling material is sealed with a seal member.

### Claim 5 (depends on 4)

The liquid discharge head according to claim 4, wherein the seal member is formed in such a manner as to extend from the top surface of the filling material to the face surface of the flow-path-forming member and forms the discharge ports together with the flow-path-forming member.

### Claim 6 (depends on 1)

The liquid discharge head according to claim 1, wherein the flow-path-forming member is made of at least one of silicon nitride, silicon dioxide, silicon carbide, and silicon carbonitride.