# US 8,771,792 B2 · Method for manufacturing liquid discharge head

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- Number: US 8,771,792 B2
- Document ID: US8771792B2
- Status: Granted
- Kind: B2
- Application number: 13/013,144
- Filed: 2011-01-25
- Published: 2011-08-11
- Granted: 2014-07-08
- Earliest claimed: 2010-02-09
- Assignees: Canon Kabushiki Kaisha
- Applicants: Kazuhiro Asai; Yoshinori Tagawa; Satoshi Ibe; Hiroyuki Murayama; Kouji Sasaki; Keiji Edamatsu
- Inventors: Kazuhiro Asai; Yoshinori Tagawa; Satoshi Ibe; Hiroyuki Murayama; Kouji Sasaki; Keiji Edamatsu
- Web page: https://patentgrep.com/patent/US8771792B2

## CPC

- B41J 2/1603: {of the front shooter type}
- B41J 2/162: {Manufacturing of the nozzle plates}
- B41J 2/1631: {photolithography}
- B41J 2/1639: {sacrificial molding}
- B41J 2/1645: {thin film formation by spincoating}
- B41J 2002/14475: {characterised by nozzle shapes or number of orifices per chamber}
- Y10T 29/494: Fluidic or fluid actuated device making
- 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

Provided is a method for manufacturing a liquid discharge head, the liquid discharge head includes a substrate provided on a surface with a first energy generating part and a second energy generating part for generating energy utilized for discharging a liquid; a first discharge port provided corresponding to the first energy generating part so as to face the surface; a second discharge port provided corresponding to the second energy generating part so as to face the surface; a first wall member which has a wall of a first liquid flow path which communicates with the first discharge port; and a second wall member which has a wall of a second liquid flow path which communicates the second discharge port, wherein a distance between the second energy generating part and the second discharge port is greater than a distance between the first energy generating part and the first discharge port.

## Claims

### Claim 1

A method for manufacturing a liquid discharge head, the liquid discharge head including: a substrate which is provided on a surface with a first energy generating part and a second energy generating part for generating energy to be utilized for discharging a liquid; a first discharge port through which a liquid is discharged, said first discharge port being provided corresponding to said first energy generating part so as to face said surface; a second discharge port through which a liquid is discharged, said second discharge port being provided corresponding to said second energy generating part so as to face said surface; a first wall member which has a wall of a first flow path for a liquid which communicates with said first discharge port; and a second wall member which has a wall of a second flow path for a liquid which communicates said second discharge port, wherein a distance between said second energy generating part and said second discharge port is greater than a distance between said first energy generating part and said first discharge port,
the method comprising:
providing on said substrate a first mold for said first flow path and a second mold for said second flow path, said first mold corresponding to said first energy generating part, said second mold corresponding to said second energy generating part;
providing a first cover layer to serve as said first wall member so as to cover at least said first mold;
forming said first discharge port and a first portion of said second wall member by removing a part of said first cover layer;
providing a second cover layer to serve as a second portion of said second wall member so as to cover said first portion and said second mold, and so that a distance between said surface and an upper surface of said second cover layer is longer than a distance between said surface and said first discharge port;
forming said second discharge port by removing a part of a portion constituting said upper surface of said second cover layer; and
forming said first flow path by removing said first mold and forming said second flow path by removing said second mold.

### Claim 2 (depends on 1)

A method according to claim 1, comprising providing, after providing said first cover layer and before providing said second cover layer, a liquid-repellent layer including a liquid-repelling material so as to cover said first cover layer.

### Claim 3 (depends on 2)

A method according to claim 2, comprising: providing a liquid-repellent layer including a liquid-repelling material so as to cover said first cover layer, forming said first portion of said second wall member having a liquid-repellent upper surface by removing the part of said first cover layer and a portion corresponding to said part of said first cover layer of said liquid-repellent layer, and providing said second cover layer so as to be in contact with a side surface of said first portion.

### Claim 4 (depends on 1)

A method according to claim 1, wherein a distance between said first energy generating part and said first discharge port is 15 to 30 μm, and a distance between said second energy generating part and said second discharge port is 35 to 80 μm.

### Claim 5 (depends on 1)

A method according to claim 1, wherein said first cover layer and said second cover layer are formed from a negative type photosensitive resin.