Title:
LIQUID EJECTION HEAD AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2020037234
Kind Code:
A
Abstract:
To improve electrical reliability.SOLUTION: A liquid ejection head comprises: a substrate 2 including energy generation elements 19 that apply ejecting energy to a liquid, and a substrate upper surface 18 provided with a terminal 11 to which an electric wire 12 is connected to transmit a signal for driving the energy generation elements 19; an ejection port formation member 3 including an ejection ports 10 for ejecting the liquid, and an ejection port formation surface 17 in which the ejection ports 10 are formed, and provided with a rear surface of the ejection port formation surface 17 on a side of the substrate upper surface 18; and a sealing agent 13 covering a connection portion between the electric wire 12 and the terminal 11. The ejection port area 40 of the ejection port formation surface 17, in which at least the ejection ports 10 are formed, is a high water-repellent area 14. An end area 41 of the ejection port formation surface 17 located between the ejection port area 40 and the terminal 11 in a plan view of the substrate upper surface 18 is a low water-repellent area 23, and at least part of the end area 41 is covered with the sealing agent 13.SELECTED DRAWING: Figure 2
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Inventors:
ISHIWATA TOMOKI
IWANAGA SHUZO
OIKAWA MAKI
TOMIZAWA KEIJI
SATO TOMOATSU
HAMMURA AKIKO
MURAOKA CHIAKI
YOSHIKAWA SHINPEI
IWANAGA SHUZO
OIKAWA MAKI
TOMIZAWA KEIJI
SATO TOMOATSU
HAMMURA AKIKO
MURAOKA CHIAKI
YOSHIKAWA SHINPEI
Application Number:
JP2018165902A
Publication Date:
March 12, 2020
Filing Date:
September 05, 2018
Export Citation:
Assignee:
CANON KK
International Classes:
B41J2/14; B41J2/16
Domestic Patent References:
| JPH1044419A | 1998-02-17 | |||
| JP2006187948A | 2006-07-20 | |||
| JP2011121218A | 2011-06-23 |
Foreign References:
| US6151045A | 2000-11-21 |
Attorney, Agent or Firm:
Akio Miyazaki
Masaaki Ogata
Masaaki Ogata