Liquid ejection head having structural modifications to film layers and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-8991975-B2
Application number	US-201313951730-A
Country	US
Kind code	B2
Filing date	Jul 26, 2013
Priority date	Jul 31, 2012
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

A liquid ejection head includes a substrate having a supply port that is a through-hole for supplying liquid; an energy generating element for generating energy to be used for ejecting the liquid; a first film that covers the energy generating element; a second film formed on the first film; and a flow path forming member bonded to the substrate, for forming a flow path for supplying the liquid supplied from the supply port to an ejection orifice. When viewed from a direction perpendicular to the substrate, an end portion of the first film extends inwardly from an opening edge of the supply port, and an end portion of the second film is located between the opening edge of the supply port and the end portion of the first film.

First claim

What is claimed is:

1. A liquid ejection head comprising:
a substrate comprising:
a supply port that is a through-hole for supplying liquid;
an energy generating element for generating energy to be used for ejecting the liquid;
a first film that covers the energy generating element; and
a second film formed on the first film; and

a flow path forming member bonded to the substrate, for forming a flow path for supplying the liquid supplied from the supply port to an ejec…

Assignees

• Canon Kk

Inventors

• Takagi Yosuke
• Akama Yuichiro
• Fujii Kenji
• Chida Mitsuru

Classifications

• B41J2/1404 Primary

  Operations & Transport · mapped topic

• B41J2002/14403

  Operations & Transport · mapped topic

• B41J2/14 Primary

  Operations & Transport · mapped topic

• B41J2/1637

  Operations & Transport · mapped topic

• Y10T29/49401

  Cross-Sectional Technologies · mapped topic