Ink-jet head substrate, ink-jet head and ink-jet recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTeruo Ozaki, Masami Kasamoto, Shuji Koyama, Junichiro Iri
Life of this patent
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Abstract
To provide an ink-jet head substrate enabling both highly koge. characteristic ink and corrosive ink to be used, an ink-jet head using the same basis and an ink-jet recording apparatus equipped with the same head. The ink-jet head substrate includes: heat generating resistors forming heat generating sections on a base; electrode wires electrically connected to the heat generating resistors; and anti-cavitation films installed via an insulator protective layer on the heat generating resistors and the electrode wires, in which the anti-cavitation film is formed of materials varying with individual given areas on the base.
Claims12
An ink-jet head comprising:
- an ink-jet head substrate provided with a plurality of heat generating resistors forming a heat generating section on a base, a plurality of electrode wires electrically connected to said plurality of heat generating resistors, and an insulator protective layer for covering said heat generating resistors and said electrode wires;
- a first liquid path communicating with a discharge port for discharging a first ink droplet of a first ink and provided corresponding to the heat generating section;
- and
- a second liquid path communicating with a discharge port for discharging a second ink droplet of a second ink different from the first ink and provided correspondingly to the heat generating section,
- wherein a plurality of anti-cavitation films are provided at an area corresponding to said heat generating section on said insulator protective layer, and
- wherein an anti-cavitation film provided for said first liquid path and an anti-cavitation film provided for said second liquid path are formed from different materials.
An ink-jet head comprising:
- an ink-jet head substrate provided with a plurality of heat generating resistors forming a heat generating section on a base, a plurality of electrode wires electrically connected to said plurality of heat generating resistors, and an insulator protective layer for covering said heat generating resistors and said electrode wires;
- a first liquid path communicating with a discharge port for discharging a first ink droplet of a first ink and provided correspondingly to the heat generating section;
- and
- a second liquid path communicating with a discharge port for discharging a second ink of a second ink droplet different from the first ink and provided correspondingly to the heat generating section,
- wherein a plurality of anti-cavitation films are provided at an area corresponding to said heat generating section on said insulator protective layer, and
- wherein an anti-cavitation film provided for said first liquid path is different in ink corrosion resistance from an anti-cavitation film provided for said second liquid path.
An ink-jet head, said ink-jet head being supplied with a first ink containing either a divalent metal or a chelate-complex forming component, and a second ink different from said first ink, and containing neither a divalent metallic salt nor a chelate-complex forming component, comprising:
- a plurality of discharge ports provided individually for each type of said first or second ink for discharging droplets;
- a plurality of ink flow paths communicating with said plurality of discharge ports;
- a plurality of heat generating resistors forming the heat generating sections disposed in said ink flow paths;
- a plurality of electrode wires electrically connected to said heat generating resistors;
- and
- a plurality of anti-cavitation films for coating said heat generating resistors and said electrode wires on an insulating protective layer,
- wherein said plurality of anti-cavitation films have different ink corrosion properties, at least one of said plurality of anti-cavitation films covering heat generating resistors for discharging said first ink, said first ink containing either a divalent metal or a chelate-complex forming component, and at least one of said plurality of anti-cavitation films covering said heat generating resistors for discharging said second ink, said second ink containing neither a divalent metal nor a chelate-complex forming component, and
- wherein an anti-cavitation film provided for a first one of said ink flow paths and an anti-cavitation film provided for a second one of said ink flow paths are formed from different materials.
An ink-jet head, said ink-jet head being supplied with a first ink containing either a divalent metal or a chelate-complex forming component, and a second ink different from said first ink, and containing neither a divalent metallic salt nor a chelate-complex forming component, comprising:
- a plurality of discharge ports provided individually for each type of said first or second ink for discharging droplets;
- a plurality of ink flow paths communicating with said plurality of discharge ports;
- a plurality of heat generating resistors forming the heat generating sections disposed in said ink flow paths;
- a plurality of electrode wires electrically connected to said heat generating resistors;
- and
- a plurality of anti-cavitation films for coating said heat generating resistors and said electrode wires on an insulating protective layer,
- wherein said plurality of anti-cavitation films have different ink corrosion properties, at least one of said plurality of anti-cavitation films covering heat generating resistors for discharging said first ink, said first ink containing either a divalent metal or a chelate-complex forming component, and at least one of said plurality of anti-cavitation films covering said heat generating resistors for discharging said second ink, said second ink containing neither a divalent metal nor a chelate-complex forming component, and
- wherein an anti-cavitation film provided for a first one of said ink flow paths is different in ink corrosion resistance from an anti-cavitation film provided for a second one of said liquid flow paths.
Dependencies are inferred from the claim text.