Liquid ejection head

Details Liquid ejection head Liquid ejection head

2011-07-19

2011-07-19

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S023000, C347S061000, C347S063000, C347S064000

Reexamination Certificate

active

07980656

ABSTRACT:
On a liquid ejection head substrate, an upper protective layer, as well as coming into contact with a resin layer of a path forming member having an ejection opening, comes into contact with ink in a heat generating portion inside the channel formed. The upper protective layer contains iridium and silicon. The upper protective layer is configured so that, at a surface in contact with the ink and resin layer, Ir100-XSiXattains a 15 at. %≦X≦30 at. % silicon content rate, and that X approaches zero as a position in the upper protective layer approaches an adhesion layer. As a result, at the interface where the upper protective layer comes into contact with the path forming member, by the silicon attaining the heretofore described content rate, it is possible to improve the adhesion with the path forming member made of resin compared with a case of using iridium alone.

REFERENCES:
patent: 4723129 (1988-02-01), Endo et al.
patent: 4740796 (1988-04-01), Endo et al.
patent: 6485132 (2002-11-01), Hiroki et al.
patent: 7306327 (2007-12-01), Sakai et al.
patent: 2007/0120902 (2007-05-01), Ozaki et al.
patent: 2007/0146428 (2007-06-01), Sakai et al.
patent: 2009/0315956 (2009-12-01), Ishida et al.
patent: 2008-105364 (2008-05-01), None
patent: KR-2007-0061440 (2007-06-01), None

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