Piezoelectric ink jet print head and fabrication method for...

Metal working – Piezoelectric device making

Reexamination Certificate

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C029S890100, C216S027000, C347S068000

Reexamination Certificate

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06981300

ABSTRACT:
A piezoelectric ink jet print head and a fabrication method for a pressure chamber thereof. A silicon substrate has at least one large-size opening. A photoresist layer is formed in the large-size opening of the silicon substrate and has a plurality of small-size trenches spaced apart from each other. Each of the small-size trenches serves as a pressure chamber. An adhesion layer is formed overlying the silicon substrate to cover the photoresist layer and the small-size trenches. A silicon layer is formed overlying the adhesion layer to serve as a vibrating layer.

REFERENCES:
patent: 5581861 (1996-12-01), Lee et al.
patent: 6096656 (2000-08-01), Matzke et al.
patent: 6334670 (2002-01-01), Yoshihira et al.
patent: 6701593 (2004-03-01), Lin et al.

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