Actuator chip for inkjet printhead with electrostatic...

Details Actuator chip for inkjet printhead with electrostatic... Actuator chip for inkjet printhead with electrostatic...

2008-04-22

2008-04-22

Jackson, Jerome (Department: 2815)

Active solid-state devices (e.g., transistors, solid-state diode

Integrated circuit structure with electrically isolated...

C438S023000, C438S040000, C438S048000

Reexamination Certificate

active

11352794

ABSTRACT:
An inkjet printhead chip includes electrostatic discharge (ESD) circuits to protect the chip during ESD events, including one preventing a thin dielectric layer on a substrate from breakdown. In one embodiment, the chip includes an ESD circuit essentially dedicated per each actuator. In another, ESD circuits alternate connection between power and ground. In still another, actuators are approximately equidistantly spaced regarding respective ESD circuits. Exemplary ESD circuits include a ballast resistor in series with a diode. In turn, diodes are either forward biased toward power or away from ground. In a thermal inkjet embodiment, a cavitation layer above a resistor and dielectric layer have pluralities of fingers connecting the cavitation layer to a metal buss. The metal buss attaches to the ballast resistors. Protection typically embodies the safe distribution of ESD current to ground during both chip manufacture and user printhead installation. Inkjet printheads and printers are also disclosed.

REFERENCES:
patent: 3524408 (1970-08-01), Pierson
patent: 5147141 (1992-09-01), Sakaida et al.
patent: 5315472 (1994-05-01), Fong et al.
patent: 5359211 (1994-10-01), Croft
patent: 5371395 (1994-12-01), Hawkins
patent: 5428498 (1995-06-01), Hawkins et al.
patent: 5465189 (1995-11-01), Polgreen et al.
patent: 5532901 (1996-07-01), Hawkins et al.
patent: 5610790 (1997-03-01), Staab et al.
patent: 5710689 (1998-01-01), Becerra et al.
patent: 5719739 (1998-02-01), Horiguchi
patent: 5744841 (1998-04-01), Gilbert et al.
patent: 5892524 (1999-04-01), Silverbrook
patent: 5960290 (1999-09-01), Hsu
patent: 5988796 (1999-11-01), Yamanaka
patent: 6248639 (2001-06-01), Ravanelli
patent: 6278585 (2001-08-01), Olson et al.
patent: 6361150 (2002-03-01), Schulte et al.
patent: 6454955 (2002-09-01), Beerling et al.
patent: 6493198 (2002-12-01), Arledge et al.
patent: 6567251 (2003-05-01), Schulte et al.
patent: 6576959 (2003-06-01), Kunz et al.
patent: 6692111 (2004-02-01), Beerling et al.
patent: 6764892 (2004-07-01), Kunz et al.
patent: 2004/0079744 (2004-04-01), Bodeau et al.
patent: 2004/0100746 (2004-05-01), Chen et al.
patent: 2004/0183866 (2004-09-01), Conta et al.
patent: 2004/0207693 (2004-10-01), Sturgeon et al.
patent: 2004/0212936 (2004-10-01), Salling et al.
patent: 2005/0012791 (2005-01-01), Anderson et al.
patent: 0 590 859 (1994-04-01), None
patent: 04-247947 (1992-09-01), None
patent: 08-039801 (1996-02-01), None
patent: 08-132616 (1996-05-01), None
patent: 2003-072076 (2003-03-01), None
patent: 2004-050636 (2004-02-01), None
W.G. Hawkins et al., “Silicon based 40-V thermal ink jet IC” Microelectronic Engineering, vol. 19 (1992) pp. 165-168.
S. Gibilisco, The Illustrated Dictionary of Electronics—8th edition, New York: McGraw-Hill, 2001, p. 60.

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