Circuit routing for printhead having increased corrosion...

Details Circuit routing for printhead having increased corrosion... Circuit routing for printhead having increased corrosion...

2006-08-01

2006-08-01

Pham, Hai (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S057000, C347S058000

Reexamination Certificate

active

07083265

ABSTRACT:
The present invention includes as one embodiment a printhead having a circuit with plural resistors and a power bus. The printhead includes a metal stack formed within the circuit, which is comprised of a first metal layer and a second metal layer and at least one power via. The power via is formed within the circuit as an interface between the first metal layer and the second metal layer and acts as a corrosion separation barrier between of the resistors and the power bus.

REFERENCES:
patent: 5159353 (1992-10-01), Fasen et al.
patent: 5187500 (1993-02-01), Bohorquez et al.
patent: 6056391 (2000-05-01), Kasamoto et al.
patent: 6260952 (2001-07-01), Feinn et al.

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