Low energy, long life micro-fluid ejection device

Details Low energy, long life micro-fluid ejection device Low energy, long life micro-fluid ejection device

2005-12-23

2008-08-19

Stephens, Juanita D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S056000, C347S064000

Reexamination Certificate

active

07413289

ABSTRACT:
Micro-fluid ejection heads and methods for extending the life of micro-fluid ejection heads. One such micro-fluid ejection head includes a substrate having a plurality of thermal ejection actuators. Each of the thermal ejection actuators has a resistive layer and a protective layer thereon. A flow feature member is adjacent the substrate and defines a fluid feed channel, a fluid chamber associated with at least one of the actuators and in flow communication with the fluid feed channel, and a nozzle. The nozzle is offset to a side of the chamber opposite the feed channel. A polymeric layer having a degradation temperature of less than about 400° C. overlaps a portion of the at least one actuator associated with the fluid chamber and positioned less than about five microns from at least an edge of the at least one actuator opposite the fluid feed channel.

REFERENCES:
patent: 4794411 (1988-12-01), Taub et al.
patent: 5831648 (1998-11-01), Mitani et al.
patent: 6161924 (2000-12-01), Mitani et al.
patent: 7070262 (2006-07-01), Yamamoto et al.
patent: 2005/0012791 (2005-01-01), Anderson et al.

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