Inkjet printhead heater with high surface area

Details Inkjet printhead heater with high surface area Inkjet printhead heater with high surface area

2006-08-08

2006-08-08

Stephens, Juanita D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S062000

Reexamination Certificate

active

07086719

ABSTRACT:
There is disclosed an ink jet printhead which comprises a plurality of nozzles and one or more heater elements corresponding to each nozzle. Each heater element is configured to heat a bubble forming liquid in the printhead to a temperature above its boiling point to form a gas bubble therein. The generation of the bubble causes the ejection of a drop of an ejectable liquid (such as ink) through respective corresponding nozzle, to effect printing. Each heater element has a surface area to volume ratio greater than 4:1. This configuration ensures that heat is quickly transferred from the elements to the ink for efficient operation and minimal heating of the printhead substrate.

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The Fabrication and Reliability Testing of Ti/TiN Heaters, P DeMoor, Proceedings of SPIE, Micromachining and Microfabrication Process Technology V, vol. 3874, pp. 284-293. Please note, this document was provided in copending U.S. Appl. No. 10/303,348.

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