Barrier structure for thermal ink-jet printheads

Details Barrier structure for thermal ink-jet printheads Barrier structure for thermal ink-jet printheads

B - Operations, Transporting

41

J

101/96.022

B41J 2/01 (2006.01) B41J 2/14 (2006.01) B41J 2/20 (2006.01)

Patent

CA 1300972

ABSTRACT OF THE DISCLOSURE A three-sided barrier structure (22), comprising three walls (24a-c), is provided in conjunction with a resistor (10) used in a thermal ink-jet printhead. Place- ment of the structure less than about 25 µm from the re- sistor results in longer resistor life and an improvement in the static bubble purging ability of the printhead. Two-slded barrier structures (14), comprising two walls (16a-b), associated with the resistor at spacings less than about 25 µm also improve the resistor life.

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