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US 5,861,902 AGranted
Thermal tailoring for ink jet printheads
AssigneeHewlett-Packard Company
InventorTimothy E. Beerling
Life of this patent
Estimating the term…
Abstract
The present invention is a thermal printhead which includes a substrate portion, a resistive material configured to form a heating element and a thermal barrier island positioned between the resistive material and the substrate portion. The thermal barrier island is defined between the heating element and the substrate portion to reduce the heat flow between the heating element and the substrate portion.
Claims6
A method for forming an ink jet printhead for use in ink jet printing, the method comprising:
- defining a substrate portion;
- defining a thermal barrier island, the defining a thermal barrier island including:
- depositing a first planar layer on the substrate portion depositing a second planar layer on the first planar layer;
- and
- displacing at least a portion of the first planar layer beneath the second planar layer to define a free standing film, wherein the thermal barrier being defined by a cavity between the free standing film and the substrate ;
- and
- defining a resistive heating element for ejecting ink from the printhead, the thermal barrier island being disposed between the substrate portion and the resistive heating element.
4 more elements
Dependencies are inferred from the claim text.