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US 8,025,367 B2Granted
Inkjet printhead with titanium aluminium alloy heater
AssigneeSilverbrook Research Pty Ltd
InventorsAngus John North, Jennifer Mia Fishburn, Lakshmi Channarayapatna
Life of this patent
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Abstract
An inkjet printhead with a resistive heaters for vaporizing ink to eject drops through respective nozzles. The heater is formed from a TiAlX alloy where Ti contributes more than 40% by weight, Al contributes more than 40% by weight and X contributes less than 5% by weight and comprises zero or more of Ag, Cr, Mo, Nb, Si, Ta and W.
Claims10
An inkjet printhead for ejecting drops of liquid on to a media substrate, the inkjet printhead comprising:
- a chamber for holding liquid;
- a nozzle in fluid communication with the chamber;
- a heater positioned in the chamber for thermal contact with the liquid such that resistive heating of the heater generates a vapour bubble that ejects a drop of the liquid through the nozzle;
- wherein,
- the heater is formed from a TiAlX alloy where Ti contributes more than 40% by weight, Al contributes more than 40% by weight and X contributes less than 5% by weight and comprises zero or more of Ag, Cr, Mo, Nb, Si, Ta and W,
- wherein the heater has a microstructure with a grain size less than 100 nanometers, and
- the heater further comprises a protective coating, the protective coating having a total thickness less than 0.5 microns.
4 more elements
Dependencies are inferred from the claim text.