Thermal inkjet print head with solvent resistance
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United States of America Patent
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Feb 24, 2015
Grant Date -
May 1, 2014
app pub date -
Jan 7, 2014
filing date -
Jun 29, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
An inkjet printing system includes a print head in fluid communication with an ink reservoir and having a plurality of orifices and a corresponding plurality of associated ejection chambers. The print head includes a substrate and a barrier layer disposed on the substrate. The barrier layer defines in part a plurality of fluid channels and the plurality of ejection chambers. The barrier layer includes a material selected from epoxy-based photo resist materials and methyl methacrylate-based photo resist materials. An orifice plate is disposed over the substrate. The orifice plate includes the plurality of orifices in fluid communication with the ejection chambers. The system includes a reservoir containing an organic solvent-based ink composition, wherein the ink composition includes an organic solvent selected from C1-C4 alcohols, C3-C6 ketones, C3-C6 esters, C4-C8 ethers, and mixtures thereof, in an amount 60% or more by weight of the ink composition.
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