Inkjet printhead having thermally durable MEM inkjet array
AssigneeSilverbrook Research Pty Ltd
InventorKia Silverbrook
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Abstract
An inkjet printhead is provided comprising an array of microelectromechanical ink ejection devices formed on a wafer substrate. Each ink ejection device comprises an ink chamber defined by walls projecting from the wafer substrate to support a roof having an ink ejection port defined therein, and an electrically activated arm projecting from the wafer substrate into the ink chamber with one or more heat sinks formed thereon. Activation of the arm causes it to be displaced relative to the wafer substrate thereby causing ejection of ink from the ink chamber through the ink ejection port.
Claims10
An inkjet printhead comprising an array of microelectromechanical ink ejection devices formed on a wafer substrate, each ink ejection device comprising:
- an ink chamber defined by walls projecting from the wafer substrate to support a roof, the roof having an ink ejection port defined therein;
- and
- an electrically activated arm projecting from the wafer substrate into the ink chamber, at least one heat sink being formed on the arm, activation of the arm causing it to be displaced relative to the wafer substrate thereby causing ejection of ink from the ink chamber through the ink ejection port.
Dependencies are inferred from the claim text.