Inkjet printhead integrated circuit with ink spread prevention
First Claim
1. An inkjet printhead integrated circuit which comprisesa silicon wafer substrate that defines a plurality of ink inlet channels;
- an electrical drive circuitry layer positioned on the silicon wafer substrate for connection to a suitable microprocessor; and
a plurality of replicated nozzle arrangements positioned on the substrate to receive an enabling signal from the microprocessor, each nozzle arrangement having nozzle chamber wallsand a roof positioned on the nozzle chamber walls to define a nozzle chamber in fluid communication with a respective ink inlet channel with the roof defining an ink ejection port in fluid communication with the nozzle chamber and a recess about the ink ejection port to inhibit ink spread.
3 Assignments
0 Petitions
Accused Products
Abstract
An inkjet printhead integrated circuit includes a silicon wafer substrate that defines a plurality of ink inlet channels. An electrical drive circuitry layer is positioned on the silicon wafer substrate for connection to a suitable microprocessor. A plurality of replicated nozzle arrangements is positioned on the substrate to receive an enabling signal from the microprocessor. Each nozzle arrangement has nozzle chamber walls and a roof positioned on the nozzle chamber walls to define a nozzle chamber in fluid communication with a respective ink inlet channel with the roof defining an ink ejection port in fluid communication with the nozzle chamber and a recess about the ink ejection port to inhibit ink spread.
63 Citations
7 Claims
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1. An inkjet printhead integrated circuit which comprises
a silicon wafer substrate that defines a plurality of ink inlet channels; -
an electrical drive circuitry layer positioned on the silicon wafer substrate for connection to a suitable microprocessor; and a plurality of replicated nozzle arrangements positioned on the substrate to receive an enabling signal from the microprocessor, each nozzle arrangement having nozzle chamber walls and a roof positioned on the nozzle chamber walls to define a nozzle chamber in fluid communication with a respective ink inlet channel with the roof defining an ink ejection port in fluid communication with the nozzle chamber and a recess about the ink ejection port to inhibit ink spread. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification