Printhead chip having low aspect ratio ink supply channels

Details Printhead chip having low aspect ratio ink supply channels Printhead chip having low aspect ratio ink supply channels

2005-04-04

2008-05-06

Vo, Anh T. N. (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S065000

Reexamination Certificate

active

07367650

ABSTRACT:
A pagewidth inkjet printhead is provided. The printhead comprises (a) a plurality of nozzles formed on a frontside of a substrate, each nozzle having a respective nozzle inlet; and (b) a plurality of ink supply channels. Each ink supply channel is configured for supplying ink from a backside of the substrate to a corresponding group of nozzle inlets. Further, each ink supply channel has an aspect ratio of less than 4:1, the aspect ratio being defined by the ratio of the channel depth to the channel width. A low aspect ratio allows facile backside etching of the ink supply channels.

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