Patent Number: 7,708,372

Title: Inkjet nozzle with ink feed channels etched from back of wafer

Abstract: An inkjet printhead with a wafer substrate and an array of ink ejection nozzles formed on the front side by lithographic etching and deposition techniques; and, a plurality elongate ink feed channels etched from the back side for supplying ink to the nozzles. Etching the ink feed channels from the back surface of the wafer removes the need for ink feed channels beside the chambers. This provides more room for the power and print data connections to each nozzle along the front surface of the wafer. Individual ink feed channels for each nozzle eliminates fluidic cross talk between adjacent nozzles. An ink feed channel that supplies several nozzles from the side of each chamber needs to incorporate special features such as pinch points to deal with fluidic cross talk. However, a back etched ink feed channel can supply several nozzles without fluidic cross talk.

Inventors: Silverbrook; Kia (Balmain, AU)

Assignee: Silverbrook Research Pty Ltd

International Classification: B41J 2/015 (20060101); B41J 2/04 (20060101)

Expiration Date: 5/04/12018