×

Printhead with drive transistors and corresponding ink ejection actuators

  • US 7,210,764 B2
  • Filed: 10/02/2006
  • Issued: 05/01/2007
  • Est. Priority Date: 10/16/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A printhead for ejecting ink, the printhead comprising:

  • a substrate defining a plurality of ink supply channels;

    a plurality of nozzles operatively mounted to the substrate and defining respective ink chambers in fluid communication with respective ink supply channels and apertures through which ink can be ejected;

    a plurality of elongate actuators each comprising a thermally actuated arm with one end fixed to the substrate and a free end extending into a respective ink chamber and configured to move to eject ink from the corresponding aperture, each thermally actuated arm having a heater element; and

    a drive circuitry layer positioned on the substrate, the drive circuitry layer including a plurality of drive transistors connected to the heater elements of corresponding respective actuators, the drive transistors being interposed between their associated actuators and the substrate.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×