Inkjet printhead integrated circuit with rows of inkjet nozzles
First Claim
1. An inkjet printhead integrated circuit that comprisesa substrate that defines a plurality of ink passages;
- an array of control and drive circuits positioned on the substrate, each control and drive circuit having a drive transistor that includes a series of parallel traces;
an array of inkjet nozzles arranged on the substrate, each inkjet nozzle including a nozzle chamber structure that defines a nozzle chamber in fluid communication with a respective ink passage and an ink ejection port in fluid communication with the nozzle chamber; and
a plurality of elongate actuators, each actuator anchored to the substrate at a fixed end and overlying and spaced from, an associated control and drive circuit, and including a heater element for differential thermal expansion and contraction and thus displacement of the actuator, the array being configured to define a plurality of sets of inkjet nozzles, with each set comprising a pair of rows of inkjet nozzles, each nozzle chamber structure of one row being adjacent a nozzle chamber structure of another row, such that, in each set, the nozzle chamber structures are interposed between rows of actuators.
3 Assignments
0 Petitions
Accused Products
Abstract
An inkjet printhead integrated circuit includes a substrate that defines a plurality of ink passages. An array of control and drive circuits is positioned on the substrate, each control and drive circuit having a drive transistor that includes a series of parallel traces. An array of inkjet nozzles is arranged on the substrate, each inkjet nozzle including a nozzle chamber structure that defines a nozzle chamber in fluid communication with a respective ink passage and an ink ejection port in fluid communication with the nozzle chamber. Each of a plurality of elongate actuators is anchored to the substrate at a fixed end and overlies and is spaced from, an associated control and drive circuit. Each actuator includes a heater element for differential thermal expansion and contraction and thus displacement of the actuator. Each heater element has a series of corrugations corresponding with respective traces of the drive transistor. A plurality of ink displacement members is received in respective nozzle chambers. Each ink displacement member is movable to eject ink from the ink ejection ports. The ink displacement members are connected to respective actuators at opposite free ends.
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Citations
7 Claims
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1. An inkjet printhead integrated circuit that comprises
a substrate that defines a plurality of ink passages; -
an array of control and drive circuits positioned on the substrate, each control and drive circuit having a drive transistor that includes a series of parallel traces; an array of inkjet nozzles arranged on the substrate, each inkjet nozzle including a nozzle chamber structure that defines a nozzle chamber in fluid communication with a respective ink passage and an ink ejection port in fluid communication with the nozzle chamber; and a plurality of elongate actuators, each actuator anchored to the substrate at a fixed end and overlying and spaced from, an associated control and drive circuit, and including a heater element for differential thermal expansion and contraction and thus displacement of the actuator, the array being configured to define a plurality of sets of inkjet nozzles, with each set comprising a pair of rows of inkjet nozzles, each nozzle chamber structure of one row being adjacent a nozzle chamber structure of another row, such that, in each set, the nozzle chamber structures are interposed between rows of actuators. - View Dependent Claims (2, 4, 5, 6, 7)
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3. An inkjet printhead as claimed in clam 1, in which each inkjet nozzle includes an ink displacement member received in a respective nozzle chamber and movable to eject ink from the ink ejection ports, the ink displacement member being connected to a respective actuator at a free end of the actuator.
Specification