Integrated thin-film drive head for thermal ink-jet printer
First Claim
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1. A drive head for a thermal ink-jet printhead device comprising:
- a transistor;
a heat transducer; and
a multi-functional layer having a first portion that functions as a channel of the transistor and having a second portion that functions as a portion of the heat transducer.
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Abstract
A thin-film ink-jet drive head provides a MOSTFT (metal oxide semiconductor thin-film transistor) transistor, a resistor and the interconnect between the two electrical components, all comprised of the same, multi-functional thin-film layer. Differing portions of the multi-functional thin-film layer function as (1) heating resistors to propel ink droplets from the printhead (2) ink MOSTFT transistors to selectively drive (fire) the resistors, and (3) direct conductive pathways between the drive transistors and the resistors.
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Citations
19 Claims
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1. A drive head for a thermal ink-jet printhead device comprising:
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a transistor;
a heat transducer; and
a multi-functional layer having a first portion that functions as a channel of the transistor and having a second portion that functions as a portion of the heat transducer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A drive head for a thermal ink-jet printhead device comprising:
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a substrate;
a transistor attached to the substrate;
a resistor attached to the substrate; and
an uninterrupted layer of conductive material inter-connected between and forming at least a part of the transistor and the resistor and wherein preselected portions of the uninterrupted layer of conductive material are doped at different levels such that a first portion of the layer functions as a channel of the transistor and a second portion functions as part of the resistor. - View Dependent Claims (13, 14, 15)
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16. A method for fabricating a drive head for a thermal ink-jet printhead device comprising the steps of:
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providing a substrate;
attaching to the substrate a transistor and a resistor; and
inter-connecting the transistor with an uninterrupted layer of conductive material so that a first portion of the layer functions as a channel of the transistor and a second portion of the layer functions as the resistor. - View Dependent Claims (17, 18, 19)
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Specification