Thermal inkjet printer printhead with offset heater resistors
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United States of America Patent
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Jun 3, 1997
Grant Date -
N/A
app pub date -
Apr 29, 1994
filing date -
Apr 29, 1994
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A printhead includes a substrate with an ink feed aperture extending from a first surface to a second surface and a plurality of heater resistors disposed on it. Primitive groupings of the resistors are coupled to associated group power sources. An ink barrier layer is deposited on the substrate to create ink firing chambers for each resistor. One wall of the ink barrier has a constricted opening through which ink is supplied from the ink feed aperture. A plurality of transistors are disposed in the substrate with each transistor output coupled to an associated one of the resistors and each input coupled to one of a plurality of addressing signal lines. The number of addressing signal lines is equal to the number of resistors in a primitive grouping.
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