Stacked heater elements in a thermal ink jet printhead
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United States of America Patent
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Dec 30, 2003
Grant Date -
N/A
app pub date -
Nov 23, 2002
filing date -
Nov 23, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
There is disclosed an ink jet printhead which comprises a plurality of nozzles and one or more heater elements corresponding to each nozzle. Each heater element is configured to heat a bubble forming liquid in the printhead to a temperature above its boiling point to form a gas bubble therein. The generation of the bubble causes the ejection of a drop of an ejectable liquid (such as ink) through the respective corresponding nozzle, to effect printing. The printhead has a plurality of nozzle chambers each corresponding to a respective nozzle, with a plurality of the heater elements being disposed within each chamber. The heater elements within each chamber are formed on different respective layers to one another.
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