Ink jet printhead and method of making
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United States of America Patent
Stats
-
Aug 4, 1998
Grant Date -
N/A
app pub date -
Mar 27, 1996
filing date -
Mar 27, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ink jet printhead includes a nonconductive substrate into which a plurality of tapered nozzle holes are formed with the wide hole area coincident with an ink entry side and with the marrow hole area coincident with an ink exit side, and with an ink reservoir mounted on the ink entry side. A metal layer covers the interior of each nozzle hole, and also provides an electrical control-signal conductor on the ink entry side for each metallized nozzle hole. The metal layer also provides a tubular metal extension for each metallized nozzle, these extensions extending a common distance beyond the ink exit side. A plurality of metal conductors may be provided on the ink exit side to facilitate nozzle control using signal-multiplexing techniques, or a field compensation electrode may be provided on the ink exit side.
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