Piezoelectric print-head and method of manufacture
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United States of America Patent
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-
Jul 15, 2003
Grant Date -
Mar 6, 2003
app pub date -
Aug 9, 2002
filing date -
Sep 6, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A piezoelectric ink-jet printhead that uses a metallic layer and a thick film layer with a slot hole therein instead of a ceramic vibration plate and an ink layer. The piezoelectric layer and the upper electrode layer are formed inside the ink cavity so that overall thickness of the print head is reduced. To form the ink-jet print head, a metallic layer and a lower electrode layer are sequentially formed over a substrate. A patterned piezoelectric layer and an upper electrode layer are sequentially formed over the lower electrode layer. A patterned thick film layer with a slot hole therein is formed over the metallic layer. The thick film layer and the metallic layer together form a cavity that encloses the piezoelectric layer and the upper electrode layer. A nozzle plate having a nozzle thereon is attached to the thick film layer. The nozzle plate, the thick film layer and the metallic layer together form an ink cavity. The hole in the nozzle is continuous with the ink cavity.
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