Heater of bubble-jet type ink-jet printhead for gray scale printing and manufacturing method thereof
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United States of America Patent
Stats
-
Oct 8, 2002
Grant Date -
Jan 24, 2002
app pub date -
Apr 26, 2001
filing date -
Jul 24, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A heater of a bubble-jet type ink jet printhead enabling gray scale and manufacturing method thereof are provided. The heater includes two or more heating elements arranged concentrically around a nozzle. Each of the heating elements is formed in polygonal or annular shape and spaced apart by a different distance from the center of the nozzle. Each heating element is coupled to an electrode for applying heater drive power independently. Thus, the heater drive power is applied to each electrode selectively or in combination, thereby forming bubbles having different volumes.
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