Metal working – Method of mechanical manufacture – Fluid pattern dispersing device making – e.g. – ink jet
Reexamination Certificate
2008-01-29
2008-01-29
Tugbang, A. Dexter (Department: 3729)
Metal working
Method of mechanical manufacture
Fluid pattern dispersing device making, e.g., ink jet
C029S832000, C029S835000, C029S845000, C029S611000, C216S027000, C216S041000, C216S067000, C216S099000
Reexamination Certificate
active
07322104
ABSTRACT:
An ink jet head includes a substrate having a flow path construction member constructing a plurality of discharge ports for discharging ink and a plurality of ink flow paths corresponding thereto, and a plurality of energy generating elements corresponding to the plurality of discharge ports. The substrate has an ink supply port for supplying ink to the ink flow paths. The ink supply port includes a first liquid chamber disposed on a plane on which the energy generating elements are formed, and having a grooves with island-shaped columns left, and a second liquid chamber disposed on the opposed plane, and having a plurality of through holes partitioned at positions corresponding to the island-shaped columns. In the ink jet head, the island-shaped columns and a partition wall for the through holes are left as a beam construction section, thereby improving a mechanical strength of a semiconductor substrate. Also, the first liquid chamber has a groove with island-shaped columns left, thereby enabling ink to be adequately supplied from the ink supply port to the discharge ports.
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Fujii Kenji
Koyama Shuji
Nagata Shingo
Osumi Masaki
Yamamuro Jun
Canon Kabushiki Kaisha
Canon U.S.A. Inc I.P. Div
Nguyen Tai Van
Tugbang A. Dexter
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