| US 7,611,232 B2 | ||
| Multi-nozzle ink jet head | ||
| Shuji Koike, Setagaya (Japan); Yoshiaki Sakamoto, Kawasaki (Japan); and Tomohisa Shingai, Kawasaki (Japan) | ||
| Assigned to Fuji Photo Film Co., Ltd., Minami-Ashigara-shi (Japan) | ||
| Filed on Dec. 21, 2006, as Appl. No. 11/642,739. | ||
| Application 11/642739 is a division of application No. 11/097138, filed on Apr. 04, 2005, granted, now 7,168,793. | ||
| Application 11/097138 is a division of application No. 10/807175, filed on Mar. 24, 2004, granted, now 6,902,263. | ||
| Application 10/807175 is a division of application No. 10/254782, filed on Sep. 26, 2002, abandoned. | ||
| Application 10/254782 is a continuation of application No. PCT/JP00/02137, filed on Mar. 31, 2000. | ||
| Prior Publication US 2007/0103518 A1, May 10, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B41J 2/45 (2006.01) | ||
| U.S. Cl. 347—71 | 2 Claims |
| 1. A multi-nozzle ink jet head which is manufactured by a thin film formation technique and has a plurality of nozzles, the
multi-nozzle ink jet head comprising:
a head substrate in which the plurality of nozzles and a plurality of pressure chambers are formed;
a diaphragm that comprises a common electrode layer and a rigid layer and covers each of the plurality of pressure chambers;
a plurality of piezoelectric elements provided on the diaphragm in correspondence with the pressure chambers; and
a plurality of individual electrodes provided on the piezoelectric elements in correspondence with the piezoelectric elements,
wherein the common electrode layer has a thickness so as to have a resistance value such that a lag in a rise time of a driving
waveform when driving all of the piezoelectric elements relative to a rise time of a driving waveform when driving a single
one of the piezoelectric elements, is not greater than 50 ns.
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