| US 7,331,656 B2 | ||
| Ink jet recording head and method of manufacturing the same | ||
| Akinori Shinohara, Kanagawa (Japan); and Akemi Ishizaki, Kanagawa (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Mar. 13, 2006, as Appl. No. 11/373,171. | ||
| Claims priority of application No. 2005-086028 (JP), filed on Mar. 24, 2005. | ||
| Prior Publication US 2006/0214994 A1, Sep. 28, 2006 | ||
| Int. Cl. B41J 2/05 (2006.01) | ||
| U.S. Cl. 347—65 [347/40; 347/43; 347/47] | 4 Claims |
| 1. An ink jet recording head having:
a plurality of energy generating elements for generating energy for discharging ink;
a plurality of discharge ports provided at locations opposed to respective ones of said energy generating elements;
a plurality of ink flow paths communicating with respective ones of said discharge ports; and
an ink supplying port for supplying the ink to said plurality of ink flow paths;
wherein a first protruding portion having its surface formed of a material having a surface energy smaller than the interfacial
energy between it and an ink is provided upstream of said discharge ports with respect to an ink flow direction in which the
ink flows from said ink supplying port into said ink flow paths and is discharged from said discharge ports.
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