Patent ID: 8585181

Claim:
An inkjet head to eject ink in ink chambers from ink ejection ports by driving piezoelectric elements, comprising: a first silicon substrate in which a plurality of the ink ejection ports are formed to penetrate; a glass substrate bonded with one surface of the first silicon substrate, wherein a plurality of ink flow holes respectively corresponding to the ink ejection ports are formed to penetrate the glass substrate; and a second silicon substrate, wherein a plurality of the ink chambers respectively corresponding to ink flow paths are formed on an ink chamber forming surface of the second silicon substrate by grooving, wherein the piezoelectric elements, which change an inner volume of the ink chambers, are disposed respectively on back sides of the ink chambers, and wherein the ink chamber forming surface is bonded with the glass substrate so as to face an opposite surface of the glass substrate from the first silicon substrate; and an ink supply pathway from an ink supply tube to an ink flow out tube via an ink flow channel, wherein through holes are formed at both ends of the ink flow channel, and ink flow tubes are connected with the through holes, wherein the ink flow tube connected with one of the through holes serves as the ink supply tube, and wherein the ink flow tube connected with the other of the through holes serves as the ink flow out tube, wherein: the ink flow channel communicates with each ink chamber and is formed on the ink chamber forming surface, the through holes communicating with the ink flow channel are formed in the second silicon substrate, the ink flow tubes connected with the through holes are glass ink flow tubes, and bonding surfaces of the first silicon substrate, the glass substrate, the second silicon substrate, and the ink flow tubes are bonded by anodic-bonding.