Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
Ink jet recording head including a cap member sealing piezoelectric vibrators
 An ink jet recording head comprises: a passage form substrate having, a diaphragm forming a part of a pressure generating chamber communicating with a nozzle aperture and at least the upper surface of which acts as a lower electrode, and a piezoelectric vibrator including a piezoelectric material layer formed on the surface of the diaphragm, an upper electrode formed on the surface of the piezoelectric material layer and a piezoelectric active part formed in an area opposite to the pressure generating chamber; a cap member joined to the side of the piezoelectric material layer of the passage formed substrate for sealing space in a state in which space to extent that a movement is not prevented is secured; and a flexible portion for absorbing the change of pressure in the space of the cap member. 
Seiko Epson Corporation
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B41J B41J B41J B41J
additional additional inventional additional
Shiro Tsutomu Shinri
Yazaki Nishiwaki Sakai