Patent Number: 6,332,672

Title: Ink jet recording head including a cap member sealing piezoelectricvibrators

Abstract: An ink jet recording head comprises: a passage form substrate having, adiaphragm forming a part of a pressure generating chamber communicatingwith a nozzle aperture and at least the upper surface of which acts as alower electrode, and a piezoelectric vibrator including a piezoelectricmaterial layer formed on the surface of the diaphragm, an upper electrodeformed on the surface of the piezoelectric material layer and apiezoelectric active part formed in an area opposite to the pressuregenerating chamber; a cap member joined to the side of the piezoelectricmaterial layer of the passage formed substrate for sealing space in astate in which space to extent that a movement is not prevented issecured; and a flexible portion for absorbing the change of pressure inthe space of the cap member.

Inventors: Yazaki; Shiro (Nagano, JP), Sakai; Shinri (Nagano, JP), Nishiwaki; Tsutomu (Nagano, JP)

Assignee:

International Classification: B41J 2/14 (20060101); B41J 002/045 ()

Expiration Date: 12/25/2014