Patent ID: 6692114
Filing Date: 2004-02-17
Classification: B41J,Y10T

Abstract:
An ink jet recording head comprising:a passage forming substrate made of a silicon monocrystalline substrate including a pressure generating chamber communicating with a nozzle orifice; a vibration plate provided on a surface of the passage forming substrate; a piezoelectric element provided on the vibration plate having a lower electrode film, a piezoelectric layer and an upper electrode; a wide portion provided in the pressure generating chamber on a side of the vibration plate, extending in a longitudinal direction of the pressure generating chamber, a groove formed on a side of the wide portion, extending in a longitudinal direction of the wide portion; and an etching stop layer provided in the groove, defining a side wall of the wide portion as viewed in the width direction thereof to restrict the spread of the etching in the width direction.