Patent ID: 6260960
Filing Date: 2001-07-17
Classification: B41J

Abstract:
An ink jet print head comprising:a single-crystal silicon substrate having a first surface and a second surface opposite to said first surface;a piezoelectric element disposed on said first surface of said single-crystal silicon substrate;an ink cavity disposed in a region of said single-crystal silicon substrate, said region corresponding in position to said piezoelectric element; anda nozzle member disposed on said second surface of said single-crystal silicon substrate, said nozzle member having at least an orifice communicating with said ink cavity,wherein said ink cavity includes a first portion ranging from said second surface to a surface-region position near said first surface, said first portion being formed through anisotropical wet etching, and a second portion ranging from said surface-region position to said first surface, said second portion being formed through anisotropical dry etching; andin which a side wall of said ink cavity ranging from said surface-region position to said first surface is tapered toward an outer side of said ink cavity.