Patent ID: 6685846
Filing Date: 2004-02-03
Classification: B41J

Abstract:
A method of manufacturing a bubble-jet type ink-jet printhead, the method comprising the steps of:forming a nozzle plate on a surface of a substrate; forming an annular heater on the nozzle plate; etching the substrate and forming a manifold for supplying ink; forming electrodes electrically connected to the annular heater on the nozzle plate; etching the nozzle plate and forming a nozzle having a diameter less than an inner diameter of the annular heater; etching the substrate exposed by the nozzle and forming a substantially hemispherical ink chamber having a diameter greater than that of the annular heater, wherein forming the ink chamber includes: anisotropically etching the substrate exposed by the nozzle to a predetermined depth to form a trench; depositing a predetermined material layer over the anisotropically etched substrate to a predetermined thickness; anisotropically and partially etching the material layer to expose the bottom of the trench and forming a spacer of the material layer along the sidewalls of the trench; and isotropically etching the substrate exposed to the bottom of the trench; and etching the substrate between the manifold and the ink chamber from the surface and forming an ink channel for connecting the ink chamber with the manifold.