Patent ID: 6749762
Filing Date: 2004-06-15
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 a heater having an annular shape on the nozzle plate; forming a manifold for supplying ink from the bottom side of the substrate toward the surface of the substrate; forming an electrode 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 an ink chamber having a diameter greater than that of the annular heater, wherein the ink chamber has a substantially hemispherical shape, and wherein forming the ink chamber includes: anisotropically etching the substrate exposed by the nozzle to a predetermined depth and forming a hole; depositing predetermined material layer over the anisotropically etched substrate to a predetermined thickness; anisotropically etching the material layer to expose the bottom of the hole while forming a spacer of the material layer along a sidewall of the hole; and isotropically etching the substrate exposed to the bottom of the hole; and forming an ink channel linking the ink chamber and the manifold at the bottom of the ink chamber.