Patent ID: 6641745
Filing Date: 2003-11-04
Classification: B41J

Abstract:
A method of forming a manifold through a substrate of a printhead substructure, the substructure having an ink reservoir-facing side and an opposing transducer-supporting side, the method comprising:Introducing an etchant that comes into contact with the transducer-supporting side of the substrate; Irradiating the etchant contacting side of the substrate using a laser beam so that irradiated areas are etched to define a first portion of the manifold therein; and Forming a second portion of the manifold through the substrate to connect with the first portion, wherein the irradiated areas are etched to form a groove along a perimeter of a pre-determined opening of the manifold on the transducer-supporting side to leave a substrate island that is surrounded by the groove and wherein forming the second portion of the manifold includes sand blasting through the substrate from the ink reservoir side to remove substrate island.