Patents by Inventor Bernard Rojas

Bernard Rojas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of forming openings in substrates and inkjet printheads fabricated thereby
    Patent number: 8043517
    Abstract: A method of forming an opening through a substrate includes defining an area on a first surface of the substrate where the opening is to be formed, the area having a center region flanked by edge regions. A top layer having a substantially closed space located over the area is formed on the first surface. Structure for promoting etching of the center region is provided, and the first surface of the substrate is etched in the area. In one embodiment, the method can fabricate an inkjet printhead having a substrate having an ink feed hole formed therethrough and an orifice plate formed thereon. A plurality of particle tolerance elements located over a center region of the ink feed hole promoted etching during the fabrication of the printhead.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: October 25, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jianhui Gu, Rio Rivas, Jeremy Harlan Donaldson, Bernard A Rojas
  • Method of forming openings in substrates and inkjet printheads fabricated thereby
    Publication number: 20070064060
    Abstract: A method of forming an opening through a substrate includes defining an area on a first surface of the substrate where the opening is to be formed, the area having a center region flanked by edge regions. A top layer having a substantially closed space located over the area is formed on the first surface. Structure for promoting etching of the center region is provided, and the first surface of the substrate is etched in the area. In one embodiment, the method can fabricate an inkjet printhead having a substrate having an ink feed hole formed therethrough and an orifice plate formed thereon. A plurality of particle tolerance elements located over a center region of the ink feed hole promoted etching during the fabrication of the printhead.
    Type: Application
    Filed: September 19, 2005
    Publication date: March 22, 2007
    Inventors: Jianhui Gu, Rio Rivas, Jeremy Donaldson, Bernard Rojas