Patents by Inventor Michael William Chaw

Michael William Chaw 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).

  • Patent number: 7125467
    Abstract: A process for fabricating sliders where the sliders are held in place during processing by a solid matrix material is described. A thin coating of a release-layer material is applied on the sliders before encapsulation in the matrix material. The release-layer material is polyvinyl alcohol and more preferably high molecular weight polyvinyl alcohol which is highly hydrolyzed. Use of the release-layer of the invention maintains the process resistance while providing the advantage of allowing easier removal of the matrix material after it is no longer needed. The release-layer can be applied to encapsulant materials including epoxies, acrylates, polyimides, silsesquioxanes and others. After the selected fabrication process such as the formation of air-bearing features an appropriate solvent is applied to soften the polyvinyl alcohol film and allow clean debonding of the sliders.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: October 24, 2006
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Phillip Joe Brock, Michael William Chaw, Dan J. Dawson, Craig J. Hawker, James L. Hedrick, Wesley L. Hillman, Teddie P. Magbitang, Dennis R. McKean, Robert D. Miller, Richard I. Palmisano, Jila Tabib, Mark C. Thurber, Willi Volksen
  • Patent number: 6926582
    Abstract: A system and method for burnishing the edges and corners of hard disk drive sliders uses a combination of flexible tape fixturing and mechanical protrusions located beneath the tape to systematically orient selected slider corners and edges to be exposed to an abrasive in a flexible manner. This solution carefully exposes the sliders even when there is very little clearance between the sliders. A variety of different rounding geometries are achieved by customizing the protrusions underneath the flexible tape. Multiple slider corners and/or edges are exposed to the abrasive at one time for bulk processing. The sliders are oriented in such a way that sensitive structures located on the air bearing surfaces of the sliders are not harmed during burnishing.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: August 9, 2005
    Assignee: Hitachi Global Storage Technologies Nethrlands B.V.
    Inventors: Karl Frank Beckle, Michael William Chaw, Richard H. Koch, Mark Clinton Thurber, Bruno Alejandro Valdes
  • Publication number: 20040266186
    Abstract: A process for fabricating sliders where the sliders are held in place during processing by a solid matrix material is described. A thin coating of a release-layer material is applied on the sliders before encapsulation in the matrix material. The release-layer material is polyvinyl alcohol and more preferably high molecular weight polyvinyl alcohol which is highly hydrolyzed. Use of the release-layer of the invention maintains the process resistance while providing the advantage of allowing easier removal of the matrix material after it is no longer needed. The release-layer can be applied to encapsulant materials including epoxies, acrylates, polyimides, silsesquioxanes and others. After the selected fabrication process such as the formation of air-bearing features an appropriate solvent is applied to soften the polyvinyl alcohol film and allow clean debonding of the sliders.
    Type: Application
    Filed: June 30, 2003
    Publication date: December 30, 2004
    Inventors: Phillip Joe Brock, Michael William Chaw, Dan J. Dawson, Craig J. Hawker, James L. Hedrick, Wesley L. Hillman, Teddie P. Magbitang, Dennis R. McKean Milpitas, Robert D. Miller, Richard I. Palmisano, Julia Tabib, Mark C. Thurber, Willi Volksen
  • Publication number: 20030192167
    Abstract: A system and method for burnishing the edges and corners of hard disk drive sliders uses a combination of flexible tape fixturing and mechanical protrusions located beneath the tape to systematically orient selected slider corners and edges to be exposed to an abrasive in a flexible manner. This solution carefully exposes the sliders even when there is very little clearance between the sliders. A variety of different rounding geometries are achieved by customizing the protrusions underneath the flexible tape. Multiple slider corners and/or edges are exposed to the abrasive at one time for bulk processing. The sliders are oriented in such a way that sensitive structures located on the air bearing surfaces of the sliders are not harmed during burnishing.
    Type: Application
    Filed: April 16, 2002
    Publication date: October 16, 2003
    Applicant: International Business Machines Corporation
    Inventors: Karl Frank Beckle, Michael William Chaw, Richard H. Koch, Mark Clinton Thurber, Bruno Alejandro Valdes