Patents by Inventor Dwight Cornwell

Dwight Cornwell 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: 7465532
    Abstract: A method for fabricating a thin film component according to one embodiment comprises forming a wafer having a thin film layer, a release layer, and a patterned layer of photoresist; transferring the pattern of the layer of photoresist to the release layer and the thin film layer; adding a layer of metal to the wafer; heating the wafer to a predetermined temperature for a period of time sufficient to cause deformation of the photoresist to an extent that the photoresist creates cracks in the metal layer; applying a solvent to dissolve at least a portion of the release layer, the solvent penetrating the cracks in the metal layer to reach the release layer; and removing the release layer and any portions of the layers above the release layer.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: December 16, 2008
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Dwight Cornwell, Douglas Johnson Werner
  • Publication number: 20080026325
    Abstract: A method for fabricating a thin film component according to one embodiment comprises forming a wafer having a thin film layer, a release layer, and a patterned layer of photoresist; transferring the pattern of the layer of photoresist to the release layer and the thin film layer; adding a layer of material to the wafer; heating the wafer to a predetermined temperature for a period of time sufficient to cause deformation of the photoresist to an extent that the photoresist creates cracks in the material layer; applying a solvent to dissolve at least a portion of the release layer, the solvent penetrating the cracks in the material layer to reach the release layer; and removing the release layer and any portions of the layers above the release layer.
    Type: Application
    Filed: October 10, 2007
    Publication date: January 31, 2008
    Inventors: Dwight Cornwell, Douglas Werner
  • Patent number: 7297470
    Abstract: A method for fabricating a thin film component includes forming a wafer having a thin film layer, a release layer, and a patterned layer of photoresist. The pattern of the layer of photoresist is transferred to the release layer and the thin film layer. A layer of metal is added to the wafer. The wafer is heated to a temperature above a glass transition temperature of the photoresist for a period of time sufficient to cause deformation of the photoresist to an extent that the photoresist creates cracks in the metal layer. A solvent is applied to the wafer to dissolve the release layer, the solvent penetrating the cracks in the metal layer to reach the release layer. The release layer and any material above the release layer are removed.
    Type: Grant
    Filed: January 5, 2004
    Date of Patent: November 20, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Dwight Cornwell, Douglas Johnson Werner
  • Publication number: 20050147924
    Abstract: A method for fabricating a thin film component includes forming a wafer having a thin film layer, a release layer, and a patterned layer of photoresist. The pattern of the layer of photoresist is transferred to the release layer and the thin film layer. A layer of metal is added to the wafer. The wafer is heated to a temperature above a glass transition temperature of the photoresist for a period of time sufficient to cause deformation of the photoresist to an extent that the photoresist creates cracks in the metal layer. A solvent is applied to the wafer to dissolve the release layer, the solvent penetrating the cracks in the metal layer to reach the release layer. The release layer and any material above the release layer are removed.
    Type: Application
    Filed: January 5, 2004
    Publication date: July 7, 2005
    Inventors: Dwight Cornwell, Douglas Werner
  • Patent number: 6785103
    Abstract: A magnetoresistance sensor includes a substrate and a sensor structure deposited upon the substrate and having a first lateral side and a second lateral side. The sensor structure includes a layered transverse biasing structure, a free layer deposited upon the layered transverse biasing structure, and a cap layer deposited upon a central portion of the free layer but not upon a side portion of the free layer adjacent to each lateral side. Longitudinal hard biasing structures are disposed laterally adjacent to the lateral sides of the sensor structure. Each longitudinal hard biasing structure has a magnetic seed layer deposited upon the substrate, the respective lateral side of the sensor structure, and the respective side portion of the free layer. A magnetic hard bias layer is deposited upon the seed layer.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: August 31, 2004
    Assignee: International Business Machines Corporation
    Inventors: Dwight Cornwell, Jr., Hardayal Singh Gill, Mustafa Pinarbasi
  • Patent number: 6662432
    Abstract: A free layer for a spin valve sensor includes a cobalt iron (CoFe) film which has an easy axis oriented perpendicular to an air bearing surface (ABS) of a read head and a nickel iron (NiFe) film which has an easy axis oriented parallel to the ABS and parallel to the major planes of the thin film layers. In a further embodiment the free layer is annealed at a high temperature in the presence of a field which is oriented perpendicular to the ABS.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: December 16, 2003
    Assignee: International Business Machines Corporation
    Inventors: Hamid Balamane, Dwight Cornwell, Jr., Hardayal Singh Gill, Serhat Metin, Mustafa Pinarbasi
  • Publication number: 20030193761
    Abstract: A magnetoresistance sensor includes a substrate and a sensor structure deposited upon the substrate and having a first lateral side and a second lateral side. The sensor structure includes a layered transverse biasing structure, a free layer deposited upon the layered transverse biasing structure, and a cap layer deposited upon a central portion of the free layer but not upon a side portion of the free layer adjacent to each lateral side. Longitudinal hard biasing structures are disposed laterally adjacent to the lateral sides of the sensor structure. Each longitudinal hard biasing structure has a magnetic seed layer deposited upon the substrate, the respective lateral side of the sensor structure, and the respective side portion of the free layer. A magnetic hard bias layer is deposited upon the seed layer.
    Type: Application
    Filed: April 12, 2002
    Publication date: October 16, 2003
    Inventors: Dwight Cornwell, Hardayal Singh Gill, Mustafa Pinarbasi
  • Publication number: 20020126425
    Abstract: A free layer for a spin valve sensor includes a cobalt iron (CoFe) film which has an easy axis oriented perpendicular to an air bearing surface (ABS) of a read head and a nickel iron (NiFe) film which has an easy axis oriented parallel to the ABS and parallel to the major planes of the thin film layers. In a further embodiment the free layer is annealed at a high temperature in the presence of a field which is oriented perpendicular to the ABS.
    Type: Application
    Filed: January 2, 2001
    Publication date: September 12, 2002
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Hamid Balamane, Dwight Cornwell, Hardayal Singh Gill, Serhat Metin, Mustafa Pinarbasi