Patents by Inventor Gregory P. Shaffer

Gregory P. Shaffer 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).

  • Methods of manufacturing magnetic heads using a trigger reader electronic lapping guide
    Patent number: 9646636
    Abstract: A method of manufacturing a magnetic read-write head, including the steps of presenting a row bar to a processing location, the row bar including an air bearing surface, at least one read-write head, at least one electronic lapping guide, and at least one trigger device, wherein each electronic lapping guide is positioned at a different distance from the air bearing surface than each trigger device, and wherein the read-write head and at least one of the trigger devices include a multi-layer stack of materials; lapping the air bearing surface while measuring the electrical resistance of at least one electronic lapping guide and at least one trigger device until the resistance measurement of the trigger device provides an open circuit reading, and measuring an offset resistance value of the at least one electronic lapping guide concurrently with the measurement of the open circuit reading by the trigger device.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: May 9, 2017
    Assignee: Seagate Technology LLC
    Inventors: Jeffrey R. O'Konski, Garrick F. Shurts, Greg A. Schmitz, Gregory P. Shaffer
  • METHODS OF MANUFACTURING MAGNETIC HEADS USING A TRIGGER READER ELECTRONIC LAPPING GUIDE
    Publication number: 20160071535
    Abstract: A method of manufacturing a magnetic read-write head, including the steps of presenting a row bar to a processing location, the row bar including an air bearing surface, at least one read-write head, at least one electronic lapping guide, and at least one trigger device, wherein each electronic lapping guide is positioned at a different distance from the air bearing surface than each trigger device, and wherein the read-write head and at least one of the trigger devices include a multi-layer stack of materials; lapping the air bearing surface while measuring the electrical resistance of at least one electronic lapping guide and at least one trigger device until the resistance measurement of the trigger device provides an open circuit reading, and measuring an offset resistance value of the at least one electronic lapping guide concurrently with the measurement of the open circuit reading by the trigger device.
    Type: Application
    Filed: November 16, 2015
    Publication date: March 10, 2016
    Inventors: Jeffrey R. O'Konski, Garrick F. Shurts, Greg A. Schmitz, Gregory P. Shaffer
  • Methods of manufacturing magnetic heads using a trigger reader electronic lapping guide
    Patent number: 9190083
    Abstract: A method of manufacturing a magnetic read-write head, including the steps of presenting a row bar to a processing location, the row bar including an air bearing surface, at least one read-write head, at least one electronic lapping guide, and at least one trigger device, wherein each electronic lapping guide is positioned at a different distance from the air bearing surface than each trigger device, and wherein the read-write head and at least one of the trigger devices include a multi-layer stack of materials; lapping the air bearing surface while measuring the electrical resistance of at least one electronic lapping guide and at least one trigger device until the resistance measurement of the trigger device provides an open circuit reading, and measuring an offset resistance value of the at least one electronic lapping guide concurrently with the measurement of the open circuit reading by the trigger device.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: November 17, 2015
    Assignee: Seagate Technology LLC
    Inventors: Jeffrey R. O'Konski, Garrick F. Shurts, Greg A. Schmitz, Gregory P. Shaffer
  • METHODS OF MANUFACTURING MAGNETIC HEADS USING A TRIGGER READER ELECTRONIC LAPPING GUIDE
    Publication number: 20150103443
    Abstract: A method of manufacturing a magnetic read-write head, including the steps of presenting a row bar to a processing location, the row bar including an air bearing surface, at least one read-write head, at least one electronic lapping guide, and at least one trigger device, wherein each electronic lapping guide is positioned at a different distance from the air bearing surface than each trigger device, and wherein the read-write head and at least one of the trigger devices include a multi-layer stack of materials; lapping the air bearing surface while measuring the electrical resistance of at least one electronic lapping guide and at least one trigger device until the resistance measurement of the trigger device provides an open circuit reading, and measuring an offset resistance value of the at least one electronic lapping guide concurrently with the measurement of the open circuit reading by the trigger device.
    Type: Application
    Filed: October 14, 2013
    Publication date: April 16, 2015
    Applicant: Seagate Technology LLC
    Inventors: Jeffrey R. O'Konski, Garrick F. Shurts, Greg A. Schmitz, Gregory P. Shaffer