Patents by Inventor Alan Jun-Yuan Tam

Alan Jun-Yuan Tam 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).

  • Magnetic head for hard disk drive having varied composition nickel-iron alloy magnetic poles
    Patent number: 6912771
    Abstract: A magnetic head for a hard disk drive. The magnetic poles of the head are formed with a NiFe alloy having a graduated composition in which a higher Fe concentration is fabricated proximate the write gap layer between the magnetic poles. Each magnetic pole is fabricated in a single electroplating step in which the duty cycle of the electroplating current is altered during the electroplating operation. Where the duty cycle is greatest the Fe ion concentration is likewise greatest.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: July 5, 2005
    Assignee: International Business Machines Corporation
    Inventors: Thomas Edward Dinan, Neil Leslie Robertson, Alan Jun-Yuan Tam
  • Magnetic head for hard disk drive having varied composition nickel-iron alloy magnetic poles
    Publication number: 20040174633
    Abstract: A magnetic head for a hard disk drive. The magnetic poles of the head are formed with a NiFe alloy having a graduated composition in which a higher Fe concentration is fabricated proximate the write gap layer between the magnetic poles. Each magnetic pole is fabricated in a single electroplating step in which the duty cycle of the electroplating current is altered during the electroplating operation. Where the duty cycle is greatest the Fe ion concentration is likewise greatest.
    Type: Application
    Filed: March 8, 2004
    Publication date: September 9, 2004
    Inventors: Thomas Edward Dinan, Neil Leslie Robertson, Alan Jun-Yuan Tam
  • Magnetic head for hard disk drive having varied composition nickel-iron alloy magnetic poles
    Patent number: 6724571
    Abstract: A magnetic head for a hard disk drive. The magnetic poles of the head are formed with a NiFe alloy having a graduated composition in which a higher Fe concentration is fabricated proximate the write gap layer between the magnetic poles. Each magnetic pole is fabricated in a single electroplating step in which the duty cycle of the electroplating current is altered during the electroplating operation. Where the duty cycle is greatest the Fe ion concentration is likewise greatest.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: April 20, 2004
    Assignee: International Business Machines Corporation
    Inventors: Thomas Edward Dinan, Neil Leslie Robertson, Alan Jun-Yuan Tam
  • Magnetic head for hard disk drive having varied composition nickel-iron alloy magnetic poles
    Publication number: 20020154442
    Abstract: A magnetic head for a hard disk drive. The magnetic poles of the head are formed with a NiFe alloy having a graduated composition in which a higher Fe concentration is fabricated proximate the write gap layer between the magnetic poles. Each magnetic pole is fabricated in a single electroplating step in which the duty cycle of the electroplating current is altered during the electroplating operation. Where the duty cycle is greatest the Fe ion concentration is likewise greatest.
    Type: Application
    Filed: September 13, 2001
    Publication date: October 24, 2002
    Inventors: Thomas Edward Dinan, Neil Leslie Robertson, Alan Jun-Yuan Tam