Patents by Inventor John M. Wolf
John M. Wolf 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).
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Patent number: 9697852Abstract: A data writer may be configured with at least a write pole continuously extending from an air bearing surface to a via. The write pole can contact at least one yoke that contacts the write pole. The write pole and yoke may each be disposed between and separated from a write coil that has a single turn and continuously extends to opposite sides of the write pole.Type: GrantFiled: November 6, 2015Date of Patent: July 4, 2017Assignee: Seagate Technology LLCInventors: JianHua Xue, Debin Wang, Huaqing Yin, John M. Wolf, Erik J. Hutchinson, Wei Tian, Yonghua Chen
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Patent number: 9691419Abstract: Electrostatic discharge protection can be afforded to a data recording head in accordance with various embodiments. A data recording head may consist of a circuit having a preamp ground connected to a ground substrate via a ground trace. The ground trace can consist of a first leg connected to the ground substrate and a second leg with an open connection extending from a dice line.Type: GrantFiled: December 17, 2015Date of Patent: June 27, 2017Assignee: Seagate Technology LLCInventors: Daniel W. Olson, John M. Wolf, Declan Macken, Gavin L. Brinkley
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Publication number: 20170178669Abstract: Electrostatic discharge protection can be afforded to a data recording head in accordance with various embodiments. A data recording head may consist of a circuit having a preamp ground connected to a ground substrate via a ground trace. The ground trace can consist of a first leg connected to the ground substrate and a second leg with an open connection extending from a dice line.Type: ApplicationFiled: December 17, 2015Publication date: June 22, 2017Inventors: Daniel W. Olson, John M. Wolf, Declan Macken, Gavin L. Brinkley
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Publication number: 20170133043Abstract: A data writer may be configured with at least a write pole continuously extending from an air bearing surface to a via. The write pole can contact at least one yoke that contacts the write pole. The write pole and yoke may each be disposed between and separated from a write coil that has a single turn and continuously extends to opposite sides of the write pole.Type: ApplicationFiled: November 6, 2015Publication date: May 11, 2017Inventors: JianHua Xue, Debin Wang, Huaqing Yin, John M. Wolf, Erik J. Hutchinson, Wei Tian, Yonghua Chen
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Patent number: 9396745Abstract: Apparatus for sensing data from a magnetic recording medium using a multi-sensor reader with different readback sensitivities. In accordance with some embodiments, a data transducing head has first and second read sensors. The first read sensor is optimized for reading data and the second read sensor is optimized to detect thermal asperity (TA) events.Type: GrantFiled: March 7, 2014Date of Patent: July 19, 2016Assignee: Seagate Technology LLCInventors: Declan Macken, Jason Gadbois, Eric W. Singleton, John M. Wolf
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Patent number: 9153257Abstract: A write head having reduced dimensions. In one implementation, the write head has a main pole having a leading side and a trailing side, a leading yoke on the leading side of the main pole, and a coil wrapped around the main pole and the leading yoke. The coil on the leading side and the leading yoke having a distance of no greater than 300 nm therebetween, and the coil on the trailing side and the main pole having a distance of no greater than 350 nm therebetween. In an alternate implementation, the write head has a trailing yoke, with the coil on the trailing side and the trailing yoke having a distance of no greater than 350 nm therebetween.Type: GrantFiled: July 10, 2015Date of Patent: October 6, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: John M. Wolf, Jianhua Xue, Kevin Heim, Kirill Rivkin, Huaqing Yin
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Publication number: 20150255092Abstract: Apparatus for sensing data from a magnetic recording medium using a multi-sensor reader with different readback sensitivities. In accordance with some embodiments, a data transducing head has first and second read sensors. The first read sensor is optimized for reading data and the second read sensor is optimized to detect thermal asperity (TA) events.Type: ApplicationFiled: March 7, 2014Publication date: September 10, 2015Applicant: Seagate Technology LLCInventors: Declan Macken, Jason Gadbois, Eric W. Singleton, John M. Wolf
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Patent number: 9082427Abstract: A write head having reduced dimensions. In one implementation, the write head has a main pole having a leading side and a trailing side, a leading yoke on the leading side of the main pole, and a coil wrapped around the main pole and the leading yoke. The coil on the leading side and the leading yoke having a distance of no greater than 300 nm therebetween, and the coil on the trailing side and the main pole having a distance of no greater than 350 nm therebetween. In an alternate implementation, the write head has a trailing yoke, with the coil on the trailing side and the trailing yoke having a distance of no greater than 350 nm therebetween.Type: GrantFiled: September 25, 2014Date of Patent: July 14, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: John M. Wolf, Jianhua Xue, Kevin Heim, Kirill Rivkin, Huaqing Yin
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Patent number: 8929030Abstract: A writer includes a write element having a tip portion to generate a write field during a write operation and a conductive assembly that delivers a write assist current through the tip portion in a cross-track direction to generate a write assist field during the write operation that extends beyond a medium confronting surface located at the tip portion to lower a coercivity of a magnetic medium proximate to the write element.Type: GrantFiled: March 15, 2007Date of Patent: January 6, 2015Assignee: Seagate Technology LLCInventors: Chunhong Hou, Shaoping Li, John M. Wolf, Sining Mao
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Patent number: 8873199Abstract: A recording head comprising a write pole and a coil structure asymmetric with respect to the write pole and configured to generate more magnetic flux on a trailing side of the main pole than the magnetic flux on a front side of the main pole.Type: GrantFiled: March 17, 2014Date of Patent: October 28, 2014Assignee: Seagate Technology LLCInventors: Eric Roger Meolche, Chris Rea, Jianhua Xue, Eric Linville, John M. Wolf
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Publication number: 20140268416Abstract: A recording head comprising a write pole and a coil structure asymmetric with respect to the write pole and configured to generate more magnetic flux on a trailing side of the main pole than the magnetic flux on a front side of the main pole.Type: ApplicationFiled: March 17, 2014Publication date: September 18, 2014Applicant: Seagate Technology LLCInventors: Eric Roger Meloche, Chris Rea, Jianhua Xue, Eric Linville, John M. Wolf
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Patent number: 8687318Abstract: A recording head comprising a write pole and a coil structure asymmetric with respect to the write pole and configured to generate more magnetic flux on a trailing side of the main pole than the magnetic flux on a front side of the main pole.Type: GrantFiled: March 13, 2012Date of Patent: April 1, 2014Assignee: Seagate Technology LLCInventors: Eric Roger Meloche, Chris Rea, Jianhua Xue, Eric Linville, John M. Wolf
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Publication number: 20130242432Abstract: A recording head comprising a write pole and a coil structure asymmetric with respect to the write pole and configured to generate more magnetic flux on a trailing side of the main pole than the magnetic flux on a front side of the main pole.Type: ApplicationFiled: March 13, 2012Publication date: September 19, 2013Applicant: SEAGATE TECHNOLOGY LLCInventors: Eric Roger Meloche, Chris Rea, Jianhua Xue, Eric Linville, John M. Wolf
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Publication number: 20080225435Abstract: A writer includes a write element having a tip portion for generating a write field and a conductive assembly that delivers a write assist current through the tip portion to generate a write assist field.Type: ApplicationFiled: March 15, 2007Publication date: September 18, 2008Applicant: Seagate Technology LLCInventors: Chunhong Hou, Shaoping Li, John M. Wolf, Sining Mao