1
Shaoping Li, Yimin Guo, Francis H Liu, Sining Mao: Disk drive comprising a dual read element and delay circuitry to improve read signal. Western Digital, March 20, 2012: US08139301 (158 worldwide citation)

A disk drive is disclosed comprising a disk having a plurality of data tracks, and a head actuated over the disk, the head comprising a first read element and a second read element. A data track is read to generate a first read signal emanating from the first read element and a second read signal em ...


2
Kuok San Ho, Savas Gider, Daniele Mauri, Ming Mao, Sining Mao: Method and system for providing a read transducer having a reduced shield-to-shield spacing. Western Digital, March 18, 2014: US08675318 (155 worldwide citation)

A method and system for providing a read magnetic transducer having an air-bearing surface (ABS) is described. The magnetic read transducer includes a first shield, a read sensor stack, an antiferromagnetic (AFM) tab, and a second shield. The read sensor stack includes a pinned layer, a spacer layer ...


3
Qunwen Leng, Chando Park, Yimin Guo, Christian Kaiser, Mahendra Pakala, Sining Mao: Method and system for providing a read sensor having a low magnetostriction free layer. Western Digital, June 5, 2012: US08194365 (150 worldwide citation)

A method and system for providing a magnetic structure in magnetic transducer is described. The magnetic structure includes a pinned layer, a nonmagnetic spacer layer, and a free layer. The nonmagnetic spacer layer is between the pinned layer and the free layer. The free layer includes a first magne ...


4
Zhigang Bai, Lisha Wang, Tao Pan, Yugang Wang, Matthew R Gibbons, Sining Mao: Method and system for providing a perpendicular magnetic recording writer. Western Digital, May 15, 2012: US08179636 (150 worldwide citation)

A method and system for providing a magnetic transducer for recording to media is described. The method and system include providing a first pole, a main pole, an auxiliary pole, and at least one coil. The main pole has a first media-facing surface including a recessed portion and a write portion. T ...


5
Shaoping Li, Yimin Guo, Feng Liu, Wei Zhang, Sining Mao: TMR read head structures with differential stripe heights. Western Digital, June 5, 2012: US08194366 (145 worldwide citation)

A tunneling magnetoresistance (TMR) read head and a method of producing the same are disclosed. A free layer having a free layer stripe height is provided, the free layer having a first side and a second side. A tunneling barrier layer is formed adjacent to the first side of the free layer, the tunn ...


6
Feng Liu, Tao Pan, Zhigang Bai, Yugang Wang, Sining Mao: Magnetic recording head with nano scale pole tip bulge. Western Digital, August 27, 2013: US08520336 (144 worldwide citation)

A perpendicular magnetic recording head for use in a hard disk drive has a main pole that has a main pole tip in proximity to an air bearing surface. The main pole tip has a first width at the ABS, extending distally at a first angle measured from the plane of the ABS to a second width measured at a ...


7
Qunwen Leng, Christian Kaiser, Yimin Guo, Mahendra Pakala, Sining Mao: Magnetoresistive sensors having an improved free layer. Western Digital, July 30, 2013: US08498084 (142 worldwide citation)

A magnetoresistive sensor having a novel free layer and a method of producing the same are disclosed. The magnetoresistive sensor comprises a pinned layer, a barrier layer disposed over the pinned layer, and a free layer disposed over the barrier layer. The free layer comprises a first magnetic laye ...


8
Zhigang Bai, Suping Song, Matthew R Gibbons, Sining Mao: Method and system for providing a magnetic head using a composite magnetic material in the recording transducer. September 4, 2012: US08259410 (141 worldwide citation)

A method and system for providing a magnetic transducer for recording to media is described. The method and system include providing a first pole, a main pole, at least one coil and at least one auxiliary pole. The main pole is for providing a magnetic field for recording to the media. The coil(s) a ...


9
Shaoping Li, Yimin Guo, Francis H Liu, Sining Mao: Disk drive comprising a dual read element and delay circuitry to improve read signal. Western Digital, August 20, 2013: US08514506 (121 worldwide citation)

A disk drive is disclosed comprising a disk having a plurality of data tracks, and a head actuated over the disk, the head comprising a first read element and a second read element. A data track is read to generate a first read signal emanating from the first read element and a second read signal em ...


10
Sining Mao, Eric Shane Linville, Zheng Gao, Brian William Karr, Janusz Jozef Nowak, Olle Gunnar Heinonen: Structure to achieve sensitivity and linear density in tunneling GMR heads using orthogonal magnetic alignments. Seagate Technology, April 25, 2006: US07035062 (95 worldwide citation)

The present invention provides a tunneling magneto-resistive read sensor structure that improves sensitivity and linear density of the sensor structure. The sensor includes first and second electrodes and a stack positioned between the electrodes. The stack includes first and second free layers with ...