Hong Ping L Wang

US Patent:

6600637, Jul 29, 2003

Filed:

Apr 3, 2000

Appl. No.:

09/541218

Inventors:

Hong Wang - Savage MN
Robbee L. Grimm - Lakeville MN
Matthew T. Johnson - Roseville MN
John P. Spangler - Burnsville MN
Craig A. Ballentine - Bloomington MN
Qing He - Bloomington MN
Steven C. Riemer - Minneapolis MN
Brian J. Daniels - Eagan MN

Assignee:

Seagate Technology, L.L.C. - Scotts Valley CA

International Classification:

G11B 5127

US Classification:

360324

Abstract:

A magnetic data storage and retrieval system has a bottom shield, a first half gap positioned on the bottom shield, a sensor layer positioned on the first half gap, a second half gap positioned on the sensor layer; and a top shield positioned on the second half gap. The sensor layer includes a magnetoresistive sensor having sidewalls and a barrier surrounding and in direct contact with the sidewalls of the magnetoresistive sensor.

US Patent:

6778357, Aug 17, 2004

Filed:

Oct 24, 2001

Appl. No.:

10/084729

Inventors:

Ibro Tabakovic - Edina MN
Paul A. Jallen - Elko MN
John Rice - Long Lake MN
Steve C. Riemer - Minneapolis MN
Venkateswara R. Inturi - Shakopee MN
Lyle P. Cox - Long Lake MN
Hong Wang - Savage MN
Robbee L. Grimm - Lakeville MN
Erik Hutchinson - Lakeville MN
Charles Ericson - Oakdale MN

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5147

US Classification:

360126

Abstract:

A magnetic head for use in magnetic data storage systems is provided. The magnetic head includes a substantially non-magnetic writer gap layer and pair of magnetic poles separated by the writer gap layer. A first of the poles includes a first layer formed of a CoNiFe alloy that has a saturation magnetic moment greater than 2. 1 Tesla. Methods of fabricating such a head are also disclosed.

US Patent:

7207098, Apr 24, 2007

Filed:

Jun 27, 2003

Appl. No.:

10/607779

Inventors:

Huaqing Yin - Eden Prarie MN, US
David C. Seets - Minnetonka MN, US
Hong Wang - Savage MN, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/187
G11B 5/23

US Classification:

2960312, 2960315, 2960316, 2960318, 360119, 360126, 360324, 360326

Abstract:

A method of forming a reader of a magnetic head includes multiple processing steps. First, a sensor is formed having an air bearing surface. Next, a hard mask is formed on the sensor extending a distance from the air bearing surface substantially equal to the desired stripe height of the sensor. Finally, a portion of the sensor not covered by the hard mask is removed.

US Patent:

62785923, Aug 21, 2001

Filed:

Oct 19, 1999

Appl. No.:

9/420934

Inventors:

Song S. Xue - Eden Prairie MN
Qing I. He - Bloomington MN
Hong Wang - Savage MN
Kristin J. Duxstad - Eden Prairie MN
Michael B. Hintz - Mahtomedi MN

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 539

US Classification:

36032412

Abstract:

A giant magnetoresistive spin valve read sensor includes a bilayer seed layer and a stack of films. The bilayer seed layer includes a TaN seed layer and a NiFeCr seed layer. The stack of films includes a free layer adjacent the NiFeCr seed layer, a pinning layer, a pinned layer positioned between the free layer and the pinning layer, and a spacer layer positioned between the free layer and the pinned layer. The bilayer seed layer is used to promote the texture and grain growth of each of the layers subsequently grown upon the seed layer. The free layer has a rotatable magnetic moment, while the pinned layer has a fixed magnetic moment. The resistance of the giant magnetoresistive spin valve read sensor varies as a function of an angle formed between the magnetization of the free layer and the magnetization of the pinned layer.