Quang V Le

US Patent:

7002775, Feb 21, 2006

Filed:

Sep 30, 2003

Appl. No.:

10/676742

Inventors:

Yimin Hsu - Sunnyvale CA, US
Quang Le - San Jose CA, US
James Lamar Nix - Gilroy CA, US
Mason Lamar Williams - San Jose CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 5/147

US Classification:

360125

Abstract:

An embodiment of the invention is a head for perpendicular recording that has a trailing shield and side shields that are connected to the return pole piece by two studs of ferromagnetic material. The studs extend parallel to the track direction and are located a sufficient distance away from the main pole piece to reduce the flux flow from the main pole piece to the studs. Optionally the studs can be recessed behind the air-bearing surface. The preferred embodiment of the invention is a magnetic transducer with separated read and write heads for perpendicular recording.

US Patent:

7009812, Mar 7, 2006

Filed:

Sep 29, 2003

Appl. No.:

10/675046

Inventors:

Yimin Hsu - Sunnyvale CA, US
Quang Le - San Jose CA, US
Hin Pong Edward Lee - San Jose CA, US
James Lamar Nix - Gilroy CA, US
Aron Pentek - San Jose CA, US
Kurt Rubin - San Jose CA, US
Neil Smith - San Jose CA, US
Nian Xiang Sun - Sunnyvale CA, US
Walter Eugene Weresin - San Jose CA, US
Mason Lamar Williams - San Jose CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 5/147

US Classification:

360126

Abstract:

The invention is a magnetic transducer with separated read and write heads for perpendicular recording. The write head has a trailing shield that extends from the return pole piece toward the main pole piece to form the write gap at the air-bearing surface. One embodiment of the trailing shield is a two part structure with a pedestal and a much smaller tip that confronts the main pole piece at the gap. In one embodiment a sink of non-magnetic, electrically conductive material is disposed in the separation gap between the read head and the flux bearing pole piece. The sink is preferably made of copper and does not extend to the ABS.

US Patent:

7196871, Mar 27, 2007

Filed:

Sep 26, 2003

Appl. No.:

10/671639

Inventors:

Yimin Hsu - Sunnyvale CA, US
Quang Le - San Jose CA, US
Mason Lamar Williams - San Jose CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 5/31
G11B 5/11

US Classification:

360125, 360126, 360128

Abstract:

Heads for perpendicular recording using a floating-trailing shield as part of the magnetic circuit for writing magnetic domains in the recording media are described. The floating-trailing shield is separated from the main pole piece by a layer of non-magnetic material along its entire length and the air bearing surface of the floating-trailing shield is substantially larger than that of the main pole piece. The reluctance between the trailing shield and the underlayer in the recording medium is made so low that both are at the same magnetomotive force (or potential), so that no direct connection is needed between the floating-trailing shield and the yoke. When the head is used in a storage system with a magnetic recording medium with a soft underlayer, the floating-trailing shield is, in effect, magnetically shorted to the return pole piece during recording.

US Patent:

7212379, May 1, 2007

Filed:

Mar 31, 2004

Appl. No.:

10/815286

Inventors:

Yimin Hsu - Sunnyvale CA, US
Quang Le - San Jose CA, US
Jui-Lung Li - San Jose CA, US
Ian Robson McFadyen - San Jose CA, US
James Lamar Nix - Gilroy CA, US
Neil Leslie Robertson - Palo Alto CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 5/31

US Classification:

360126

Abstract:

A magnetic write head for use in perpendicular magnetic data recording. The write head includes a write pole and a trailing shield having a tapered surface. A return pole stitched to the trailing shield is magnetically connected with the write pole at a location away from the air bearing surface (ABS).

US Patent:

7440230, Oct 21, 2008

Filed:

Feb 20, 2007

Appl. No.:

11/708958

Inventors:

Yimin Hsu - Sunnyvale CA, US
Quang Le - San Jose CA, US
Mason Lamar Williams - San Jose CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 5/31
G11B 5/11
G11B 5/39

US Classification:

3601253, 36012503, 360128

Abstract:

Heads for perpendicular recording using a floating-trailing shield are described. The floating-trailing shield is separated from the main pole piece by a layer of non-magnetic material along its entire length and the air bearing surface of the floating-trailing shield is substantially larger than that of the main pole piece. The reluctance between the trailing shield and the underlayer in the recording medium is made so low that both are at the same magnetomotive force (or potential), so that no direct connection is needed between the floating-trailing shield and the yoke. When the head is used in a storage system with a magnetic recording medium with a soft underlayer, the floating-trailing shield is, in effect, magnetically shorted to the return pole piece during recording. In one embodiment the floating-trailing shield wraps around the sides of the main pole piece.

US Patent:

7639450, Dec 29, 2009

Filed:

Apr 27, 2005

Appl. No.:

11/116677

Inventors:

Yimin Hsu - Sunnyvale CA, US
Quang Le - San Jose CA, US
Roger William Wood - Gilroy CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 5/127

US Classification:

360125

Abstract:

A magnetic head for use in a perpendicular recording system having a novel shield structure that provides exceptional magnetic shielding from extraneous magnetic fields such as from a write coil, shaping layer or return pole of the write head. The magnetic head includes a write pole, a return pole and a magnetic shield that is magnetically connected with the return pole near the ABS and extends toward the write pole. The shield is formed with a notch at its edge closest to the write pole. The notch assures adequate physical, magnetic, and electrical separation between the write pole and the shield, while allowing un-notched portions of the shield to provide additional magnetic shielding.

US Patent:

8296930, Oct 30, 2012

Filed:

Dec 22, 2009

Appl. No.:

12/645323

Inventors:

Shin Funada - Pleasanton CA, US
Quang Le - San Jose CA, US
Thomas L. Leong - San Jose CA, US
Jui-Lung Li - San Jose CA, US
Ning Shi - San Jose CA, US
Hicham M. Sougrati - Burlingame CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B 5/127
H04R 31/00

US Classification:

2960314, 2960312, 2960313, 2960315, 2960316, 2960318, 216 62, 216 65, 216 66, 3603241, 36032411, 36032412, 3603242, 451 5, 451 41

Abstract:

A method for manufacturing a magnetoresistive sensor that results in the sensor having a very flat top magnetic shield. The process involves depositing a plurality of sensor layers and then depositing a thin high density carbon CMP stop layer over the sensor layers and forming a mask over the CMP stop layer. An ion milling is performed to define the sensor. Then a thin insulating layer and magnetic hard bias layer are deposited. A chemical mechanical polishing is performed to remove the mask and a reactive ion etching is performed to remove the remaining carbon CMP stop layer. Because the CMP stop layer is very dense and hard, it can be made very thin. This means that when it is removed by reactive ion etching, there is very little notching over the sensor, thereby allowing the upper shield to be very thin.

US Patent:

8553371, Oct 8, 2013

Filed:

Nov 24, 2010

Appl. No.:

12/954508

Inventors:

Honglin Zhu - Fremont CA, US
Liubo Hong - San Jose CA, US
Hicham M. Sougrati - Burlingame CA, US
Quang Le - San Jose CA, US
Jui-Lung Li - San Jose CA, US
Chando Park - Palo Alto CA, US

Assignee:

HGST Netherlands B.V. - Amsterdam

International Classification:

G11B 5/39

US Classification:

3603242, 360319

Abstract:

Embodiments herein generally relate to TMR readers and methods for their manufacture. The embodiments discussed herein disclose TMR readers that utilize a structure that avoids use of the DLC layer over the sensor structure and over the hard bias layer. The capping structure over the sensor structure functions as both a protective layer for the sensor structure and a CMP stop layer. The hard bias capping structure functions as both a protective structure for the hard bias layer and as a CMP stop layer. The capping structures that are free of DLC reduce the formation of notches in the second shield layer so that second shield layer is substantially flat.

Address:

620 Pacific Ave APT B, Alameda, CA 94501

VIN:

JTMRK4DV0A5096635

Make:

TOYOTA

Model:

RAV4

Year:

2010

Address:

4065 Chesterwood Dr, Silver Spring, MD 20906

VIN:

5TDZK23C48S112635

Make:

TOYOTA

Model:

SIENNA

Year:

2008