Connie Y Liu

US Patent:

6410104, Jun 25, 2002

Filed:

Jan 24, 2000

Appl. No.:

09/489935

Inventors:

Linda L. Zhong - Fremont CA
Connie C. Liu - San Jose CA
Jeff D. St. John - Los Gatos CA

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

B05D 512

US Classification:

427554, 427130, 427131, 427132, 427343, 427405, 4274191, 427438

Abstract:

Electrolessly plated NiâP amorphous coatings having an increased magnetic transformation temperature and ultra smooth surface are achieved employing a plating bath containing Al and/or Cu ions. Embodiments include electrolessly depositing an amorphous NiâP coating exhibiting a magnetic transformation temperature of at least 330Â C. proximate a laser textured protrusion.

US Patent:

6629878, Oct 7, 2003

Filed:

Nov 8, 1999

Appl. No.:

09/435812

Inventors:

Linda L. Zhong - Fremont CA
Connie C. Liu - San Jose CA
Roger Rostron Wills - Corona CA
Jeff A. Railton - Placentia CA
Shawn A. Mawla - San Jose CA
Jeff D. St. John - Los Gatos CA

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

B24B 700

US Classification:

451 54, 451 28

Abstract:

Surface processing of metal, such as CMP, is enhanced and defects reduced by pretreatment to remove a surface layer exhibiting properties different from the bulk metal, such as a baked on oxide layer. Embodiments of the present invention include acid soaking a non-magnetic substrate having an Al, Ni or NiâP surface with a baked oxide film thereon, thereby removing the oxide film and rendering the reduced surface amenable to CMP with reduced defects, reduced surface roughness and increased production throughput.

US Patent:

6685990, Feb 3, 2004

Filed:

Feb 22, 2000

Appl. No.:

09/510533

Inventors:

Linda Lijun Zhong - Fremont CA
Connie Chunling Liu - San Jose CA
Shawn A. Mawla - San Jose CA
Jeff Duane St. John - Los Gatos CA
Jeffrey Lee Petrehn - Fremont CA

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

B05D 118

US Classification:

427438, 427129, 427131, 427132, 427405, 4274431

Abstract:

Abnormal nodule formation during electroless plating, e. g. , of amorphous NiP âseedâ layers utilized in the manufacture of magnetic recording media, is eliminated or substantially reduced by performing the electroless plating process in an apparatus employing polymeric or polymer-based materials which are substantially resistant to degradation upon prolonged contact with the electroless plating bath at an elevated temperature, i. e. , release of soluble, low molecular weight, carbon-containing species which are incorporated in the electroless plating deposit and act as nucleation centers for abnormal growth leading to nodule formation. Suitable degradation-resistant polymeric materials for use as fittings, piping, racks, tanks, etc. of the electroless plating apparatus include fluorine-containing hydrocarbons and fluorocarbons.

US Patent:

7736766, Jun 15, 2010

Filed:

Feb 24, 2006

Appl. No.:

11/361004

Inventors:

Erol Girt - Berkeley CA, US
Chung Yuang Shih - Cupertino CA, US
Miaogen Lu - Fremont CA, US
Connie Chunling Liu - San Jose CA, US
Mariana Rodica Munteanu - Santa Clara CA, US
Jean Ling Lee - San Jose CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/66

US Classification:

428829, 4288281, 4288361

Abstract:

A magnetic recording medium having a Au, Ag-containing magnetic layer having Co, Cr, Ag and Au; the magnetic recording layer having Co-containing magnetic grains surrounded by substantially nonmagnetic Cr-containing grain boundaries; wherein said Ag and said Au are substantially immiscible in the Co-containing magnetic grains is disclosed.

US Patent:

8101292, Jan 24, 2012

Filed:

Apr 30, 2010

Appl. No.:

12/771962

Inventors:

Erol Girt - Berkeley CA, US
Chung Yuang Shih - Cupertino CA, US
Miaogen Lu - Fremont CA, US
Connie Chunling Liu - San Jose CA, US
Mariana Rodica Munteanu - Santa Clara CA, US
Jean Ling Lee - San Jose CA, US

Assignee:

Seagate Technology LLC - Cupertino CA

International Classification:

G11B 5/673

US Classification:

428829

Abstract:

A magnetic recording medium having a Au, Ag-containing magnetic layer having Co, Cr, Ag and Au; the magnetic recording layer having Co-containing magnetic grains surrounded by substantially nonmagnetic Cr-containing grain boundaries; wherein said Ag and said Au are substantially immiscible in the Co-containing magnetic grains is disclosed.

US Patent:

8465854, Jun 18, 2013

Filed:

Dec 1, 2006

Appl. No.:

11/606998

Inventors:

Li Tang - Fremont CA, US
Weilu Xu - San Jose CA, US
Youfeng Zheng - San Jose CA, US
Shanghsien Rou - Fremont CA, US
Connie Chunling Liu - San Jose CA, US
Jianhua Xue - Maple Grove MN, US
Li-Lien Lee - San Jose CA, US

Assignee:

Seagate Technology LLC - Cupertino CA

International Classification:

G11B 5/65

US Classification:

428836

Abstract:

A perpendicular magnetic recording medium comprises a non-magnetic substrate having a surface; and a plurality of overlying thin film layers forming a layer stack on the substrate surface, the layer stack including a magnetically hard perpendicular magnetic recording layer structure and an underlying soft magnetic underlayer (SUL), the SUL having a thickness of up to about 100 Å. Also disclosed is a data/information recording, storage, and retrieval system comprising the perpendicular magnetic recording medium and a single-pole magnetic transducer head including main and auxiliary poles positioned in spaced adjacency to an upper surface of the layer stack, the single-pole transducer head comprising a front shield adjacent the main pole.

US Patent:

20100020441, Jan 28, 2010

Filed:

Jul 25, 2008

Appl. No.:

12/180093

Inventors:

Zhong Stella Wu - Fremont CA, US
Samuel Dacke Harkness - Berkeley CA, US
Mariana R. Munteanu - Santa Clara CA, US
Qixu Chen - Milpitas CA, US
Connie Chunling Liu - San Jose CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/82
B05D 5/12

US Classification:

360135, 427131

Abstract:

A perpendicular magnetic recording medium having a dual-layer magnetic film is disclosed. The bottom layer is completely exchange decoupled, and the top layer contains a certain amount of exchange coupling optimized for recording performance. Preferably, the bottom magnetic layer contains stable oxide material (for example, TiO) and other non-magnetic elements (for example, Cr). A method of manufacturing the media is also disclosed.

US Patent:

20110003175, Jan 6, 2011

Filed:

Jan 7, 2010

Appl. No.:

12/684070

Inventors:

Bogdan Florin Valcu - Fremont CA, US
Qixu Chen - Milpitas CA, US
Connie Chunling Liu - San Jose CA, US
Chun Wang - Fremont CA, US
Shoutao Wang - Fremont CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/33
G11B 5/84

US Classification:

428800, 427127

Abstract:

A perpendicular magnetic recording layer may include a hard granular layer, an exchange break layer formed on the hard granular layer, and a soft granular layer formed on the exchange break layer. In some embodiments, the exchange break layer may consist essentially of ruthenium. In some embodiments, the perpendicular magnetic recording layer may include n magnetic layers and n−1 exchange break layers, where n is greater than or equal to three, and where the n−1 exchange break layers alternate with the n magnetic layers in the magnetic recording layer.