Connie Yuan 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:

8053096, Nov 8, 2011

Filed:

Jul 23, 2008

Appl. No.:

12/178375

Inventors:

Alexander Hazanov - Mountain View CA, US
Connie Chunling Liu - San Jose CA, US
Qixu Chen - Milpitas CA, US
Xinwei Li - Fremont CA, US
Shanghsien Alex Rou - Fremont CA, US

Assignee:

Seagate Technology LLC - Cupertino CA

International Classification:

G11B 5/66

US Classification:

4288312, 4288323, 427131

Abstract:

The invention relates to a perpendicular magnetic recording medium having a substrate and a seed layer comprising a Ni alloy.

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.