Mark A Ostrowski

US Patent:

8187452, May 29, 2012

Filed:

Apr 28, 2009

Appl. No.:

12/431705

Inventors:

Steven C. Riemer - Minneapolis MN, US
Ibro Tabakovic - Edina MN, US
Jie Gong - Eden Prairie MN, US
Hieu T. Lam - Milpitas CA, US
Mark T. Kief - Lakeville MN, US
Mark H. Ostrowski - Lakeville MN, US
Jiaoming Qiu - Minneapolis MN, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

B23H 11/00

US Classification:

205666, 205674

Abstract:

A patterned magnetic recording media and method thereof is provided. A recording layer comprises a continuous surface of more-noble elements and less-noble elements, such as CoXYZ, wherein X can be Pt, Pd, Ru, Rh, Ir, Os, or Au, wherein Y can be null or Cr, and wherein Z can be null, Cu, Ta, Ti, O, B, Ag, or TiO. The recording layer is masked, shielding areas for recording domains and exposing areas between the recording domains. A voltage bias establishes the substrate as an anode in the presence of Pt cathode, in an electrolyte bath. Ions of the less-noble element are anodically removed predominantly from the exposed areas of the recording layer for a controlled time. The controlled time minimizes oxidation of the nobler element and reduces undercutting of the recording domains. The article produced can have separating areas with surfaces substantially formed of the more-noble element.

US Patent:

8318030, Nov 27, 2012

Filed:

Jul 13, 2009

Appl. No.:

12/502180

Inventors:

Xilin Peng - Bloomington MN, US
Stacey C. Wakeham - Bloomington MN, US
Yifan Zhang - Eden Prairie MN, US
Zhongyan Wang - San Ramon CA, US
Konstantin R. Nikolaev - Edina MN, US
Mark Henry Ostrowski - Lakeville MN, US
Yonghua Chen - Edina MN, US
Juren Ding - Eden Prairie MN, US

Assignee:

Seagate Technology LLC - Cupertino CA

International Classification:

B44C 1/22

US Classification:

216 22, 216 67, 216 72, 216 75

Abstract:

A method of fabricating a magnetic device is described. A mask removing layer is formed on a layered sensing stack and a hard mask layer is formed on the mask removing layer. A first reactive ion etch is performed with a non-oxygen-based chemistry to define the hard mask layer using an imaged layer formed on the hard mask layer as a mask. A second reactive ion etch is performed with an oxygen-based chemistry to define the mask removing stop layer using the defined hard mask layer as a mask. A third reactive ion etch is performed to define the layered sensing stack using the hard mask layer as a mask. The third reactive ion etch includes an etching chemistry that performs at a lower etching rate on the hard mask layer than on the layered sensing stack.

US Patent:

8339740, Dec 25, 2012

Filed:

Feb 23, 2011

Appl. No.:

13/032673

Inventors:

Jie Zou - Eden Prairie MN, US
Kaizhong Gao - Eden Prairie MN, US
William Albert Challener - Glenville NY, US
Mark Henry Ostrowski - Lakeville MN, US
Venkateswara Rao Inturi - Shakopee MN, US
Tong Zhao - Eden Prairie MN, US
Michael Christopher Kautzky - Eagan MN, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/02

US Classification:

36012531

Abstract:

An apparatus includes a near field transducer positioned adjacent to an air bearing surface, a first magnetic pole, a heat sink positioned between the first magnetic pole and the near field transducer, and a diffusion barrier positioned between the near field transducer and the first magnetic pole. The diffusion barrier can be positioned adjacent to the magnetic pole or the near field transducer.

US Patent:

8435654, May 7, 2013

Filed:

Sep 10, 2008

Appl. No.:

12/208095

Inventors:

Bing Yen - Cupertino CA, US
Jim Hennessey - Campbell CA, US
Eric Freeman - Oakland CA, US
Kim Yang Lee - Fremont CA, US
David S. Kuo - Palo Alto CA, US
Mark Ostrowski - Lakeville MN, US

Assignee:

Seagate Technology LLC - Cupertino CA

International Classification:

G11B 5/66

US Classification:

428836, 360135

Abstract:

The invention relates to bit patterned recording media having a stop layer for chemical mechanical polishing. One embodiment of the present invention is a method of manufacturing a magnetic recording medium comprising the step of planarizing by chemical mechanical polishing until the stop layer is reached. The present invention also provides a magnetic recording medium having a stop layer.

US Patent:

8477454, Jul 2, 2013

Filed:

Nov 15, 2012

Appl. No.:

13/678017

Inventors:

Kaizhong Gao - Eden Prairie MN, US
William Albert Challener - Glenville NY, US
Mark Henry Ostrowski - Lakeville MN, US
Venkateswara Rao Inturi - Shakopee MN, US
Tong Zhao - Eden Prairie MN, US
Michael Christopher Kautzky - Eagan MN, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/02

US Classification:

36012531

Abstract:

An apparatus includes a near field transducer positioned adjacent to an air bearing surface, a first magnetic pole, a heat sink positioned between the first magnetic pole and the near field transducer, and a diffusion barrier positioned between the near field transducer and the first magnetic pole. The diffusion barrier can be positioned adjacent to the magnetic pole or the near field transducer.

US Patent:

8514671, Aug 20, 2013

Filed:

Jul 29, 2011

Appl. No.:

13/194815

Inventors:

Yongjun Zhao - Eden Prairie MN, US
Mike Allen Seigler - Eden Prairie MN, US
Mark Henry Ostrowski - Lakeville MN, US

Assignee:

Seagate Technology LLC - Cupertino CA

International Classification:

G11B 5/00

US Classification:

369 1324, 369 1334, 369 1332, 369 1333, 36011402, 36012336

Abstract:

A slider may have a first surface on an air bearing surface (ABS) and a laser recess formed in a second surface of the slider, opposite the first surface. A laser can then be positioned in the laser recess with the laser extending from the slider to a top plane. A stud may be formed adjacent to and separated from the laser on the second surface of the slider with the stud extending from the second surface of the slider to the top plane.

US Patent:

8576673, Nov 5, 2013

Filed:

Oct 25, 2011

Appl. No.:

13/280981

Inventors:

Mark Henry Ostrowski - Lakeville MN, US
Jie Zou - Eden Prairie MN, US
Amit Itagi - Eden Prairie MN, US
Kaizhong Gao - Eden Prairie MN, US

Assignee:

Seagate Technology LLC - Cupertino CA

International Classification:

G11B 11/00

US Classification:

369 1333, 36911227, 36012531

Abstract:

An apparatus includes a waveguide having a core layer, a near field transducer having an end positioned adjacent to a first surface, a first magnetic pole having an end positioned adjacent to the first surface, and a side lobe blocker adjacent to the first surface and having portions on opposite sides of the first magnetic pole and the near field transducer, wherein the side lobe blocker forms an aperture at an end of the core layer adjacent to the first surface.

US Patent:

8611193, Dec 17, 2013

Filed:

Oct 20, 2011

Appl. No.:

13/277483

Inventors:

Roger L. Hipwell - Eden Prairie MN, US
Yongjun Zhao - Eden Prairie MN, US
Mark Ostrowski - Lakeville MN, US
Andrew D. Habermas - Bloomington MN, US

Assignee:

Seagate Technology LLC - Cupertino CA

International Classification:

G11B 11/00

US Classification:

369 1326, 369 1332

Abstract:

A write head includes a cavity configured to couple a laser diode to the write head. A bottom of the cavity includes a heat conductive element configured to contact the laser diode, a plurality of thermal studs disposed below the heat conductive element, and a substrate disposed below the thermal studs. The heat conductive element, thermal studs, and substrate are thermally coupled to draw heat from the laser diode.