Prakash Mani

US Patent:

20120216378, Aug 30, 2012

Filed:

Apr 30, 2012

Appl. No.:

13/460190

Inventors:

Nathan C. Emley - San Francisco CA, US
Donghong Li - Pleasanton CA, US
Prakash Mani - Fremont CA, US

Assignee:

WESTER DIGITAL (FREMONT), LLC - Fremont CA

International Classification:

H01L 41/22

US Classification:

29 2535

Abstract:

A method and system for fabricating a piezoelectric multilayer are described. The method and system include providing conductive layers. Alternating conductive layers are electrically connected. A first plurality of alternating conductive layers is electrically isolated from a second plurality of alternating conductive layers. Piezoelectric layers are interleaved with the conductive layers. Apertures are provided in the piezoelectric layers. A first conductive plug electrically connects the first plurality of alternating conductive layers, includes a first plurality of segments, and is in apertures in the piezoelectric layers. Each of the first plurality of segments extends through one of the piezoelectric layers. A second conductive plug electrically connects the second plurality of alternating conductive layers, includes a second plurality of segments, and is in a second portion of the plurality of apertures. Each of the second plurality of segments extends through one of the plurality of piezoelectric layers.

US Patent:

8227023, Jul 24, 2012

Filed:

May 27, 2009

Appl. No.:

12/472965

Inventors:

Feng Liu - San Ramon CA, US
Prakash Mani - Fremont CA, US
Christian Kaiser - San Jose CA, US
Laurence L. Chen - Fremont CA, US

Assignee:

Western Digital (Fremont), LLC - Fremont CA

International Classification:

G11B 5/127

US Classification:

427127, 3603241

Abstract:

A method and system for providing a magnetic transducer are disclosed. The method and system include providing a magnetic element including a free layer, a nonmagnetic spacer layer, a pinned layer, and a pinning layer adjacent to the pinned layer. The free layer is to be biased in a first direction. The pinning layer biases the pinned layer magnetization in a second direction. The pinning layer is oriented along the second direction. A hard bias structure is adjacent to the magnetic element. The hard bias structure magnetization is initialized such that it has a nonzero component along the second direction. The method and system also include performing thermal treatment(s) after initializing the hard bias magnetization. The thermal treatment(s) are above room temperature. The method and system further include resetting the hard bias magnetization substantially along the first direction after the thermal process(es) are performed.