Jeffrey S Lille

6578816, Jun 17, 2003

Apr 14, 2000

09/549259

Jeffrey S. Lille - San Jose CA

International Business Machines Corporation - Armonk NY

F16K 3100

251 11, 25112901

An active micromechanical air valve for pressure control in a disk drive and method for making the same is disclosed. A first layer having a first thermal coefficient of expansion and a second layer having a second thermal coefficient of expansion are formed. The first layer and the second layer are configured to form a membrane. The first and second layer engage in a closed state to prevent air flow there between in a first thermal state and open to allow air flow there between in a second thermal state.

6579612, Jun 17, 2003

Jun 24, 1999

09/344004

Jeffrey S. Lille - San Jose CA

International Business Machines Corporation - Armonk NY

G11B 566

428332, 428336, 428692, 428694 R, 428694 T, 428694 TS, 428694 TM, 428900, 338 32 R, 324209, 324235, 324262, 73776, 73779

A sensor for measuring magnetostriction of and/or magnetic thin film is constructed by depositing a thin film nonferromagnetic electrically insulating layer followed by a thin film layer of a sensor material which is piezoresistive and nonferromagnetic. The insulating and the piezoresistive film can be etched into an appropriate pattern and orientation to provide sensitivity to strain in the magnetic film. The magnetostrictive strain in the magnetic film is induced by a known magnetic field which produces a corresponding strain in the piezoresistive film which can be measured as a change in the electrical resistance which can be detected by external probes or other measuring means. The measurement of the magnetostriction can be performed as a part of the manufacturing process for wafers with a plurality of thin film magnetic heads thereon and does not require that the wafers be removed to a laboratory.

6587314, Jul 1, 2003

May 16, 2000

09/572025

Jeffrey S. Lille - San Jose CA

International Business Machines Corporation - Armonk NY

G11B 539

360313, 3602344, 3602347, 3602351

An enhanced silicon and ceramic magnetoresistive read/write head and method for making the same is disclosed. The present invention provides reliable chemical mechanical polish etch stop by etching deep trenches into the silicon at the surrounding edges of the magnetic write and read device and filling it with a refractory metal (e. g. tungsten) so that the silicon wafer thickness will not significantly add to the length of the ABS nor to the gram load of the slider. An imbedded deformable pad will allow these bonded heads to have a high average fly height and reduce to near contact recording when reading and writing through an applied potential across a deformable pad in the silicon. The epoxy bond of the silicon to the ceramic slider consists of polymethyl methracrylate (PMMA) which can be spun on a wafer or a row of wafers with nanometer thickness repeatability and using low temperatures, i. e. , 200° C.

6680832, Jan 20, 2004

May 11, 2001

09/853352

Kuok San Ho - Cupertino CA
Jordan A. Katine - San Jose CA
Jeffrey S. Lille - Sunnyvale CA
Ching H. Tsang - Sunnyvale CA

International Business Machines Corporation - Armonk NY

G11B 539

3603242, 360319

A current-perpendicular-to-the-plane (CPP) magnetoresistive sensor or read head has a magnetic shield geometry that covers the side walls of the sensor structure to prevent side reading caused by magnetic flux entering from adjacent data tracks. The shield geometry includes a bottom shield with a substantially planar surface and a specially shaped top shield. The top shield has substantially vertical portions generally parallel to the side walls of the sensor structure, a horizontal top portion over the trackwidth region of the sensor, and horizontal side portions formed over the portions of the bottom shield on either side of the sensor structure. The insulating gap material that separates the bottom and top shields is in contact with the horizontal portions of the bottom shield and the side walls of the sensor structure.

6683753, Jan 27, 2004

Aug 20, 1999

09/378059

Jeffrey S. Lille - San Jose CA

International Business Machines Corporation - Armonk NY

G11B 560

3602351, 3602353

Embodiments include a slider having a silicon body and at least one carbide pad structure embedded therein. At least one head structure for reading and/or writing data is located on the silicon body. The silicon body includes an air bearing surface on which the head is located. The air bearing surface also includes at least a portion of the carbide pad structure thereon. In one aspect, the metal carbide structure may be made from a material such as titanium carbide, zirconium carbide, vanadium carbide, tungsten carbide, or molybdenum carbide. In another aspect, the head may be located on the air bearing surface between carbide pad structures.

6696226, Feb 24, 2004

Nov 8, 2002

10/290747

Thomas Edward Dinan - San Jose CA
Jeffrey S. Lille - Sunnyvale CA
Hugo Alberto Emilio Santini - San Jose CA

International Business Machines Corporation - Armonk NY

G11B 5147

430320, 430314, 430319, 2960307, 2960325

A method of making a magnetic read/write head using a single lithographic step to define both a write coil and a pole tip structure. The use of a thin image resist layer over a hard reactive-ion etch mask and image transfer techniques allows very high resolution optical lithography which can accommodate formation of a very compact coil and pole structure. The use of a single high resolution lithography step on a planarized structure to define both a write pole tip and a write coil coplanar with the write pole tip avoids the problems of reflective notching associated with lithography to define the pole tip in the vicinity of non-planar features of the coil structure and also eliminates alignment inaccuracies inherent in separate lithography processes for the coil and pole.

6725526, Apr 27, 2004

Jan 14, 2002

10/047229

Jeffrey S. Lille - Sunnyvale CA

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

G11B 5127

296031, 29428, 2960307, 2960312, 2960316, 29851, 216 22, 216 39, 216 41, 264434, 3602345, 3602358, 438 3

Embodiments include a method for forming a head suspension assembly. A spacer layer is formed in or on a silicon wafer. A transfer film including an opening defining the shape of a slider support membrane is provided, and the opening is filled with a resin material. The transfer film with the resin material therein is positioned over the silicon wafer so that at least a portion of the resin material is positioned adjacent to the spacer layer. The resin material is baked to form a glassy carbon material. The spacer layer is etched to form a trench in the silicon wafer adjacent to the glassy carbon material, and a slider is positioned on the glassy carbon material over the trench.

6775103, Aug 10, 2004

Apr 2, 2001

09/824351

Jeffrey S. Lille - Sunnyvale CA

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

G11B 560

3602365, 3602353

A slider head assembly is provided which includes a slider head for reading/writing data on the surface of a rotating disc. The slider head is disposed in spaced relationship with respect to the disc for read/write (R/W) operations. The slider head assembly is comprised of a body portion having an essentially planar surface positioned to co-act with the surface of the disc with a proximal end and a distal end. The proximal end or trailing slider surface of the head assembly has a read/write element thereat. The distal end or leading slider surface of the assembly has an actuation device mounted thereon, having a surface the position of which can be modified by an external signal to change the position of the head with respect to the planar or air bearing surface (ABS) of the head assembly. This will change the characteristics of the boundary layer of air between the rotating disc and the head, causing the head assembly to move closer to or farther from the rotating disc when actuated by the external signal. A preferred embodiment is a patterned heating element which selectively heats the edge of the leading surface of the slider to cause position modification of the device.