Michael St Dennis

US Patent:

20040130320, Jul 8, 2004

Filed:

Sep 18, 2003

Appl. No.:

10/665167

Inventors:

Nahum Guzik - Palo Alto CA, US
Michael Dennis - San Jose CA, US

International Classification:

G01R033/12

US Classification:

324/210000, 324/212000

Abstract:

A magnetic head and disk tester comprises a base, a spindle for rotationally supporting a magnetic disk, a carriage for supporting a magnetic head support which carries a magnetic head with a magnetic read/write element, and a dual-stage positioning system that moves the carriage in two perpendicular directions X and Y. The magnetic head support, the magnetic head and the magnetic read/write element have a common longitudinal axis Z. The head support is positioned such that the longitudinal axis Z forms a predetermined angle between 0 and 90 with respect to the Y direction. Preferably the predetermined angle is about 45 degrees. When the head is driven from one point of an inner track to a point of an outer track, the displacement of the head along X axis is relatively large and the displacement of the head along Y axis is relatively small.

US Patent:

20060033249, Feb 16, 2006

Filed:

Aug 16, 2004

Appl. No.:

10/919133

Inventors:

Nahum Guzik - Palo Alto CA, US
Michael St. Dennis - Fallbrook CA, US

International Classification:

F16F 15/00

US Classification:

267140150, 188378000

Abstract:

A constrained layer damping assembly for a rigid base member having a substantially planar surface comprises a gas impervious damping layer disposed on the substantially planar surface of the base member, and a load element disposed on the damping layer. The damping layer defines at least one void region extending between the planar surface and the load element, and the load element defines at least one channel for coupling a low pressure to the void region relative to the pressure external to the constrained layer damping assembly to establish a pressure differential between the inside of the void region and the outside of the constrained layer damping assembly. The pressure differential keeps the damping layer under compression and secures the load element and the damping layer onto the base member.