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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Guzik; Nahum
Address:
Palo Alto, CA
No. of patents:
32
Patents:












Patent Number Title Of Patent Date Issued
8169750 Removable nanopositioning cartridge for magnetic head and disk testers May 1, 2012
A removable cartridge for magnetic head and disk testers is disclosed. The removable cartridge includes: a base plate; a first end of an actuator rigidly fixed to the base plate; an HGA mounting block rigidly fixed to a second end of the actuator; a first end of a flexure rigidly cou
8077426 Magnetic disk centering method and system December 13, 2011
A system and method are described for aligning a data axis of one or more circular data-bearing tracks on an annular surface region of a magnetic media-bearing disk, with a spin axis of a spindle of a spinstand or a disk drive. The data axis is perpendicular to the surface region of the
7836605 Pneumatically controlled coupling assembly November 23, 2010
A headstack locator assembly for locating and fixing a headstack on a spinstand and which mitigates the aforementioned prior art limitations. The headstack locator assembly includes a headstack locator received on a fixed locator. The headstack locator connects to a headstack, while the
7836603 Headstack locator assembly for testing magnetic heads November 23, 2010
A headstack locator assembly for locating and fixing a headstack on a spinstand and which mitigates the aforementioned prior art limitations. The headstack locator assembly includes a headstack locator received on a fixed locator. The headstack locator connects to a headstack, while the
7830217 Method and system of vector signal generator with direct RF signal synthesis and parallel signal November 9, 2010
A vector signal generator with direct RF signal synthesis is disclosed. The vector signal generator comprises an RF signal synthesizer, a switch, and a memory. The RF signal synthesizer is configured for converting baseband IQ signals into a modulated digital RF signal. The RF signal
7705609 Phase frequency distortion measurement system April 27, 2010
Disclosed is a method of measuring frequency distortions characteristics of a device under test, the device configured convert an input signal in an input frequency range to an output signal in a different output frequency range. The method includes, for each test frequency f.sub.i,
7532006 Stand-alone quasi-static tester May 12, 2009
A quasi-static tester is disclosed. The quasi static tester comprises: a mount configured to fix a head gimbal assembly in a given position; a camera configured to observe the head gimbal assembly when the head gimbal assembly is fixed in the mount, wherein the camera is used to posi
7467479 Headstack locator assembly for testing magnetic heads December 23, 2008
A headstack locator assembly for locating and fixing a headstack on a spinstand and which mitigates the aforementioned prior art limitations. The headstack locator assembly includes a headstack locator received on a fixed locator. The headstack locator connects to a headstack, while the
7429857 Magnetic head and disk X-Y test assembly with optimized arrangement for skew angle September 30, 2008
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
7295002 Vacuum chuck spinstand for testing magnetic heads and disks November 13, 2007
A spinstand having a vacuum chuck clamping mechanism for securing magnetic discs includes a cap (9) and a base (10). A disk-to-be-clamped is held between the cap (9) and the base (10). Vacuum, applied through a port (4) in a mounting screw (12) of the base, provides the clamping force. T
7240777 Constrained layer damping assembly July 10, 2007
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
7141969 X-Y spinstand platform with flexure-coupled platen November 28, 2006
An XY platen positioning system includes a fixed base rigidly coupled to a essentially planar surface. An XY intermediate plate is slidably coupled to the fixed base, such that the XY intermediate plate is slidable in the X axis along the fixed base. An XY stage is slidably coupled to th
7061235 Magnetic head and disk X-Y test assembly with optimized arrangement for skew angle June 13, 2006
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
6785085 Multi-frequency servo bursts in magnetic disc memory system August 31, 2004
A servo burst pattern for use in positioning a read/write head with respect to tracks on a magnetic disc medium includes a first set of servo bursts adjacently disposed on the tracks along a first axis perpendicular to the centerlines. Each of the first set of bursts is disposed on an in
6772079 Method and apparatus for equalization of a signal acquisition system August 3, 2004
In a signal acquisition system in accordance with the principles of the present invention, a digital signal acquisition system includes a front end, an equalizer and an output system. The front end typically includes an input amplifier and may include one or more preamplifiers, and any o
6242910 Magnetic head and disk tester with yaw correction June 5, 2001
A magnetic head and disk tester includes a magnetic head which is selectively positioned relative to a rotatably mounted magnetic disk to accomplish testing of either of the head or disk or both. The magnetic head is secured to a carriage which is under electro-mechanical control, wh
6236201 Magnetic head and disk tester with pitch correction May 22, 2001
A magnetic head and disk tester provides accurate positioning of a magnetic read-write head over a magnetic disk by means of a coarse positioning mechanism and a fine positioning mechanism. The coarse positioning mechanism includes a stepper motor, a lead screw, a nut, rear sliders and
6229304 Apparatus for air flow stabilization in spinstands with a shroud assembly and a shell assembly May 8, 2001
A shroud of suitable shape is provided about the spindle and disk(s) of a spinstand. In some forms, a shell is disposed between the disk locus and the shroud. The shroud (and/or shell) operates to reduce or eliminate air flow at the top and bottom surfaces of the disk(s) and limits the a
6229303 Spinstand for testing magnetic heads and disks May 8, 2001
A shroud of suitable shape is provided about the spindle and disk(s) of a spinstand. The shroud operates to reduce or eliminate air flow at the top and bottom surfaces of the disk(s) and limits the air volume moved by the rotating disk(s). The shroud also directs the air in a circular pa
6219683 Radially distributed transverse filter April 17, 2001
A radially distributed transverse filter includes a plurality of delay lines of substantially equal electric length sequentially coupled at a like plurality of nodes. The nodes are distributed equidistant from a common position, for example positioned at vertices of a polygon. A plur
6212045 Method and apparatus for loading a magnetic head onto a magnetic disk April 3, 2001
A spinstand head-loading mechanism of a magnetic tester includes a protector bar and a lift arm which control the loading and unloading operations of a magnetic head, as part of a head-gimbal assembly, with respect to a magnetic disk. A series of actuators control the engagement and
6094047 Method and apparatus for balancing rotating components of a spinstand of a magnetic head and dis July 25, 2000
An apparatus for balancing the spinstand of a magnetic head and disk testing system includes a base that rotationally supports a rotating spindle. The spindle supports a pack of disks and a slide moveable along guide rails of the spinstand. The slide, in turn, supports a stack of mag
6064261 Write amplifier with improved switching performance, output common-mode voltage, and head curren May 16, 2000
A write amplifier is provided with one or more improved switching performance, low output common-mode voltage, and precise write head current control. A low output common-mode voltage is achieved using a combination of circuit components which limit the undesirable delivery of curren
6023145 Head and disk tester with a thermal drift-compensated closed-loop positioning system February 8, 2000
The head/disk tester of the invention has a housing 43 that houses spindle 44 that rotatingly supports a magnetic disk 31. The housing supports a moveable carriage 30 that, in turn, supports a magnetic head 32. Positioning means 39 and 41 are used to move the carriage and the magnetic
6006614 Apparatus and method for improving dynamic characteristics of a fine-positioning mechanism in a December 28, 1999
An improved fine positioning mechanism in a magnetic head/disk tester includes a primary position actuator and a primary body that supports a read/write head to be tested, and an auxiliary body and auxiliary actuator. Both actuators operate contemporaneously and in mutually opposite
5932887 Apparatus for measuring the flying height and orientation of a magnetic head relative to a trans August 3, 1999
The invention provides an apparatus for measuring the flying height and orientation of a magnetic head (54) relative to a transparent disk (20) based on both frustrated total internal reflection and total internal reflection. The apparatus comprises a housing (10) that mounts an electric
5872451 System for locating and fixing a headstack assembly on headstack tester February 16, 1999
A method and a system for fixing and positioning a headstack (100, 200, 300, 400) on a headstack tester by utilizing a vacuum chuck (105, 106, 208, 310). The vacuum chuck engages headstack. This engagement determines the exact position of the magnetic heads (24a, 24b . . . ) supported by
5825180 Magnetic disk test apparatus having heads moveable along substantially parallel axes October 20, 1998
An apparatus for testing and processing a magnetic disk. The apparatus comprises a spindle for rotatably supporting the disk about a spindle axis; a first read and/or write head; a second read and/or write head; a gliding head; and a burnishing head, where the heads are selectively p
5789756 Apparatus for measuring the flying height and orientation of a magnetic head relative to transpa August 4, 1998
The invention provides an apparatus for measuring the flying height and orientation of a magnetic head (54) relative to a transparent disk (20) based on frustrated total internal reflection. The apparatus comprises a housing (10) that mounts an electric motor (12) which rotationally
5677805 Apparatus for determining the dynamic position and orientation of a transducing head relative to October 14, 1997
An apparatus for determining the position and/or orientation of a transducing head positioned on one side of and close to a rotating transparent-core magnetic storage disk. Light is introduced into the disk to establish total internal reflection therein. A detector disposed on the ot
5382887 Method and apparatus for compensating positioning error in magnetic-head and magnetic-disk teste January 17, 1995
A magnetic head and disk tester which has linear encoders (40 and 42) installed on lateral sides of a carriage (30) which carries a magnetic head (34), movable in a radial direction along a hard disk. Positions of the magnetic head with respect to the hard disk are measured by means of
5254946 Magnetic head and disk tester with head centrally mounted on radially-moving, rotatable platform October 19, 1993
A positioning device includes a base platform (100) which bears linear slide mechanisms (102 and 104). Stationary shafts (106 and 108) of the slide mechanisms are rigidly attached to the base platform. Sliding bushings (110 and 112) are mounted into a movable housing (124) whose moti










 
 
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