Assignee
PHASE METRICS
US30 patents
Top patents by PatentIndex Score
US5777740AJul 7, 1998
Combined interferometer/polarimeter
PHASE METRICS83 citations95
US5883714AMar 16, 1999
Method and apparatus for detecting defects on a disk using interferometric analysis on reflected light
PHASE METRICS81 citations94
US5719840AFeb 17, 1998
Optical sensor with an elliptical illumination spot
PHASE METRICS39 citations92
US5696445ADec 9, 1997
Method and apparatus for testing the resistive properties of magneto resistive materials using a time variable magnetic field
PHASE METRICS40 citations92
US5517111AMay 14, 1996
Automatic testing system for magnetoresistive heads
PHASE METRICS73 citations92
US5280340AJan 18, 1994
Method and apparatus to calibrate intensity and determine fringe order for interferometric measurement of small spacings
PHASE METRICS63 citations92
US5801464ASep 1, 1998
Pressurized air-ionization ground for an air bearing spindle
PHASE METRICS22 citations91
US5696653ADec 9, 1997
Tooling for holding a head gimbal assembly
PHASE METRICS19 citations91
US5792947AAug 11, 1998
Method and apparatus for combined glide and defect analysis
PHASE METRICS40 citations90
US5781299AJul 14, 1998
Determining the complex refractive index phase offset in interferometric flying height testing
PHASE METRICS21 citations90
US5771130AJun 23, 1998
Method and apparatus for non-contact servo writing
PHASE METRICS31 citations90
US5644564AJul 1, 1997
Vacuum chuck for rotating data discs
PHASE METRICS32 citations90
US5457534AOct 10, 1995
Method and apparatus to calibrate intensity and determine fringe order for interferometric measurement of small spacings
PHASE METRICS28 citations90
US5486924AJan 23, 1996
Method and apparatus for measurement of roughness and hardness of a surface
PHASE METRICS32 citations89
US5706080AJan 6, 1998
Single test station that can test a flying height and electrical characteristics of a recording head
PHASE METRICS28 citations87
US5668470ASep 16, 1997
Automatic testing system for magnetoresistive heads
PHASE METRICS70 citations86
US5675082AOct 7, 1997
Goniometer loader for testing the height of a disk drive head gimbal assembly
PHASE METRICS26 citations82
US5786677AJul 28, 1998
Stops and a clutch for a loader that test the flying height of a disk drive head gimbal assembly
PHASE METRICS34 citations81
US5692840ADec 2, 1997
Crash tolerant air bearing spindle
PHASE METRICS16 citations75
US5696585ADec 9, 1997
Apparatus and method for efficient electrostatic discharge on glass disks in flying height testers
PHASE METRICS8 citations73
US5638178AJun 10, 1997
Imaging polarimeter detector for measurement of small spacings
PHASE METRICS12 citations72
US5783882AJul 21, 1998
Conductive contact for an air bearing spindle
PHASE METRICS14 citations71
US5771139AJun 23, 1998
Integrated spring head/gimbal assembly holder
PHASE METRICS11 citations70
US5671048ASep 23, 1997
Method and apparatus for rotary load/unload slider positioning
PHASE METRICS8 citations70
US5767964AJun 16, 1998
Slider for calibration and correlation of flying height testers
PHASE METRICS7 citations69
US5689329ANov 18, 1997
Flying height altitude simulator
PHASE METRICS6 citations63
US5699204ADec 16, 1997
Method and apparatus for the coherent demodulation of an amplified modulated carrier using a dual track and hold amplifier and the application of said method and apparatus to measurement of magnetic media performance
PHASE METRICS3 citations62
US5818658AOct 6, 1998
Variable pneumatic loader for testing a disk drive head gimbal assembly
PHASE METRICS9 citations61
US5760989AJun 2, 1998
Method and apparatus for captive clock head assembly
PHASE METRICS13 citations59
US5764545AJun 9, 1998
Disk drive test sequence editor
PHASE METRICS9 citations58