Assignee
PHASE METRICS INC
US25 patents
Top patents by PatentIndex Score
US5875029AFeb 23, 1999
Apparatus and method for surface inspection by specular interferometric and diffuse light detection
PHASE METRICS INC115 citations94
US5793480AAug 11, 1998
Combined interferometer/ellipsometer for measuring small spacings
PHASE METRICS INC81 citations94
US5957588ASep 28, 1999
Air bearing for a spindle
PHASE METRICS INC19 citations92
US5661559AAug 26, 1997
Optical surface detection for magnetic disks
PHASE METRICS INC31 citations92
US6088092AJul 11, 2000
Glass substrate inspection apparatus
PHASE METRICS INC54 citations91
US5894374AApr 13, 1999
Method and apparatus for providing a clock assembly
PHASE METRICS INC19 citations91
US5781649AJul 14, 1998
Surface inspection of a disk by diffraction pattern sampling
PHASE METRICS INC39 citations91
US5658191AAug 19, 1997
Burnish head for magnetic media
PHASE METRICS INC33 citations91
US6140661AOct 31, 2000
Loader with a matching finger that loads a head gimbal assembly onto a disk
PHASE METRICS INC33 citations88
US5818592AOct 6, 1998
Non-contact optical glide tester
PHASE METRICS INC46 citations88
US5903085AMay 11, 1999
Piezoelectric nanopositioner
PHASE METRICS INC60 citations85
US5841318ANov 24, 1998
Low noise preamplifier for a magneto-resistive head tester
PHASE METRICS INC24 citations84
US5673110ASep 30, 1997
Multiplexed laser interferometer for non-dispersed spectrum detection in a dynamic flying height tester
PHASE METRICS INC28 citations82
US5986451ANov 16, 1999
Low z-height loader for a head gimbal assembly
PHASE METRICS INC25 citations80
US5821746AOct 13, 1998
Apparatus for testing multiple magnetic recording heads
PHASE METRICS INC20 citations80
US5872664AFeb 16, 1999
Distortion of an isolated pulse
PHASE METRICS INC9 citations73
US5838153ANov 17, 1998
Magnetic media tester which includes a filter that filters the product of a read signal and an output of a phase lock loop circuit
PHASE METRICS INC13 citations73
US5838510ANov 17, 1998
Method and apparatus for the measurement of defects in magnetic recording disks using a logarithmic amplifier
PHASE METRICS INC10 citations73
US5805284ASep 8, 1998
Optically verified glide
PHASE METRICS INC12 citations72
US6184992B1Feb 6, 2001
Apparatus and method for measuring flying height and a real index of refraction
PHASE METRICS INC8 citations71
US5808736ASep 15, 1998
Thin film flying height calibration disk for calibrating flying height testers
PHASE METRICS INC7 citations71
US5893699AApr 13, 1999
End effector for a robotic arm of a disk certifier
PHASE METRICS INC7 citations70
US6184993B1Feb 6, 2001
Apparatus for measuring a small gap using a Savart plate
PHASE METRICS INC5 citations60
US5927934AJul 27, 1999
End effector for a robotic arm of a disk certifier
PHASE METRICS INC4 citations59
US5845401ADec 8, 1998
Crash tolerant air bearing spindle
PHASE METRICS INC4 citations56