Inventor
YARMCHUK EDWARD J
US34 patents
⚠️ This page may combine multiple inventors who share the name “YARMCHUK EDWARD J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IBM
27 patentsUS5612833AMar 18, 1997
Radial self-propagation pattern generation for disk file servowriting
IBM100 citations98
US4931887AJun 5, 1990
Capacitive measurement and control of the fly height of a recording slider
IBM92 citations96
US5615058AMar 25, 1997
Method and system for writing a servo-pattern on a storage medium
IBM77 citations95
US5581420ADec 3, 1996
Method and system for determining a radial positioning valve used for writing tracks at a desired track pitch
IBM69 citations95
US5485322AJan 16, 1996
Method and system for writing a clock track on a storage medium
IBM67 citations95
US6242923B1Jun 5, 2001
Method for detecting power plane-to-power plane shorts and I/O net-to power plane shorts in modules and printed circuit boards
IBM37 citations92
US6141093AOct 31, 2000
Method and apparatus for locating power plane shorts using polarized light microscopy
IBM31 citations92
US5821759AOct 13, 1998
Method and apparatus for detecting shorts in a multi-layer electronic package
IBM44 citations92
US5434504AJul 18, 1995
Position sensors for linear motors including plural symmetrical fluxes generated by a planar drive coil and received by planar sense coils being colinear along an axis of motion
IBM89 citations92
US8026730B2Sep 27, 2011
Process for measuring heat spreader tilt
IBM10 citations84
US7764069B2Jul 27, 2010
Process for measuring bond-line thickness
IBM14 citations84
US4623554ANov 18, 1986
Method for controlling plating rate in an electroless plating system
IBM20 citations82
US9786572B1Oct 10, 2017
Flip chip ball grid array with low impedance and grounded lid
IBM11 citations77
US5469051ANov 21, 1995
Electrical defect detector for circuit lines
IBM11 citations74
US4939599AJul 3, 1990
Method and apparatus for measuring dynamic track misregistration
IBM17 citations74
US10338024B2Jul 2, 2019
Using in situ capacitance measurements to monitor the stability of interface materials in complex PCB assemblies and other structures
IBM1 citations73
US5130660AJul 14, 1992
Miniature electronic device aligner using capacitance techniques
IBM15 citations73
US4479980AOct 30, 1984
Plating rate monitor
IBM19 citations73
US10908110B2Feb 2, 2021
Using in situ capacitance measurements to monitor the stability of interface materials in complex PCB assemblies and other structures
IBM0 citations63
US9714911B2Jul 25, 2017
Using in situ capacitance measurements to monitor the stability of interface materials in complex PCB assemblies and other structures
IBM1 citations63
US4525724AJun 25, 1985
Magnetic recording head array for longitudinal magnetic printing with staggered head arrangement and clustered wiring
IBM3 citations63
US4739342AApr 19, 1988
Crossed-element magnetographic print head
IBM5 citations62
US11224927B2Jan 18, 2022
Circuit card attachment for enhanced robustness of thermal performance
IBM0 citations51
US10141236B2Nov 27, 2018
Flip chip ball grid array with low impedence and grounded lid
IBM0 citations48
US10043725B2Aug 7, 2018
Flip chip ball grid array with low impedence and grounded lid
IBM0 citations48
US7808257B2Oct 5, 2010
Ionization test for electrical verification
IBM0 citations46
US4725850AFeb 16, 1988
Electromagnetic head with separate addressability resolution and imaging resolution functions
IBM0 citations41
HITACHI GLOBAL STORAGE TECH
5 patentsUS6633451B1Oct 14, 2003
Self-servo-writing timing pattern generation with non-overlapping read and write elements
HITACHI GLOBAL STORAGE TECH62 citations96
US6735031B2May 11, 2004
Method for storage of self-servowriting timing information
HITACHI GLOBAL STORAGE TECH30 citations93
US6611395B1Aug 26, 2003
Rotating media recording system with adaptive track density
HITACHI GLOBAL STORAGE TECH29 citations93
US7136243B2Nov 14, 2006
Method and apparatus for correcting for systematic errors in timing pattern generation
HITACHI GLOBAL STORAGE TECH5 citations73
US6654196B2Nov 25, 2003
Avoiding write to read interference during self-servowriting
HITACHI GLOBAL STORAGE TECH4 citations63