Inventor · disambiguated record
Hemantha K. Wickramasinghe
Also filed as: WICKRAMASINGHE HEMANTHA · WICKRAMASINGHE HEMANTHA K · WICKRAMASINGHE HEMANTHA KUMAR
79 granted patents·1 pending application·2,611 citations·filing 1980–2018
99Inventor score
Top patents by PatentIndex Score
80 records- 0198US6493183B1Thermally-assisted magnetic recording system with head having resistive heater in write gapIBM·Filed 2000·Granted Dec 10, 2002·130 cites·12 claims
- 0298US5602820AMethod and apparatus for mass data storageIBM·Filed 1995·Granted Feb 11, 1997·181 cites·15 claims
- 0398US5527110AMethod and apparatus for detecting asperities on magnetic disks using thermal proximity imagingIBM·Filed 1993·Granted Jun 18, 1996·111 cites·20 claims
- 0496US7262936B2Heating device and magnetic recording head for thermally-assisted recordingHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Aug 28, 2007·68 cites·23 claims
- 0596US7133254B2Magnetic recording head with heating deviceHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Nov 7, 2006·63 cites·40 claims
- 0695US7488967B2Structure for confining the switching current in phase memory (PCM) cellsIBM·Filed 2005·Granted Feb 10, 2009·40 cites·6 claims
- 0793US6771445B1Assembly and method suitable for thermo-magnetic writing/reading of dataHITACHI GLOBAL STORAGE TECH·Filed 2000·Granted Aug 3, 2004·39 cites·33 claims
- 0893US6597639B1Assembly suitable for writing high density data on a ferroelectric mediaIBM·Filed 2000·Granted Jul 22, 2003·41 cites·24 claims
- 0993US6433310B1Assembly suitable for reading/writing/erasing information on a media based on thermal couplingIBM·Filed 2001·Granted Aug 13, 2002·37 cites·8 claims
- 1093US6334807B1Chemical mechanical polishing in-situ end point systemIBM·Filed 1999·Granted Jan 1, 2002·113 cites·27 claims
- 1193US6088176AMethod and apparatus for separating magnetic and thermal components from an MR read signalIBM·Filed 1996·Granted Jul 11, 2000·84 cites·77 claims
- 1293US5298975ACombined scanning force microscope and optical metrology toolIBM·Filed 1991·Granted Mar 29, 1994·130 cites·29 claims
- 1392US6671127B2Magnetic recording system with single coil for thermally assisted writingIBM·Filed 2001·Granted Dec 30, 2003·33 cites·14 claims
- 1491US6773764B2Method of forming a patterned magnetic recording mediumHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Aug 10, 2004·21 cites·14 claims
- 1591US5003815AAtomic photo-absorption force microscopeIBM·Filed 1989·Granted Apr 2, 1991·74 cites·16 claims
- 1690US7385234B2Memory and logic devices using electronically scannable multiplexing devicesIBM·Filed 2005·Granted Jun 10, 2008·18 cites·18 claims
- 1790US7352029B2Electronically scannable multiplexing deviceIBM·Filed 2005·Granted Apr 1, 2008·12 cites·29 claims
- 1890US7009694B2Indirect switching and sensing of phase change memory cellsIBM·Filed 2004·Granted Mar 7, 2006·40 cites·57 claims
- 1990US5065103AScanning capacitance - voltage microscopyIBM·Filed 1990·Granted Nov 12, 1991·93 cites·19 claims
- 2090US4947034AApertureless near field optical microscopeIBM·Filed 1989·Granted Aug 7, 1990·71 cites·25 claims
- 2189US6656693B2Self assembled nano-devices using DNAIBM·Filed 2001·Granted Dec 2, 2003·20 cites·40 claims
- 2288US6702186B1Assembly comprising a plurality of media probes for writing/reading high density magnetic dataHITACHI GLOBAL STORAGE TECH·Filed 2000·Granted Mar 9, 2004·25 cites·21 claims
- 2388US6052249AMethod and apparatus for data storage using thermal proximity imagingIBM·Filed 1998·Granted Apr 18, 2000·40 cites·22 claims
- 2487US6233206B1High density magnetic thermal recording and reproducing assemblyIBM·Filed 1999·Granted May 15, 2001·90 cites·19 claims
- 2587US4941753AAbsorption microscopy and/or spectroscopy with scanning tunneling microscopy controlIBM·Filed 1989·Granted Jul 17, 1990·59 cites·22 claims
- 2686US5283442ASurface profiling using scanning force microscopyIBM·Filed 1993·Granted Feb 1, 1994·79 cites·42 claims
- 2785US5640242AAssembly and method for making in process thin film thickness measurmentsIBM·Filed 1996·Granted Jun 17, 1997·72 cites·10 claims
- 2885US4992659ANear-field lorentz force microscopyIBM·Filed 1989·Granted Feb 12, 1991·47 cites·50 claims
- 2984US6319093B1Chemical-mechanical polishing system and method for integrated spin dry-film thickness measurementIBM·Filed 2001·Granted Nov 20, 2001·32 cites·26 claims
- 3083US5392118AMethod for measuring a trench depth parameter of a materialIBM·Filed 1993·Granted Feb 21, 1995·44 cites·5 claims
- 3183US5347854ATwo dimensional profiling with a contact force atomic force microscopeIBM·Filed 1992·Granted Sep 20, 1994·56 cites·5 claims
- 3281US7009813B2Apparatus and method of configuring the air bearing surfaces of sliders in disk drives for producing high temperatures in thermally-assisted recordingsHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Mar 7, 2006·14 cites·14 claims
- 3381US6982843B2Assembly comprising adjustable heat flux mechanism for thermally assisted/thermal information processing and controlHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Jan 3, 2006·14 cites·20 claims
- 3481US4741620AIrradiative probe systemNAT RES DEV·Filed 1986·Granted May 3, 1988·39 cites·14 claims
- 3580US5382795AUltrafine silicon tips for AFM/STM profilometryIBM·Filed 1994·Granted Jan 17, 1995·41 cites·13 claims
- 3679US7795044B2Electronically scannable multiplexing deviceIBM·Filed 2008·Granted Sep 14, 2010·4 cites·5 claims
- 3779US5538898AMethod suitable for identifying a code sequence of a biomoleculeIBM·Filed 1995·Granted Jul 23, 1996·59 cites·43 claims
- 3879US5242541AMethod of producing ultrafine silicon tips for the afm/stm profilometryIBM·Filed 1990·Granted Sep 7, 1993·39 cites·21 claims
- 3978US10280392B2Methods and devices for non-thermal polymerase chain reactionUNIV CALIFORNIA·Filed 2016·Granted May 7, 2019·1 cites·13 claims
- 4077US8552414B2Electronically scannable multiplexing deviceWICKRAMASINGHE HEMANTHA KUMAR·Filed 2012·Granted Oct 8, 2013·3 cites·7 claims
- 4177US6757235B2Assembly suitable for reading data based on thermal couplingIBM·Filed 2001·Granted Jun 29, 2004·11 cites·12 claims
- 4276US7682866B2Non-planarized, self-aligned, non-volatile phase-change memory array and method of formationIBM·Filed 2006·Granted Mar 23, 2010·4 cites·20 claims
- 4376US5280341AFeedback controlled differential fiber interferometerIBM·Filed 1992·Granted Jan 18, 1994·36 cites·9 claims
- 4476US5263776AMulti-wavelength optical thermometryIBM·Filed 1992·Granted Nov 23, 1993·40 cites·10 claims
- 4575US7130379B2Device and method for generating an x-ray point source by geometric confinementIBM·Filed 2003·Granted Oct 31, 2006·8 cites·2 claims
- 4675US6510120B2Method for writing and/or erasing high density data on a mediaIBM·Filed 2001·Granted Jan 21, 2003·10 cites·15 claims
- 4773US5850374AMethod and apparatus for data storage using thermal proximity imagingIBM·Filed 1996·Granted Dec 15, 1998·19 cites·4 claims
- 4870US7879728B2Sub-lithographic printing methodIBM·Filed 2008·Granted Feb 1, 2011·3 cites·10 claims
- 4970US6579149B2Support and alignment device for enabling chemical mechanical polishing rinse and film measurementsIBM·Filed 2001·Granted Jun 17, 2003·13 cites·20 claims
- 5070US5691540AAssembly for measuring a trench depth parameter of a workpieceIBM·Filed 1996·Granted Nov 25, 1997·32 cites·6 claims
Showing the top 50 of 80 patent records by PatentIndex Score.
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