Inventor · disambiguated record
Stefan Maat
Also filed as: MAAT STEFAN
86 granted patents·21 pending applications·1,271 citations·filing 2001–2024
99Inventor score
Files withHITACHI GLOBAL STORAGE TECH51HGST Netherlands BV15YAZAKI CORP14HITACHI GLOBAL STORAGE TECH NL6CAREY MATTHEW J4
Top patents by PatentIndex Score
107 records- 0197US7791844B2Magnetoresistive sensor having a magnetically stable free layer with a positive magnetostrictionHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted Sep 7, 2010·49 cites·18 claims
- 0296US9042059B1Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor structure with multiple stacked sensors and improved center shieldHGST Netherlands BV·Filed 2014·Granted May 26, 2015·46 cites·14 claims
- 0396US8873204B1Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor structure with multiple stacked sensors and center shield with CoFeB insertion layerHGST Netherlands BV·Filed 2014·Granted Oct 28, 2014·44 cites·15 claims
- 0496US8576518B1Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor with exchange-coupled side shield structureHGST Netherlands BV·Filed 2012·Granted Nov 5, 2013·54 cites·19 claims
- 0596US8085490B2Slider fly-height control in a hard disk driveFRANCA-NETO LUIZ M·Filed 2009·Granted Dec 27, 2011·30 cites·34 claims
- 0696US7298597B2Magnetoresistive sensor based on spin accumulation effect with free layer stabilized by in-stack orthogonal magnetic couplingHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Nov 20, 2007·35 cites·22 claims
- 0796US6653704B1Magnetic memory with tunnel junction memory cells and phase transition material for controlling current to the cellsIBM·Filed 2002·Granted Nov 25, 2003·97 cites·11 claims
- 0895US8749926B1Scissor magnetic read head with wrap-around magnetic shieldHGST Netherlands BV·Filed 2012·Granted Jun 10, 2014·36 cites·23 claims
- 0995US8638530B1Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor having a top shield with an antiparallel structureHGST Netherlands BV·Filed 2013·Granted Jan 28, 2014·42 cites·18 claims
- 1095US7551409B2Current-perpendicular-to-the-plane (CPP) magnetoresistive sensor with improved ferromagnetic free layer structureHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jun 23, 2009·22 cites·21 claims
- 1195US6834026B2Method for thermally-assisted recording on a magnetic recording diskIBM·Filed 2003·Granted Dec 21, 2004·67 cites·4 claims
- 1295US6650513B2Magnetic devices with a ferromagnetic layer having perpendicular magnetic anisotropy and an antiferromagnetic layer for perpendicularly exchange biasing the ferromagnetic layerIBM·Filed 2001·Granted Nov 18, 2003·72 cites·1 claims
- 1394US8780506B1Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor with side shields and an antiparallel structure top shieldHGST Netherlands BV·Filed 2013·Granted Jul 15, 2014·28 cites·22 claims
- 1493US8416539B2Magnetic field sensing system using spin-torque diode effectCAREY MATTHEW J·Filed 2008·Granted Apr 9, 2013·18 cites·14 claims
- 1593US8218270B1Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor with improved hard magnet biasing structureZELTSER ALEXANDER M·Filed 2011·Granted Jul 10, 2012·17 cites·21 claims
- 1693US8208228B2Current-perpendicular-to-the-plane (CPP) magnetoresistive read head with multiple sensing elements for patterned-mediaMAAT STEFAN·Filed 2009·Granted Jun 26, 2012·34 cites·17 claims
- 1793US7382573B2Magnetic write head having a magnetically anisotropic write poleHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jun 3, 2008·11 cites·14 claims
- 1893US7363699B2Method for manufacturing a magnetic read sensor employing oblique etched underlayers for inducing uniaxial magnetic anisotropy in hard magnetic bias layersHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Apr 29, 2008·14 cites·17 claims
- 1992US7382586B2Magnetic read sensor employing oblique etched underlayers for inducing uniaxial magnetic anisotropy in a self biased free layerHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jun 3, 2008·22 cites·41 claims
- 2091US10840032B1Supercapacitor cell with high-purity binder-free carbonaceous electrodeYAZAKI CORP·Filed 2020·Granted Nov 17, 2020·4 cites·33 claims
- 2191US8861137B1Perpendicular magnetic recording write head with main pole formed on a metallic amorphous underlayerHGST Netherlands BV·Filed 2013·Granted Oct 14, 2014·15 cites·12 claims
- 2291US8233247B2Scissoring-type current-perpendicular-to-the-plane giant magnetoresistance (CPP-GMR) sensors with damped free layer structuresCAREY MATTHEW J·Filed 2008·Granted Jul 31, 2012·14 cites·14 claims
- 2390US8015694B2Method for making a scissoring-type current-perpendicular-to-the-plane (CPP) magnetoresistive sensorHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Sep 13, 2011·22 cites·4 claims
- 2490US7502206B2Multiple extraordinary magnetoresistive (EMR) sensor utilizing both current leadsHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Mar 10, 2009·10 cites·23 claims
- 2590US7466515B2Magnetic medium having a soft underlayer with a magnetic anisotropyHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Dec 16, 2008·6 cites·8 claims
- 2690US7372116B2Heat assisted switching in an MRAM cell utilizing the antiferromagnetic to ferromagnetic transition in FeRhHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted May 13, 2008·59 cites·28 claims
- 2789US10981794B1Stable aqueous dispersion of carbonYAZAKI CORP·Filed 2020·Granted Apr 20, 2021·3 cites·12 claims
- 2889US9570100B1Two-dimensional magnetic recording device with center shield stabilized by recessed AFM layerHGST Netherlands BV·Filed 2015·Granted Feb 14, 2017·10 cites·21 claims
- 2989US7360299B2Method for manufacturing a magnetic read sensor employing oblique etched underlayers for inducing uniaxial magnetic anisotropy in a hard magnetic in-stack bias layerHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Apr 22, 2008·8 cites·17 claims
- 3088US8670218B1Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor with hard magnet biasing structure having a MgO insulating layerHGST Netherlands BV·Filed 2012·Granted Mar 11, 2014·9 cites·19 claims
- 3188US8320078B1Perpendicular magnetic recording write head with antiparallel-coupled laminated main pole having a tapered trailing edgeZELTSER ALEXANDER M·Filed 2012·Granted Nov 27, 2012·11 cites·20 claims
- 3288US7360300B2Method for manufacturing a magnetic read sensor employing oblique etched underlayers for inducing uniaxial magnetic anisotropy in a hard magnetic pinning layerHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Apr 22, 2008·8 cites·18 claims
- 3386US7423847B2Current-perpendicular-to-the-plane spin-valve (CPP-SV) sensor with current-confining apertures concentrated near the sensing edgeHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Sep 9, 2008·7 cites·20 claims
- 3486US6836392B2Stability-enhancing underlayer for exchange-coupled magnetic structures, magnetoresistive sensors, and magnetic disk drive systemsHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Dec 28, 2004·24 cites·19 claims
- 3585US7529066B2Magnetoresistive sensor having magnetic layers with tailored magnetic anisotropy induced by direct ion millingHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted May 5, 2009·6 cites·14 claims
- 3685US7460343B2Magnetic read sensor employing oblique etched underlayers for inducing uniaxial magnetic anisotropy in a hard magnetic in-stack bias layerHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Dec 2, 2008·12 cites·31 claims
- 3785US7436634B2Magnetically anisotropic shield for use in magnetic data recordingHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Oct 14, 2008·9 cites·19 claims
- 3885US7199984B2Current-perpendicular-to-plane magnetoresistive sensor with free layer stabilized by in-stack orthogonal magnetic couplingHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Apr 3, 2007·16 cites·36 claims
- 3985US6940691B2Electrically resistive heating device for data storage systemsHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Sep 6, 2005·16 cites·6 claims
- 4084US7833388B2End point detection for direct ion milling to induce magnetic anisotropy in a magnetic layerHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Nov 16, 2010·3 cites·24 claims
- 4184US7558028B2Magnetic head with improved CPP sensor using Heusler alloysHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jul 7, 2009·13 cites·23 claims
- 4283US7466521B2EMR structure with bias control and enhanced linearity of signalHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Dec 16, 2008·5 cites·19 claims
- 4383US7450350B2Current-perpendicular-to-the-plane (CPP) magnetoresistive sensor with antiparallel-pinned structure having segregated grains of a ferromagnetic material and additive Cu, Au or AgHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Nov 11, 2008·5 cites·26 claims
- 4483US7440227B2Magnetic head having a hall effect sensor and circuit for detecting recorded bits from magnetic recording mediaHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Oct 21, 2008·6 cites·37 claims
- 4582US7957106B2Chemically disordered material used to form a free layer or a pinned layer of a magnetoresistance (MR) read elementHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Jun 7, 2011·4 cites·8 claims
- 4682US6977801B2Magnetoresistive device with exchange-coupled structure having half-metallic ferromagnetic Heusler alloy in the pinned layerHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Dec 20, 2005·32 cites·22 claims
- 4781US8351165B2Current-perpendicular-to-the-plane (CPP) magnetoresistive sensor with CoFeGe ferromagnetic layers and Ag or AgCu spacer layerHITACHI GLOBAL STORAGE TECH NL·Filed 2010·Granted Jan 8, 2013·5 cites·24 claims
- 4881US7382580B2Electrically resistive heating deviceHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jun 3, 2008·3 cites·5 claims
- 4981US7106561B2Current-perpendicular-to-plane magnetoresistive sensor with free layer stabilized by in-stack orthogonal magnetic coupling to an antiparallel pinned biasing layerHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Sep 12, 2006·13 cites·25 claims
- 5080US8385025B2Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor with improved seed layer structure for hard bias layerHGST Netherlands BV·Filed 2010·Granted Feb 26, 2013·5 cites·19 claims
Showing the top 50 of 107 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Stefan Maat files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →