Stefan Maat
86Patents
17h-index
65Co-inventors
87Inventor score
Filing activity: Jan 29, 2001 → Jan 12, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6653704B1 | Magnetic memory with tunnel junction memory cells and phase transition material for controlling current to the cells | Electricity | 68 | Expired |
| US7791844B2 | Magnetoresistive sensor having a magnetically stable free layer with a positive magnetostriction | Physics | 49 | Active |
| US8576518B1 | Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor with exchange-coupled side shield structure | Physics | 45 | Active |
| US6834026B2 | Method for thermally-assisted recording on a magnetic recording disk | Emerging Cross-Sectional Technologies | 45 | Expired |
| US6650513B2 | Magnetic devices with a ferromagnetic layer having perpendicular magnetic anisotropy and an antiferromagnetic layer for perpendicularly exchange biasing the ferromagnetic layer | Emerging Cross-Sectional Technologies | 44 | Expired |
| US7372116B2 | Heat assisted switching in an MRAM cell utilizing the antiferromagnetic to ferromagnetic transition in FeRh | Physics | 39 | Expired |
| US8638530B1 | Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor having a top shield with an antiparallel structure | Physics | 34 | Active |
| US8873204B1 | Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor structure with multiple stacked sensors and center shield with CoFeB insertion layer | Physics | 32 | Active |
| US9042059B1 | Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor structure with multiple stacked sensors and improved center shield | Physics | 32 | Active |
| US8749926B1 | Scissor magnetic read head with wrap-around magnetic shield | Physics | 27 | Active |
| US8208228B2 | Current-perpendicular-to-the-plane (CPP) magnetoresistive read head with multiple sensing elements for patterned-media | Physics | 27 | Active |
| US8085490B2 | Slider fly-height control in a hard disk drive | Physics | 26 | Active |
| US7298597B2 | Magnetoresistive sensor based on spin accumulation effect with free layer stabilized by in-stack orthogonal magnetic coupling | Electricity | 24 | Expired |
| US8780506B1 | Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor with side shields and an antiparallel structure top shield | Physics | 22 | Active |
| US6977801B2 | Magnetoresistive device with exchange-coupled structure having half-metallic ferromagnetic Heusler alloy in the pinned layer | Physics | 20 | Expired |
| US7551409B2 | Current-perpendicular-to-the-plane (CPP) magnetoresistive sensor with improved ferromagnetic free layer structure | Physics | 18 | Active |
| US8015694B2 | Method for making a scissoring-type current-perpendicular-to-the-plane (CPP) magnetoresistive sensor | Emerging Cross-Sectional Technologies | 17 | Active |
| US7382586B2 | Magnetic read sensor employing oblique etched underlayers for inducing uniaxial magnetic anisotropy in a self biased free layer | Electricity | 16 | Active |
| US8416539B2 | Magnetic field sensing system using spin-torque diode effect | Electricity | 16 | Active |
| US8218270B1 | Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor with improved hard magnet biasing structure | Electricity | 16 | Active |
| US6836392B2 | Stability-enhancing underlayer for exchange-coupled magnetic structures, magnetoresistive sensors, and magnetic disk drive systems | Physics | 14 | Expired |
| US8233247B2 | Scissoring-type current-perpendicular-to-the-plane giant magnetoresistance (CPP-GMR) sensors with damped free layer structures | Physics | 13 | Active |
| US7203036B2 | Planar extraordinary magnetoresistance sensor | Physics | 11 | Expired |
| US7057862B2 | Current-perpendicular-to-plane-magnetoresistive sensor with free layer stabilized against vortex magnetic domains generated by the sense current | Physics | 11 | Expired |
| US6940691B2 | Electrically resistive heating device for data storage systems | Physics | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.