Patent assignee · NL · COMPANY

HGST Netherlands, B.V.

988Patents
986Active
988Granted
64Portfolio score

Filing activity: Aug 30, 2004 → Jan 13, 2017 · 145 expiring within 5 years

Most-cited patents

PatentTitleAreaCited byStatus
US8623770B1 Method for sidewall spacer line doubling using atomic layer deposition of a titanium oxide Electricity 368 Active
US9965539B2 Computer implemented method for dynamic sharding Physics 165 Active
US8617408B2 Method for manufacturing a magnetic read sensor with narrow track width using amorphous carbon as a hard mask and localized CMP Emerging Cross-Sectional Technologies 93 Active
US8462461B2 Spin-torque oscillator (STO) with magnetically damped free layer Physics 82 Active
US8634163B2 Dual reverse microwave assisted magnetic recording (MAMR) and systems thereof Physics 68 Active
US8472135B1 Microwave-assisted magnetic recording head having a current confinement structure Physics 64 Active
US8699162B1 Shingled magnetic recording disk drive with multiple data zones containing different numbers of error-correction-code sectors Physics 51 Active
US8446690B2 Perpendicular magnetic recording write head with spin torque oscillator for fast switching of write pole magnetization Physics 51 Active
US8995088B1 Heat sink for a spin torque oscillator (STO) in microwave assisted magnetic recording (MAMR) Emerging Cross-Sectional Technologies 49 Active
US9064508B1 Pile spin-torque oscillator with AF-mode oscillation for generating high AC-field in microwave-assisted magnetic recording Physics 47 Active
US9337415B1 Perpendicular spin transfer torque (STT) memory cell with double MgO interface and CoFeB layer for enhancement of perpendicular magnetic anisotropy Electricity 46 Active
US8576518B1 Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor with exchange-coupled side shield structure Physics 45 Active
US8531793B2 Disk drive with variable incremented counting of writes to the data tracks for minimizing the effect of far track erasure Physics 44 Active
US8792210B2 Asymmetric writer for shingled magnetic recording Physics 43 Active
US8456780B1 Uncoupled piezoelectric milli-actuator assembly Physics 40 Active
US8958172B1 Multiple disk stack, single actuator hard disk drive Physics 39 Active
US8958173B1 Hard disk drive having multiple movable disk stacks on a guide rail Physics 37 Active
US8553346B2 Implementing spin-torque oscillator sensing with enhanced delay control feedback circuit for hard disk drives Physics 36 Active
US9218833B1 Load/unload ramps for multiple disk-stack, shared actuator hard disk drive Physics 36 Active
US8654465B2 Implementing spin-torque oscillator sensing with enhanced demodulator for hard disk drives Physics 36 Active
US9355655B1 Magnetic capping layer structure for a spin torque oscillator Physics 35 Active
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
US8902720B1 Heat-assisted magnetic recording (HAMR) write head with protective film for near-field transducer 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

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.