# US 10,872,627 B2 · Reversed mode spin torque oscillator with shaped field generation layer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,872,627 B2 - Document ID: US10872627B2 - Status: Granted - Kind: B2 - Application number: 16/991,971 - Filed: 2020-08-12 - Published: 2020-11-26 - Granted: 2020-12-22 - Earliest claimed: 2018-05-21 - Assignees: Western Digital Technologies, Inc. - Applicants: Western Digital Technologies, Inc. - Inventors: Quang Le; Yongchul Ahn; Susumu Okamura; Zheng Gao; Alexander Goncharov; Muhammad Asif Bashir; Petrus Antonius Van Der Heijden; James Mac Freitag - Web page: https://patentgrep.com/patent/US10872627B2 ## CPC - G11B 5/3133: {including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure (G11B5/3106 takes precedence)} - G11B 5/115: Shielding devices arranged between heads or windings ({G11B5/265} , G11B5/29 take precedence) - G11B 5/1278: {specially adapted for magnetisations perpendicular to the surface of the record carrier} - G11B 5/3116: {Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks (G11B5/3113, G11B5/245 take precedence)} - G11B 2005/0024: {Microwave assisted recording} - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, an STO disposed between the trailing shield and the main pole, and a non-magnetic conductive structure adjacent to the main pole and in contact with the STO. The STO includes an FGL and an SPL, and the FGL is disposed between the main pole and the SPL. The FGL includes a side extending over the main pole and at least a portion of the non-magnetic conductive structure. With the FGL disposed proximate to the main pole and over at least a portion of the non-magnetic conductive structure, current crowding and disturbance from the trailing shield are minimized. ## Claims ### Claim 1 A magnetic recording head, comprising: a leading shield; a trailing shield; a main pole having a surface at a media facing surface, wherein the surface includes a side; a spin torque oscillator in contact with the side of the main pole, wherein the spin torque oscillator comprises a spin polarization layer and a field generation layer; a non-magnetic conductive structure surrounding at least a portion of the main pole; a first current source directly connected to the main pole and the trailing shield; and a second current source directly connected to the main pole and the leading shield. ### Claim 2 (depends on 1) The magnetic recording head of claim 1, wherein the first current source is configured to flow a first current from the main pole to the trailing shield through the spin torque oscillator, and the second current source is configured to flow a second current from the main pole to the leading shield through the non-magnetic conductive structure. ### Claim 3 (depends on 1) The magnetic recording head of claim 1, wherein the first current source is configured to flow a first current from the trailing shield to the main pole through the spin torque oscillator, and the second current source is configured to flow a second current from the leading shield to the main pole through the non-magnetic conductive structure. ### Claim 4 (depends on 1) The magnetic recording head of claim 1, further comprising a non-magnetic conductive layer disposed between the trailing shield and the main pole. ### Claim 5 (depends on 4) The magnetic recording head of claim 4, further comprising a dielectric layer disposed between the spin torque oscillator and the non-magnetic conductive layer and between the trailing shield and the non-magnetic conductive layer. ### Claim 6 (depends on 1) The magnetic recording head of claim 1, wherein the second current source is connected to a non-magnetic conductive layer. ### Claim 7 (depends on 6) The magnetic recording head of claim 6, wherein the second current source is configured to flow a third current from the non-magnetic conductive layer to the main pole. ### Claim 8 (depends on 1) A data storage device comprising the magnetic recording head of claim 1. ### Claim 9 A magnetic recording head, comprising: a leading shield; a trailing shield; a main pole having a surface at a media facing surface, wherein the surface includes a side; a spin torque oscillator in contact with the side of the main pole, wherein the spin torque oscillator comprises a spin polarization layer, an underlayer, and a field generation layer disposed on the underlayer; a non-magnetic conductive structure surrounding at least a portion of the main pole, wherein the underlayer of the spin torque oscillator is in contact with the main pole and the non-magnetic conductive structure; a first current source connected to the main pole and the trailing shield; and a second current source connected to the main pole, the non-magnetic conductive structure, and the leading shield. ### Claim 10 (depends on 9) The magnetic recording head of claim 9, wherein the non-magnetic conductive structure comprises a non-magnetic electrically conductive metal. ### Claim 11 (depends on 10) The magnetic recording head of claim 10, wherein the non-magnetic conductive structure further comprises NiTa, Cr, Cu, or Rh. ### Claim 12 (depends on 9) The magnetic recording head of claim 9, wherein the spin polarization layer includes a surface at the media facing surface, wherein the surface has a rectangular shape. ### Claim 13 (depends on 9) The magnetic recording head of claim 9, wherein the underlayer includes a surface at the media facing surface, wherein the surface includes a side in contact with the main pole and the non-magnetic conductive structure. ### Claim 14 (depends on 13) The magnetic recording head of claim 13, wherein the side of the underlayer has a length substantially greater than the length of a side of the field generation layer. ### Claim 15 (depends on 13) The magnetic recording head of claim 13, wherein the side of the underlayer has a length substantially the same as the length of the side of the field generation layer. ### Claim 16 (depends on 9) A data storage device comprising the magnetic recording head of claim 9. ### Claim 17 A magnetic recording head, comprising: a leading shield; a trailing shield; a main pole having a surface at a media facing surface, wherein the surface includes a side; a spin torque oscillator in contact with the side of the main pole, wherein the spin torque oscillator comprises a spin polarization layer, an underlayer, and a field generation layer disposed on the underlayer; a non-magnetic conductive structure surrounding at least a portion of the main pole, wherein the underlayer of the spin torque oscillator is in contact with the main pole and the non-magnetic conductive structure; a first current source connected to the main pole and the trailing shield; and a second current source connected to the main pole and the non-magnetic conductive structure. ### Claim 18 (depends on 17) The magnetic recording head of claim 17, wherein the non-magnetic conductive structure comprises NiTa, Cr, Cu, or Rh, wherein the underlayer includes a surface at the media facing surface, and wherein the surface includes a side in contact with the main pole and the non-magnetic conductive structure. ### Claim 19 (depends on 17) A data storage device comprising the magnetic recording head of claim 17. ### Claim 20 (depends on 17) The magnetic recording head of claim 17, wherein the side of the underlayer has a length substantially greater than the length of a side of the field generation layer.