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公开(公告)号：US08784674B2
公开(公告)日：2014-07-22
申请号：US14098598
申请日：2013-12-06
发明人： Yan Wu , Zhigang Bai , Moris Dovek , Cherng-Chyi Han , Min Li , Jianing Zhou , Jiun-Ting Lee , Min Zheng
CPC分类号： G11B5/105 , G11B5/1278 , G11B5/3116 , G11B5/315 , G11B5/3163
摘要： A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a graded side shield that is conformal to the shape of the pole tip at an upper portion of the shield but not conformal to the pole tip at a lower portion. The shield includes a trailing shield, that is conformal to the trailing edge of the pole tip and may include a leading edge shield that magnetically connects two bottom ends of the graded side shield.
摘要翻译： 垂直磁记录（PMR）头被制造成具有通过分级侧屏蔽横向屏蔽的极尖，该平面侧屏蔽保护层在屏蔽的上部处与极尖的形状保持一致，但在下部不与极尖共形。 屏蔽件包括后挡板，其与电极尖端的后缘保持一致，并且可以包括磁性连接分级侧屏蔽件的两个底端的前缘屏蔽件。
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公开(公告)号：US10262683B2
公开(公告)日：2019-04-16
申请号：US15011892
申请日：2016-02-01
发明人： Matteo Staffaroni , Xuhui Jin , Weihao Xu , Cherng-Chyi Han , Weisheng Hu , Shengyuan Wang
摘要： A near field transducer (NFT) is formed between a waveguide and main pole layer at an air bearing surface (ABS). The NFT includes a resonator body layer made of Au, for example, with a front side at a first plane that is recessed a first distance from the ABS and a back side that is at a second plane formed parallel to the ABS and first plane. The NFT also has a peg layer with a rectangular peg portion between the ABS and first plane, and a larger back portion between the first and second planes that overlays directly above the resonator body layer. The peg layer is preferably made of Rh to improve mechanical stability of the NFT without significantly degrading overall optical efficiency of the NFT. A blocker may be formed between the ABS and waveguide to prevent light not coupled to the NFT from reaching the ABS.
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公开(公告)号：US09852752B1
公开(公告)日：2017-12-26
申请号：US15235171
申请日：2016-08-12
发明人： Tsutomu Chou , Kouji Shimazawa , Tobias Maletzky , Weihao Xu , Shinji Hara , Yoshihiro Tsuchiya , Yiming Wang , Cherng-Chyi Han , Xuhui Jin
CPC分类号： G11B5/4866 , G11B5/1278 , G11B5/3106 , G11B5/3136 , G11B5/314 , G11B5/3163 , G11B5/6082 , G11B5/6088 , G11B11/10506 , G11B11/1051 , G11B2005/0021
摘要： A TAMR (thermal assisted magnetic recording) write head has a metal blocker formed against a distal end of a waveguide. The waveguide focuses optical radiation on an adjacent plasmon generator where it excites plasmon modes that heat the recording medium. Although the plasmon generator typically heats the recording medium using the plasmon near field to supply the required Joule heating, an unblocked waveguide would also send optical radiation to the medium and surrounding structures producing unwanted heating and device unreliability. The role of the blocker is to block the unwanted optical radiation and, thereby, to limit the heating to that supplied by the plasmon near field.
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公开(公告)号：US11011192B1
公开(公告)日：2021-05-18
申请号：US16800036
申请日：2020-02-25
发明人： Weihao Xu , Ittetsu Kitajima , Cherng-Chyi Han , Xuhui Jin , Weisheng Hu , Ethan Lo
摘要： An optically shielded (thermally assisted magnetic recording (TAMR) head comprises a perpendicular magnetic recording (PMR) write head and a near-field transducer (NFT) having an emerging peg at the air-bearing surface (ABS). Self-aligned optical side shields (SA-OSS) are formed using a self-aligning process that positions the shields symmetrically relative to the emergent peg of the NFT. As a result of the symmetric positioning the down-track and cross-track near-field and near-field gradients are significantly sharpened.
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公开(公告)号：US20170221505A1
公开(公告)日：2017-08-03
申请号：US15011892
申请日：2016-02-01
发明人： Matteo Staffaroni , Xuhui Jin , Weihao Xu , Cherng-Chyi Han , Weisheng Hu , Shengyuan Wang
CPC分类号： G11B5/314 , G11B5/6088 , G11B2005/0021
摘要： A near field transducer (NFT) is formed between a waveguide and main pole layer at an air bearing surface (ABS). The NFT includes a resonator body layer made of Au, for example, with a front side at a first plane that is recessed a first distance from the ABS and a back side that is at a second plane formed parallel to the ABS and first plane. The NFT also has a peg layer with a rectangular peg portion between the ABS and first plane, and a larger back portion between the first and second planes that overlays directly above the resonator body layer. The peg layer is preferably made of Rh to improve mechanical stability of the NFT without significantly degrading overall optical efficiency of the NFT. A blocker may be formed between the ABS and waveguide to prevent light not coupled to the NFT from reaching the ABS.
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公开(公告)号：US10586560B1
公开(公告)日：2020-03-10
申请号：US16292457
申请日：2019-03-05
发明人： Shengyuan Wang , Weihao Xu , Cherng-Chyi Han , Xuhui Jin , Min Li , Kunliang Zhang
摘要： A PMR (perpendicular magnetic recording) head is configured for thermally assisted magnetic recording (TAMR). The thermal energy is supplied by the near-fields of plasmons and the near-fields are directed to a magnetic recording medium by a PPG layer. The PPG layer is Rhodium (Rh) whose small-grained crystal structure normally makes it subject to thermal deformations and other weaknesses. By growing the PPG layer on a thin template layer (TTL), the portion of the PPG layer adjacent to the air-bearing surface (ABS) develops a larger grain size and stronger forces between its atomic constituents which makes it resistant to those deformations.
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7.发明授权公开(公告)号：US10186288B1
公开(公告)日：2019-01-22
申请号：US15966179
申请日：2018-04-30
发明人： Weihao Xu , Cherng-Chyi Han , Weisheng Hu , Shengyuan Wang , Wen-Ding Huang , Ittetsu Kitajima
IPC分类号： G11B5/127 , G11B11/05 , G11B5/48 , C23F4/00 , C23C16/50 , C23C16/56 , C23C16/455 , G11B19/20 , G11B5/00
摘要： A method of forming a TAMR (thermally assisted magnetic recording) write head that uses weakly plasmonic materials that are mechanically strong and thermally stable to create plasmon near field energy. The replacement of highly plasmonic materials like Au with a weakly plasmonic material like Rh avoids the thermal deformations of softer metals like Au. To maintain the performance of the head, it includes pre-focusing structures that concentrate plasmon energy as it moves towards the air bearing surface (ABS). A waveguide blocker at the distal end of the waveguide enhances the plasmons at the interface between the blocker and the dielectric material at the distal end of the waveguide. A pair of symmetrically disposed optical side shields (OSS) are formed to either side of the pole tip and a weakly plasmonic optical field enhancer of sharply defined line-width further strengthens the optical field at its point of application. The resulting structure can be effectively used in a magnetic recording apparatus such as a hard disk drive.
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8.发明授权公开(公告)号：US10152991B2
公开(公告)日：2018-12-11
申请号：US15837205
申请日：2017-12-11
发明人： Tsutomu Chou , Kouji Shimazawa , Tobias Maletzky , Weihao Xu , Shinji Hara , Yoshihiro Tsuchiya , Yiming Wang , Cherng-Chyi Han , Xuhui Jin
摘要： A method for manufacturing a TAMR (thermal assisted magnetic recording) write head. The write head has a metal blocker formed against a distal end of a waveguide. The waveguide focuses optical radiation on an adjacent plasmon generator where it excites plasmon modes that heat the recording medium. Although the plasmon generator typically heats the recording medium using the plasmon near field to supply the required Joule heating, an unblocked waveguide would also send optical radiation to the medium and surrounding structures producing unwanted heating and device unreliability. The role of the blocker is to block the unwanted optical radiation and, thereby, to limit the heating to that supplied by the plasmon near field.
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9.发明申请公开(公告)号：US20180182419A1
公开(公告)日：2018-06-28
申请号：US15837205
申请日：2017-12-11
发明人： Tsutomu Chou , Kouji Shimazawa , Tobias Maletzky , Weihao Xu , Shinji Hara , Yoshihiro Tsuchiya , Yiming Wang , Cherng-Chyi Han , Xuhui Jin
IPC分类号： G11B5/48 , G11B5/60 , G11B5/31 , G11B11/105 , G11B5/00
CPC分类号： G11B5/4866 , G11B5/1278 , G11B5/3106 , G11B5/3136 , G11B5/314 , G11B5/3163 , G11B5/6082 , G11B5/6088 , G11B11/10506 , G11B11/1051 , G11B2005/0021
摘要： A TAMR (thermal assisted magnetic recording) write head and a method of its fabrication. The write head has a metal blocker formed against a distal end of a waveguide. The waveguide focuses optical radiation on an adjacent plasmon generator where it excites plasmon modes that heat the recording medium. Although the plasmon generator typically heats the recording medium using the plasmon near field to supply the required Joule heating, an unblocked waveguide would also send optical radiation to the medium and surrounding structures producing unwanted heating and device unreliability. The role of the blocker is to block the unwanted optical radiation and, thereby, to limit the heating to that supplied by the plasmon near field.
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