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公开(公告)号：US12106783B2
公开(公告)日：2024-10-01
申请号：US18348073
申请日：2023-07-06
发明人： Da Yao He , Rong Huang , Hua Li , Jian Hui Huang , Peng Liu
CPC分类号： G11B5/255 , G11B5/3106 , G11B5/40 , G11B2005/0021 , G11B2005/0024 , G11B5/4826
摘要： The present disclosure discloses a device with a protective layer, including a substrate, a seed layer formed on the substrate, and a diamond-like carbon layer formed on the seed layer, where the seed layer is a silicon nitride layer, and a content of nitrogen in the silicon nitride layer is 9%-17%. The present disclosure further discloses a microwave-assisted magnetic recording (MAMR) head slider, a head gimbal assembly, and a disk drive unit. The device has good thermal stability, oxidation resistance and corrosion resistance, thereby improving reliability and prolonging service life of an MAMR head.
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公开(公告)号：US11973310B2
公开(公告)日：2024-04-30
申请号：US16505964
申请日：2019-07-09
发明人： Takashi Honda , Kowang Liu , Kwun Pan Ng , Makoto Kawato
CPC分类号： H01S5/0216 , G11B5/314 , H01S5/0237 , H01S5/0261 , G11B2005/0021 , H01S5/02453
摘要： A light source unit for thermally-assisted magnetic head includes a substrate member having a first bonding surface; a light source assembly attached on the first bonding surface of the substrate member and having a second bonding surface; and a heater circuit assembly formed between the substrate member and the light source assembly, the heater circuit assembly having a heater formed on the substrate member and two leads connected at two ends of the heater, the lead being thicker than the heater, thereby a distance between the heater and the second bonding surface is farther than that between the lead and the second bonding surface. The light source unit can reduce mechanical stress and thermal conduction between a light source assembly and a substrate member, thereby improving the performance of the light source assembly and the heater.
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3.发明公开公开(公告)号：US20240038261A1
公开(公告)日：2024-02-01
申请号：US17978480
申请日：2022-11-01
发明人： Ryuji FUJII , Shi Xiong CHEN , Zeng Hui ZHANG , Yong LEI , Yong Jun ZHANG
CPC分类号： G11B5/3169 , G11B5/1276 , G11B5/3173 , G11B5/49
摘要： The present disclosure discloses a magnetic head, a head gimbal assembly, a hard disk drive, and a method for processing a magnetic head. The method comprises irradiating at a fixed point proximal to the read/write part with a laser irradiation device until the read head and the write head are thermally expanded; orientating air bearing surfaces of a plurality of magnetic heads forming a magnetic strip toward a lapping surface of a lapping device after laser irradiation, holding the air bearing surfaces in place, lapping with the lapping device until the air bearing surfaces are coplanar; and disassembling the magnetic strip to obtain a lapped magnetic head. Through laser heating induced compensation, the heights of lapped read head and write head of the magnetic head meet their respective target values, ensuring the normal reading and writing of the storage medium of the magnetic disk.
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4.发明公开公开(公告)号：US20240013804A1
公开(公告)日：2024-01-11
申请号：US18348073
申请日：2023-07-06
发明人： Da Yao HE , Rong HUANG , Hua LI , Jian Hui HUANG , Peng LIU
CPC分类号： G11B5/3106 , G11B5/4826 , G11B2005/0021
摘要： The present disclosure discloses a device with a protective layer, including a substrate, a seed layer formed on the substrate, and a diamond-like carbon layer formed on the seed layer, where the seed layer is a silicon nitride layer, and a content of nitrogen in the silicon nitride layer is 9%-17%. The present disclosure further discloses a microwave-assisted magnetic recording (MAMR) head slider, a head gimbal assembly, and a disk drive unit. The device has good thermal stability, oxidation resistance and corrosion resistance, thereby improving reliability and prolonging service life of an MAMR head.
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公开(公告)号：US11735212B1
公开(公告)日：2023-08-22
申请号：US17727850
申请日：2022-04-25
发明人： Natsuo Nishijima
CPC分类号： G11B5/4826 , G11B5/314 , G11B5/3106 , G11B13/08 , G11B2005/0021
摘要： A thermally assisted magnetic head includes a slider, the slider includes a slider substrate and a magnetic head part. The magnetic head part includes a recording head, a reading head, a near field transducer and a medium-opposing surface. The medium-opposing surface includes a recording area and a reading area. The magnetic head part includes a record/read separately protective structure which a stabilized protective film is formed on the recording area and a reading head protective film is formed on the reading area. The stabilized protective film includes a three-layers structure which a seed layer and a double protective layer are laminated. The double protective layer includes a YSZ protective layer and a hard protective layer. The reading head protective film includes a thickness which is thinner than the stabilized protective film.
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公开(公告)号：US11562766B1
公开(公告)日：2023-01-24
申请号：US17727844
申请日：2022-04-25
发明人： Natsuo Nishijima , Xiao Ke Ding
摘要： A thermally assisted magnetic head includes a slider, the slider includes a slider substrate and a magnetic head part. The magnetic head part includes a recording head, a reading head, a near field transducer and a medium-opposing surface. The medium-opposing surface includes a recording area and a reading area. The magnetic head part includes a record/read separately protective structure which an enhanced protective film is formed on the recording area and a reading head protective film is formed on the reading area. The enhanced protective film includes a plurality of films for effectively protecting the recording head and the near field transducer. The reading head protective film includes a thickness which is thinner than the enhanced protective film.
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公开(公告)号：US11308981B2
公开(公告)日：2022-04-19
申请号：US17341553
申请日：2021-06-08
发明人： Shi Xiong Chen , Bin Qi , Wen Rong Guo , Peng Liu
摘要： A lapping method of a MAMR head slider includes a first lapping process: controlling the lapping plate to spin at a first speed, and controlling the MAMR head slider to move at a first moving speed, and applying a first force to the MAMR head slider; and a second lapping process: controlling the lapping plate to spin at a second speed that is lower than the first speed, and controlling the MAMR head slider to move at a second moving speed that is lower than the first moving speed, and applying a second force that is lower than the first force to the MAMR head slider; and the second lapping process includes a final lapping process section, and the second force in the final lapping process being zero. In such a way, lapping marks on the ABS are reduced to improve the roughness and the reliability.
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公开(公告)号：US20200218083A1
公开(公告)日：2020-07-09
申请号：US16731651
申请日：2019-12-31
发明人： Xianwen FENG , Ying XIAO
摘要： The present invention relates to the field of camera shake reduction technology and discloses a suspension assembly of OIS, which comprises a printed circuit board and a spring plate movably disposed on the printed circuit board, wherein the printed circuit board is electrically connected with the spring plate, the printed circuit board comprises a substrate plate and a bend portion extending downwards along any side edge of the substrate plate, a support component is attached to a bottom surface of the substrate plate, a plurality of conductive terminals are arranged on an outside surface of the bend portion, a plurality of reinforce components are arranged on an inside surface of the bend portion and corresponding to the plurality of conductive terminals one to one, and the plurality of reinforce components are placed at intervals and do not contact with each other.
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9.发明授权公开(公告)号：US10650856B1
公开(公告)日：2020-05-12
申请号：US16367224
申请日：2019-03-27
发明人： Ryo Hosoi , Seiichi Takayama
摘要： A thermally assisted magnetic head including a slider and a light source-unit. The slider includes a slider substrate and a magnetic head part. The light source-unit includes a laser diode and a sub-mount. The magnetic head part includes a medium-opposing surface, a light source-opposing surface and a waveguide which guides laser light from the light source-opposing surface to the medium-opposing surface. The thermally assisted magnetic head includes an optimal-structure which the following optimizing conditional expression, concerning an inlet-optical path length L1 of an inlet-interval of the waveguide, and an outlet-optical path length L2 of an outlet-interval, is satisfied, m1×L1=L2 (m1 is a natural number).
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10.发明申请公开(公告)号：US20200091401A1
公开(公告)日：2020-03-19
申请号：US16136243
申请日：2018-09-19
发明人： Wei Xiong , Atsushi Iijima
IPC分类号： H01L41/047 , H01L41/08 , G11B5/48
摘要： A thin-film piezoelectric-material element includes a laminated structure part having a lower electrode film, a piezoelectric-material film laminated on the lower electrode film and an upper electrode film laminated on the piezoelectric-material film. The piezoelectric-material film includes a size larger than the upper electrode film, a riser end-surface and step-surface formed on a top-surface of the upper electrode film side. The riser end-surface connects smoothly with a peripheral end-surface of the upper electrode film and vertically intersects with the top-surface. The step-surface intersects vertically with the riser end-surface.
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