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公开(公告)号：US20180068679A1
公开(公告)日：2018-03-08
申请号：US15443760
申请日：2017-02-27
Applicant: Kabushiki Kaisha Toshiba
Inventor： Masayuki TAKAGISHI , Kenichiro YAMADA , Naoyuki NARITA , Tomoyuki MAEDA , Katsuya SUGAWARA , Yousuke ISOWAKI
IPC: G11B5/31 , H02K41/035 , H02P6/08
CPC classification number: G11B5/315 , G11B5/1278 , G11B5/17 , G11B5/3116 , G11B5/3123 , H02K41/0354 , H02P6/08
Abstract: According to one embodiment, a magnetic head includes a magnetic pole, and a coil. The coil includes a first coil portion separated from the magnetic pole in a first direction. The magnetic pole includes a magnetic pole end portion, and first and second magnetic pole edge portions connected to the magnetic pole end portion. The first coil portion includes first and second coil edge portions, and a third coil edge portion overlapping the magnetic pole and being connected to the first and second coil edge portions. The first magnetic pole edge portion includes a first magnetic pole overlap portion overlapping the first coil edge portion. The second magnetic pole edge portion includes a second magnetic pole overlap portion overlapping the second coil edge portion. The magnetic pole end portion has a magnetic pole end portion center in a second direction connecting the first and second magnetic pole overlap portions.
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公开(公告)号：US09754612B2
公开(公告)日：2017-09-05
申请号：US14947577
申请日：2015-11-20
Applicant: Headway Technologies, Inc.
Inventor： Yaguang Wei , Yuhui Tang , Moris Dovek , Yue Liu
CPC classification number: G11B5/315 , G11B5/1278 , G11B5/3116 , G11B5/3123
Abstract: A PMR writer is disclosed wherein magnetic flux return from a magnetic medium to a main pole is substantially greater through a trailing shield structure than through a leading shield and return path layer (RTP). Magnetic impedance is increased between the RTP and main pole in the leading return loop by modifying the size and shape of the back gap connection (BGC), by decreasing Bs in the RTP or reducing its thickness, or by removing one or more layers in the BGC and replacing with dielectric material or non-magnetic metal to form a dielectric gap between the RTP and main pole. As a result, area density control and bit error rate are improved over a conventional dual write shield (DWS) structure comprising two flux return pathways. Moreover, adjacent track erasure is maintained at a level similar to a DWS design.
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公开(公告)号：US20170125042A1
公开(公告)日：2017-05-04
申请号：US14930084
申请日：2015-11-02
Applicant: Yoshitaka SASAKI , Hiroyuki ITO , Kazuki SATO , Yukinori IKEGAWA , Shigeki TANEMURA , Kenichi TAKANO
Inventor： Yoshitaka SASAKI , Hiroyuki ITO , Kazuki SATO , Yukinori IKEGAWA , Shigeki TANEMURA , Kenichi TAKANO
CPC classification number: G11B5/17 , G11B5/1278 , G11B5/3123
Abstract: A magnetic head includes a coil, a main pole and a return path section. The return path section is located on the trailing side relative to the main pole so that a space is defined between the main pole and itself. The coil includes a first winding portion and a second winding portion connected in series. The first winding portion extends to pass through the aforementioned space, and extends once around the entire perimeter of the main pole as viewed from the medium facing surface. The second winding portion does not pass through the aforementioned space, and surrounds only a part of the entire perimeter of the main pole as viewed from the medium facing surface.
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公开(公告)号：US09412397B1
公开(公告)日：2016-08-09
申请号：US14608586
申请日：2015-01-29
Applicant: Headway Technologies, Inc.
Inventor： Hironori Araki , Yoshitaka Sasaki , Hiroyuki Ito , Seiichiro Tomita , Kazuki Sato , Hideo Mamiya
CPC classification number: G11B5/3123 , G11B5/17 , G11B5/3906 , G11B2005/0021
Abstract: A magnetic write head has a plated coil with narrow pitch and is suitable for writing at high frequencies on magnetic media with high coercivity. The narrow pitch is obtained without such disadvantages as overplating that has adversely affected prior art attempts to produce such narrow pitches. The process that produces the magnetic write head is characterized by an RIE plasma etch using O2/N2 to etch plating trenches into a baked layer of photoresist with the ratio of gases being 5/45 sccm so that a dilute O2 concentration does not create unwanted side etching of the plating trenches. In addition, a Cu seed layer is coated with an insulating layer of Al2O3 which redeposits on the trench sidewalls to inhibit redeposition of any Cu from the seed layer and prevent outward growth of the plated Cu that would result in overplating.
Abstract translation: 磁写头具有窄间距的电镀线圈，适用于高矫顽磁性介质的高频写入。 获得窄的间距没有诸如对现有技术尝试产生这种窄间距产生不利影响的过度镀敷的缺点。 产生磁写头的过程的特征在于使用O 2 / N 2的RIE等离子体蚀刻将电镀沟槽蚀刻成光致抗蚀剂的烘烤层，其中气体比例为5/45sccm，使得稀的O 2浓度不会产生不期望的侧面 蚀刻电镀槽。 此外，Cu籽晶层涂覆有Al 2 O 3的绝缘层，其重新沉积在沟槽侧壁上以抑制任何Cu从种子层的再沉积，并防止导致过镀的镀覆Cu的向外生长。
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公开(公告)号：US09384769B2
公开(公告)日：2016-07-05
申请号：US14867573
申请日：2015-09-28
Applicant: Seagate Technology LLC
Inventor： Jiaoming Qiu , Lei Lu , Xuelian Xu
CPC classification number: G11B5/6082 , G11B5/1272 , G11B5/1278 , G11B5/147 , G11B5/17 , G11B5/3116 , G11B5/3123
Abstract: A write head having a write pole with a tip portion defining a pole tip and a paddle portion extending from the tip portion away from the pole tip, the paddle portion defining a back edge. The write head also has a coil structure having at least two active turns crossing the paddle portion, wherein a back of the coil structure is no more than 1 micrometer past the back edge of the write pole. In some implementations, a length from the pole tip to the back edge is no more than 4.5 micrometers.
Abstract translation: 一种具有写入极的写入头，其具有限定极尖的尖端部分和从所述尖端部分远离所述极尖端延伸的桨状部分，所述桨形部分限定了后缘。 写头还具有线圈结构，该线圈结构具有至少两个与该桨叶部分相交的活动匝，其中线圈结构的背面经过写入极的后边缘不超过1微米。 在一些实施方案中，从极尖到后缘的长度不超过4.5微米。
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Patent Agency Ranking
6.发明授权公开(公告)号：US09378756B2
公开(公告)日：2016-06-28
申请号：US14792357
申请日：2015-07-06
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Kenichiro Yamada , Hitoshi Iwasaki , Masayuki Takagishi
CPC classification number: G11B5/09 , G11B5/1278 , G11B5/3123 , G11B5/3133 , G11B5/35 , G11B20/10222 , G11B2005/001
Abstract: An example magnetic recording apparatus includes a magnetic recording medium, a magnetic recording head and a signal processor. The magnetic recording head includes a first magnetic pole to apply a recording magnetic field to the magnetic recording medium; a spin torque oscillator arranged parallel to the first magnetic pole; and a first coil to magnetize the first magnetic pole. The signal processor writes and reads a signal on the magnetic recording medium by using the magnetic recording head and includes a first current circuit to supply a recording current to the first coil, the recording current including a recording signal to be recorded on the magnetic recording medium. The recording current includes either one of a signal changing at a frequency higher than that of the recording signal, and a signal having the same frequency as the recording signal and changing an absolute value thereof in one cycle.
Abstract translation: 一种示例性磁记录装置包括磁记录介质，磁记录头和信号处理器。 磁记录头包括用于向磁记录介质施加记录磁场的第一磁极; 与第一磁极平行布置的自旋转矩振荡器; 以及使第一磁极磁化的第一线圈。 信号处理器通过使用磁记录头在磁记录介质上写入和读取信号，并且包括向第一线圈提供记录电流的第一电流电路，记录电流包括要记录在磁记录介质上的记录信号 。 记录电流包括以高于记录信号的频率变化的信号中的任一个，以及与记录信号具有相同频率的信号，并且在一个周期内改变其绝对值。
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公开(公告)号：US09368133B2
公开(公告)日：2016-06-14
申请号：US14800919
申请日：2015-07-16
Applicant: Seagate Technology LLC
Inventor： Kirill Rivkin , Mourad Benakli , Huaqing Yin
CPC classification number: G11B5/17 , G11B5/1278 , G11B5/3116 , G11B5/3123 , G11B5/6082
Abstract: A data writer may be configured with at least a write pole and a continuous coil with the continuous coil having a first turn with a first cross-sectional shape and a second turn with a second cross-sectional shape that differs from the first cross-sectional shape. The second turn may be positioned proximal a leading edge of the write pole and an air bearing surface while the first turn is positioned distal the air bearing surface.
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公开(公告)号：US20160133290A1
公开(公告)日：2016-05-12
申请号：US14867573
申请日：2015-09-28
Applicant: Seagate Technology LLC
Inventor： Jiaoming Qiu , Lei Lu , Xuelian Xu
CPC classification number: G11B5/6082 , G11B5/1272 , G11B5/1278 , G11B5/147 , G11B5/17 , G11B5/3116 , G11B5/3123
Abstract: A write head having a write pole with a tip portion defining a pole tip and a paddle portion extending from the tip portion away from the pole tip, the paddle portion defining a back edge. The write head also has a coil structure having at least two active turns crossing the paddle portion, wherein a back of the coil structure is no more than 1 micrometer past the back edge of the write pole. In some implementations, a length from the pole tip to the back edge is no more than 4.5 micrometers.
Abstract translation: 一种具有写入极的写入头，其具有限定极尖的尖端部分和从所述尖端部分远离所述极尖端延伸的桨状部分，所述桨形部分限定了后缘。 写头还具有线圈结构，该线圈结构具有至少两个与该桨叶部分相交的活动匝，其中线圈结构的背面经过写入极的后边缘不超过1微米。 在一些实施方案中，从极尖到后缘的长度不超过4.5微米。
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公开(公告)号：US09286918B1
公开(公告)日：2016-03-15
申请号：US14798998
申请日：2015-07-14
Applicant: Seagate Technology LLC
Inventor： Jianhua Xue , Jiaoming Qiu , Kirill Rivkin , Huaqing Yin , John Wolf , Yonghua Chen
CPC classification number: G11B5/17 , G11B5/1278 , G11B5/3116 , G11B5/3123 , G11B5/313
Abstract: A write head having a main pole having a pole tip proximate an air bearing surface (ABS), the main pole having a leading side and a trailing side. The write head also includes a yoke having a yoke tip recessed from the ABS, and a helical coil wrapped around the main pole and the yoke. The helical coil has a first turn with its front edge at least substantially aligned with the yoke tip.
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公开(公告)号：US09202479B1
公开(公告)日：2015-12-01
申请号：US14560243
申请日：2014-12-04
Applicant: Seagate Technology LLC
Inventor： James Gary Wessel , Raul Horacio Andruet , Chris Rea
IPC: G11B5/31
CPC classification number: G11B5/31 , G11B5/17 , G11B5/3123 , G11B5/3133 , G11B5/314 , G11B2005/0021
Abstract: An apparatus includes a heat assisted magnetic recording (HAMR) head that comprises a write coil, a write coil heatsink, and a spacer. The write coil heatsink is thermally coupled to the write coil. The spacer lies intermediate the write coil and the write coil heatsink.
Abstract translation: 一种装置包括一个包括写入线圈，写入线圈散热器和间隔物的热辅助磁记录（HAMR）头。 写入线圈散热器热耦合到写入线圈。 间隔物位于写入线圈和写入线圈散热片之间。
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