公开(公告)号：US20240038261A1

公开(公告)日：2024-02-01

申请号：US17978480

申请日：2022-11-01

申请人： SAE Magnetics (H.K.) Ltd.

发明人： Ryuji FUJII ,  Shi Xiong CHEN ,  Zeng Hui ZHANG ,  Yong LEI ,  Yong Jun ZHANG

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/49

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.

公开(公告)号：US11881235B2

公开(公告)日：2024-01-23

申请号：US17652066

申请日：2022-02-22

申请人： Western Digital Technologies, Inc.

发明人： Alexander Goncharov ,  Zhanjie Li ,  Terence T. Lam ,  Suping Song

IPC分类号： G11B5/31 ,  G11B5/187 ,  G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/1276 ,  G11B5/187 ,  G11B5/315

摘要： The present disclosure relates to a magnetic recording head having an exchange biased leading shield or leading edge shield (LES). The LES is a bilayer structure. One or more layers are coupled below the LES such that the LES is disposed between the main pole and the one or more layers. The one or more layers exchange bias the LES such that the upper layer of the LES has a magnetization parallel to the magnetization of the trailing shield. The lower layer of the LES has a magnetization that is antiparallel to the magnetization of the upper layer of the LES. The one or more layers set the preferred direction for the lower layer of the LES and sets the LES as a two-domain state without relying upon the anisotropy field (Hk) of either the upper or lower layers of the LES.

公开(公告)号：US09520146B1

公开(公告)日：2016-12-13

申请号：US13972002

申请日：2013-08-21

申请人： Western Digital (Fremont), LLC

发明人： Jinwen Wang ,  Weimin Si ,  Jianxin Fang ,  Ying Hong ,  Hongzhou Jiang ,  Ching-Huang Lu ,  Yan Chen ,  Donghong Li ,  Lien-Chang Wang ,  Lieping Zhong ,  Tao Pan

IPC分类号： G11B5/127 ,  H04R31/00 ,  G11B5/11 ,  G11B5/31

CPC分类号： G11B5/112 ,  G11B5/1276 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3153 ,  G11B5/3163 ,  H04R31/00 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A method of forming a wrapped-around shielded perpendicular magnetic recording writer pole is disclosed. A structure comprising a leading shield layer and an intermediate layer disposed over the leading shield layer is provided, the intermediate layer comprising a pole material and a dielectric material. A trench is formed in the dielectric material. A non-magnetic layer in the trench is removed via an ion beam etching process. A seed layer is deposited in the trench and over the pole material. A magnetic material comprising a side shield layer is deposited on at least a portion of the seed layer.

摘要翻译： 公开了一种形成缠绕的屏蔽垂直磁记录写入极的方法。 提供了包括引导屏蔽层和设置在引导屏蔽层之上的中间层的结构，所述中间层包括极材料和电介质材料。 在电介质材料中形成沟槽。 通过离子束蚀刻工艺去除沟槽中的非磁性层。 种子层沉积在沟槽中并在极材料上方。 包含侧屏蔽层的磁性材料沉积在籽晶层的至少一部分上。

公开(公告)号：US07701665B2

公开(公告)日：2010-04-20

申请号：US11271394

申请日：2005-11-10

申请人： Matthew P. Dugas

发明人： Matthew P. Dugas

IPC分类号： G11B5/29 ,  G11B5/133 ,  G11B5/187

CPC分类号： G11B5/1276 ,  G11B5/1877 ,  G11B5/29 ,  G11B5/295 ,  G11B5/3116 ,  G11B5/4893 ,  G11B5/584 ,  Y10T29/49046 ,  Y10T29/49052

摘要： A thin film magnetic recording head is provided with a tape bearing surface that has magnetically isolated channels while still providing a maximum continuous surface area with which to engage the media. This can be accomplished by providing spaces in the magnetically permeable thin film that are large enough to prevent cross-talk between the channels, but small enough to prevent significant interference with the moving media. Alternatively, magnetically impermeable thin film spacers can be provided to magnetically isolate each of the channels. The spacers are generally even with the magnetically permeable thin film so as to provide a continuous media-bearing surface.

摘要翻译： 薄膜磁记录头设置有具有磁隔离通道的带支承表面，同时仍然提供与介质接合的最大连续表面积。 这可以通过在导磁薄膜中提供足够大的空间以防止通道之间的串扰来实现，但是足够小以防止对移动介质的显着干扰。 或者，可以提供磁不可渗透的薄膜间隔件以磁化地隔离每个通道。 间隔物通常甚至具有导磁薄膜，以便提供连续的介质承载表面。

公开(公告)号：US20100002335A1

公开(公告)日：2010-01-07

申请号：US12430653

申请日：2009-04-27

申请人： Matthew P. Dugas

发明人： Matthew P. Dugas

IPC分类号： G11B5/265 ,  B32B37/02

CPC分类号： G11B5/23 ,  G11B5/127 ,  G11B5/1276 ,  G11B5/193 ,  G11B5/232 ,  G11B5/235 ,  G11B5/29 ,  G11B5/295 ,  G11B5/3116 ,  G11B5/4893 ,  G11B5/584 ,  G11B20/1211 ,  G11B20/1217 ,  Y10T29/49055 ,  Y10T29/49057

摘要： A thin film magnetic recording head is fabricated by forming a substrate from opposing ferrite blocks which have a ceramic member bonded between them. This structure is then diced to form a plurality of columns, wherein each column has a ferrite/ceramic combination. Each column represents a single channel in the completed head. A block of ceramic is then cut to match the columned structure and the two are bonded together. The bonded structure is then cut or ground until a head is formed, having ceramic disposed between each channel. A ferrite back-gap is then added to each channel, minimizing the reluctance of the flux path. The thin film is patterned on the head to optimize various channel configurations.

摘要翻译： 通过从相对的铁素体块形成衬底来制造薄膜磁记录头，所述铁氧体块在它们之间具有陶瓷构件。 然后将该结构切成多个柱，其中每个柱具有铁素体/陶瓷组合。 每列表示完成的头中的单个通道。 然后切割一块陶瓷以匹配柱状结构，并将两个结合在一起。 然后将接合结构切割或研磨直到形成头部，其中陶瓷设置在每个通道之间。 然后将铁氧体背隙添加到每个通道，使磁通路径的磁阻最小化。 该薄膜在头部被图案化以优化各种通道配置。

公开(公告)号：US07025659B2

公开(公告)日：2006-04-11

申请号：US10047210

申请日：2002-01-14

申请人： Florence Eschbach ,  Eric James Lee ,  Peter Beverley Powell Phipps ,  Amanda Baer ,  Edward Hin Pong Lee ,  Francisco Martin

发明人： Florence Eschbach ,  Eric James Lee ,  Peter Beverley Powell Phipps ,  Amanda Baer ,  Edward Hin Pong Lee ,  Francisco Martin

IPC分类号： B24B1/00 ,  G11B5/127

CPC分类号： G11B5/1276 ,  B24B37/044 ,  C09G1/02 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49048

摘要： A method for simultaneously planarizing to relatively equal smoothness a thin film magnetic head hardbaked resist structure having relatively low surface energy and one or more additional thin film magnetic head structures containing other materials having comparatively higher surface energy, such as copper, hardbaked resist, alumina and NiFe. The method begins with preparation of a chemical mechanical polishing (CMP) slurry targeted at equaling the removal rate of the materials to be planarized. The CMP slurry includes a liquid vehicle, an abrasive, and a surfactant. The CMP slurry is applied to the surface of the structures to be planarized and the structures are simultaneously planarized using a CMP planarization technique.

公开(公告)号：US20050054271A1

公开(公告)日：2005-03-10

申请号：US10655888

申请日：2003-09-05

申请人： Roger Hutchison ,  Hsi-Ling Lee

发明人： Roger Hutchison ,  Hsi-Ling Lee

IPC分类号： B24B1/00 ,  G11B20060101 ,  G11B5/127

CPC分类号： G11B5/1276

摘要： An apparatus is provided for destroying or disabling an information or data storage device comprising a first layer and a second layer bonded together. A mechanical device or energy form is inserted into the information or data storage device to cause the first and second layers to separate from each other.

摘要翻译： 提供一种用于破坏或禁用包括结合在一起的第一层和第二层的信息或数据存储装置的装置。 将机械装置或能量形式插入到信息或数据存储装置中以使第一和第二层彼此分离。

公开(公告)号：US5905612A

公开(公告)日：1999-05-18

申请号：US895205

申请日：1997-07-16

申请人： Yoshiyasu Honma ,  Ken Masaki ,  Ken Takahashi

发明人： Yoshiyasu Honma ,  Ken Masaki ,  Ken Takahashi

IPC分类号： G11B5/008 ,  G11B5/127 ,  G11B5/187 ,  G11B5/23 ,  G11B5/53

CPC分类号： G11B5/1272 ,  G11B5/127 ,  G11B5/1276 ,  G11B5/1871 ,  G11B5/1878 ,  G11B5/232 ,  G11B5/53 ,  G11B5/0086 ,  Y10T29/49046 ,  Y10T29/49052 ,  Y10T29/49057

摘要： A magnetic head can be made by a first step of butting projection end faces of a pair of magnetic cores, each of which is previously machined into a convex shape, through a magnetic gap member; a second step of forming notches which reach a winding groove, at the butted projection end faces of the magnetic cores by an electric discharge machining process, thereby regulating a track width; and a third step of filling, under heat treatment, glass into grooves at two sides of the pair of convex magnetic cores and the notches. When the magnetic head is used, a magnetic recording/reproduction apparatus which is suitable for high density recording such as a digital VTR is provided.

摘要翻译： 磁头可以通过第一步骤，通过磁隙构件对接预先加工成凸形的一对磁芯的突出端面; 通过放电加工工艺在磁芯的对接的突出端面处形成到达绕线槽的凹口的第二步骤，从而调节轨道宽度; 以及在热处理下将玻璃填充到一对凸磁芯和凹口两侧的凹槽中的第三步骤。 当使用磁头时，提供适用于高密度记录的磁记录/再现装置，例如数字VTR。

公开(公告)号：US5768072A

公开(公告)日：1998-06-16

申请号：US663841

申请日：1996-06-14

申请人： Yutaka Ueta ,  Hiroyuki Ohno ,  Takao Yamano ,  Kiyotaka Itou ,  Kousou Ishihara ,  Kazuhiro Koga ,  Yoshifumi Fukumoto ,  Atsushi Furuzawa ,  Takahiro Ogawa ,  Hiroyuki Okuda ,  Toshinori Urano

发明人： Yutaka Ueta ,  Hiroyuki Ohno ,  Takao Yamano ,  Kiyotaka Itou ,  Kousou Ishihara ,  Kazuhiro Koga ,  Yoshifumi Fukumoto ,  Atsushi Furuzawa ,  Takahiro Ogawa ,  Hiroyuki Okuda ,  Toshinori Urano

IPC分类号： G11B5/127 ,  G11B5/187 ,  G11B5/23 ,  G11B5/31

CPC分类号： G11B5/1276 ,  G11B5/1878 ,  G11B5/232

摘要： A magnetic head comprises a first abutting segment formed with a winding groove having an open side, and a second abutting segment opposed to the open side of the groove and joined to the first segment. The first abutting segment comprises a first core segment having the groove, and gap spacers and second ferromagnetic thin films formed on the surface thereof opposed to the second segment and positioned above and below the groove. The first core segment comprises a core segment member made of a ferromagnetic material, formed with the groove and having a first ferromagnetic thin film which is formed on the surface thereof opposed to the second abutting segment and which is positioned toward the face of the head to be opposed to recording media. The second abutting segment has a face to be opposed to the recording medium and formed by a nonmagnetic material.

摘要翻译： 磁头包括形成有具有开口侧的卷绕槽的第一邻接部分和与凹槽的敞开侧相对并连接到第一部分的第二邻接部分。 第一邻接部分包括具有凹槽的第一芯部段和形成在其与第二部分相对并且位于沟槽上方和下方的表面上的间隔间隔物和第二铁磁性薄膜。 第一芯部段包括由铁磁材料制成的芯部分部件，其形成有沟槽并且具有第一铁磁性薄膜，该第一铁磁性薄膜形成在与第二抵接部分相对的表面上并且朝向头部的表面定位 反对记录媒体。 第二邻接部分具有与记录介质相对并由非磁性材料形成的面。

公开(公告)号：US5761789A

公开(公告)日：1998-06-09

申请号：US461964

申请日：1995-06-05

申请人： Yoshiyasu Honma ,  Ken Masaki ,  Ken Takahashi

发明人： Yoshiyasu Honma ,  Ken Masaki ,  Ken Takahashi

IPC分类号： G11B5/008 ,  G11B5/127 ,  G11B5/187 ,  G11B5/23 ,  G11B5/53 ,  G11B5/235

CPC分类号： G11B5/1272 ,  G11B5/127 ,  G11B5/1276 ,  G11B5/1871 ,  G11B5/1878 ,  G11B5/232 ,  G11B5/53 ,  G11B5/0086 ,  Y10T29/49046 ,  Y10T29/49052 ,  Y10T29/49057

摘要： A method of making a magnetic head comprising: a first step of butting projection end faces of a pair of magnetic cores each of which is previously machined into a convex shape, through a magnetic gap member; a second step of forming notches which reach a winding groove, at said butted projection end faces of said magnetic cores by an electric discharge machining process, thereby regulating a track width; and a third step of filling under heat treatment glass into grooves at two sides of said pair of convex magnetic cores and said notches. When the magnetic head is used, a magnetic recording/reproduction apparatus which is suitable for high density recording such as a digital VTR is provided.

摘要翻译： 一种制造磁头的方法，包括：通过磁隙构件对接预先加工成凸形的一对磁芯的突出端面的第一步骤; 通过放电加工工艺在所述磁芯的所述对接的突出端面处形成到达绕线槽的凹口的第二步骤，从而调节轨道宽度; 以及在热处理玻璃下填充到所述一对凸磁芯和所述凹口两侧的凹槽中的第三步骤。 当使用磁头时，提供适用于高密度记录的磁记录/再现装置，例如数字VTR。