公开(公告)号：US11869540B2

公开(公告)日：2024-01-09

申请号：US17884623

申请日：2022-08-10

申请人： KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

发明人： Tazumi Nagasawa ,  Yuji Nakagawa ,  Naoyuki Narita ,  Masayuki Takagishi ,  Tomoyuki Maeda ,  Ryo Osamura

IPC分类号： G11B21/02 ,  G11B5/31 ,  G11B5/21

CPC分类号： G11B21/02 ,  G11B5/21 ,  G11B5/3146

摘要： According to one embodiment, a magnetic head includes first and second magnetic poles, a stacked body, and first to third terminals. The stacked body is provided between the first and second magnetic poles. The stacked body includes a first magnetic layer, a second magnetic layer between the first magnetic layer and the second magnetic pole, a third magnetic layer between the second magnetic layer and the second magnetic pole, a fourth magnetic layer between the third magnetic layer and the second magnetic pole, a first nonmagnetic layer between the first magnetic pole and the first magnetic layer, a second nonmagnetic layer between the first and second magnetic layers, a third nonmagnetic layer between the second and third magnetic layers, a fourth nonmagnetic layer between the third and fourth magnetic layers and a fifth nonmagnetic layer between the fourth magnetic layer and the second magnetic pole.

公开(公告)号：US20220399033A1

公开(公告)日：2022-12-15

申请号：US17587198

申请日：2022-01-28

申请人： KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

发明人： Yuji NAKAGAWA ,  Naoyuki NARITA ,  Masayuki TAKAGISHI ,  Tomoyuki MAEDA ,  Tazumi NAGASAWA ,  Kenichiro YAMADA ,  Akira KIKITSU

IPC分类号： G11B5/21 ,  G11B5/31

摘要： A magnetic head includes a first magnetic pole, a second magnetic pole, a magnetic element, and a magnetic member. The magnetic element is provided between the first and second magnetic poles, and includes a first magnetic layer. The magnetic member includes a first magnetic part. A second direction from the first magnetic part to the magnetic element crosses a first direction from the first to second magnetic pole. The first magnetic part includes a magnetic material including at least one of first to third materials. The first material includes at least one selected from the group consisting of Mn3Sn, Mn3Ge and Mn3Ga. The second material includes at least one selected from the group consisting of a cubic or tetragonal compound including Mn and Ni, a cubic alloy including γ-phase Mn, and a cubic alloy including Fe. The third material includes an antiferromagnet.

公开(公告)号：US11508402B1

公开(公告)日：2022-11-22

申请号：US17476966

申请日：2021-09-16

申请人： Western Digital Technologies, Inc.

发明人： Artorn Pokaipisit ,  Krisda Siangchaew ,  Sakthavorn Phongwanitchaya

IPC分类号： G11B5/48 ,  G11B5/21

摘要： Aspects of the present disclosure generally relate to slider assemblies for magnetic heads of magnetic recording devices. In one aspect, a slider assembly for magnetic recording devices includes a slider and an anti-reflection coating (ARC) structure disposed on the slider. The ARC structure includes an outer surface facing away from the slider, and a recess extending into the outer surface to define a recessed surface. The slider assembly includes a soldered structure disposed on the recessed surface and at least partially in the recess of the ARC structure. In one aspect, a method of forming a slider assembly includes forming an anti-reflection coating (ARC) structure on a slider. The ARC structure includes an outer surface facing away from the slider. The method includes forming a recess in the ARC structure, and forming a solder structure on a recessed surface and at least partially in the recess of the ARC structure.

公开(公告)号：US10446178B1

公开(公告)日：2019-10-15

申请号：US16190774

申请日：2018-11-14

申请人： Headway Technologies, Inc.

发明人： Yuhui Tang ,  Ying Liu

IPC分类号： G11B5/127 ,  G11B5/31 ,  G11B5/23 ,  G11B5/48 ,  G11B5/21 ,  G11B5/00

摘要： A microwave assisted magnetic recording (MAMR) writer has a recessed spin flipping element formed in the write gap between the MP tapered trailing side and a first trailing shield, a thickness ≤ to the write gap thickness, and a width ≤ to a maximum width of the MP tapered trailing side. The spin flipping element has a lower non-spin preserving layer, a middle flux guiding layer (FGL), and an upper spin preserving layer. The FGL has a magnetization that flips to a direction substantially anti-parallel to the write gap field when a current of sufficient magnitude is applied from the trailing shield towards the MP thereby increasing reluctance in the write gap and forcing additional flux out of the MP at the air bearing surface to enhance writability and tracks per inch capability on a recording medium while maintaining bits per inch capability compared with conventional MAMR writers.

公开(公告)号：US5691866A

公开(公告)日：1997-11-25

申请号：US604380

申请日：1996-02-21

申请人： Tatsushi Yamamoto

发明人： Tatsushi Yamamoto

IPC分类号： G11B5/10 ,  G11B5/147 ,  G11B5/187 ,  G11B5/21 ,  G11B5/31

CPC分类号： G11B5/1475 ,  G11B5/10 ,  G11B5/21 ,  G11B5/3109 ,  G11B5/3163

摘要： A magnetic head has a magnetic core structured so that soft magnetic thin films and insulating thin films are stacked alternately. In each layer of the soft magnetic thin films, the thickness of the vicinity of a gap portion is made smaller than that of the other portions. According to this structure, it is possible to decrease a magnetic reluctance of the magnetic core. Such magnetic core is formed by repeating, to a substrate having a plurality of grooves formed thereon, the step of forming a thin film by using self-shadowing effects of a peak portion of the groove and the step of applying an anisotropic etching process.

摘要翻译： 磁头具有构造成使得软磁性薄膜和绝缘薄膜交替堆叠的磁芯。 在软磁性薄膜的每层中，使间隙部附近的厚度比其他部分的厚度小。 根据该结构，能够降低磁芯的磁阻。 这样的磁芯是通过使用其上形成有多个凹槽的基板重复利用凹槽的峰部分的自阴影效应和施加各向异性蚀刻工艺的步骤来形成薄膜的步骤。

公开(公告)号：US5402294A

公开(公告)日：1995-03-28

申请号：US122109

申请日：1993-09-16

申请人： Beverley R. Gooch ,  George R. Varian

发明人： Beverley R. Gooch ,  George R. Varian

IPC分类号： G11B5/127 ,  G11B5/147 ,  G11B5/21 ,  G11B5/265 ,  G11B5/42

CPC分类号： G11B5/1475 ,  G11B5/21 ,  Y10T29/49048 ,  Y10T29/49064

摘要： A magnetic transducer for reproducing/recording high frequency signals with a magnetic tape medium includes a pair of opposed transducer head halves separated by an insulation gap and bonded together to form a Y-shaped pole structure, each half including a laminated at least partially ferromagnetic core portion bounded on opposite surfaces with outer and inner conductive layers, each of which forms a winding coil portion. Each core section has a leg portion and an angularly disposed arm portion, the distal end of which is capped with a block-shaped ferromagnetic pole tip in magnetic path relation therewith, the two pole tips lying in a common plane transverse to the plane of the gap. The conductive layers, when conductively interconnected, such as by jumpers, form a one or two turn coil for the transducer. The inner conductor is of an inverted generally U-shaped configuration with the bight portion of the two inner conductors passing through, and substantially filling, the openings of the Y-shape on opposite sides of the insulation gap layer beneath the pole pieces. The method of fabricating the magnetic transducer generally comprises the steps of forming at least two generally identical transducer head halves, each having generally one half of a Y-shape, commencing with providing a substrate having a surface shaped to define the core configuration and having a band shaped to define the pole configurations; applying a conductive layer to the surface for providing an outer coil conductor; alternately applying laminated of insulating and magnetic material to form a laminated core section; applying a conductive layer over an insulation layer about the face and side edges of the laminated core section for providing an inner generally U-shaped coil conductor; forming, in the band, a pole piece of magnetic material at the distal end of the arm of the core section; bonding two such transducer head halves in facing relation to form a Y-shaped transducer with the bonding material being insulating and forming the gap between the two pole pieces.

公开(公告)号：US5253122A

公开(公告)日：1993-10-12

申请号：US784751

申请日：1991-10-30

申请人： Kazunobu Chiba ,  Kenichi Sato ,  Yuichi Arisaka

发明人： Kazunobu Chiba ,  Kenichi Sato ,  Yuichi Arisaka

IPC分类号： G11B5/66 ,  G11B5/008 ,  G11B5/09 ,  G11B5/187 ,  G11B5/21 ,  G11B5/64 ,  G11B5/65 ,  G11B5/73 ,  G11B5/85 ,  G11B20/00 ,  G11B20/14 ,  G11B20/18 ,  H04N5/782 ,  H04N5/7826 ,  H04N5/926 ,  H04N5/783

CPC分类号： G11B5/7305 ,  G11B20/00007 ,  G11B20/1426 ,  G11B20/1813 ,  G11B5/0086 ,  G11B5/09 ,  G11B5/187 ,  G11B5/21 ,  G11B5/85 ,  H04N19/98 ,  H04N5/9261

摘要： A magnetic tape for the recording of digital video signals is constituted by a nonmagnetic base having thereon a magnetic layer of at least one thin magnetic metal film which has an energy product of at least 100 G.cm.Oe, and with the surface roughness of the magnetic tape being at most 0.003 .mu.m in center line average height. Such tape, when used with magnetic heads each having a gap defined between portions of the respective head having a saturation magnetic flux density of at least 14 kG., contribute to the maintenance of an acceptable raw error bit rate below 1.times.10.sup.-4 when recording with a recorded bit area of no more than 1.25 .mu.m.sup.2 /bit.

公开(公告)号：US5239435A

公开(公告)日：1993-08-24

申请号：US674011

申请日：1991-03-25

申请人： Frederick J. Jeffers ,  Neil Smith

发明人： Frederick J. Jeffers ,  Neil Smith

IPC分类号： G11B5/187 ,  G11B5/21 ,  G11B5/31

CPC分类号： G11B5/1872 ,  G11B5/21 ,  G11B5/3143

摘要： A thin film magnetic record/playback head having suitably thin layers of soft, high permeability magnetic material, such as permalloy, electrically insulated from each other by very thin layers of a magnetic material having suitably high resistivity, such as NiZn ferrite. The improved magnetic record/playback head is capable of reading and writing much higher bit densities (up to about 100 kfci) and at much higher frequencies (100 MHz or higher) than prior art devices while remaining fully compatible with existing electronic circuitry.

摘要翻译： 薄膜磁记录/重放头具有适当薄层的柔软，高磁导率磁性材料，例如坡莫合金，通过非常薄的具有适当高电阻率的磁性材料的诸如NiZn铁氧体彼此绝缘。 改进的磁记录/重放头能够读取和写入比现有技术的设备高得多的比特密度（高达约100kfci）和高得多的频率（100MHz或更高），同时与现有的电子电路保持完全兼容。

公开(公告)号：US5170301A

公开(公告)日：1992-12-08

申请号：US762739

申请日：1991-09-18

申请人： Syunsaku Muraoka ,  Etsuko Suzuki ,  Eisuke Sawai

发明人： Syunsaku Muraoka ,  Etsuko Suzuki ,  Eisuke Sawai

IPC分类号： G11B5/187 ,  G11B5/21 ,  G11B5/23

CPC分类号： G11B5/21 ,  G11B5/1878 ,  G11B5/232 ,  Y10T29/49039 ,  Y10T29/49057

摘要： A head core includes a pair of core parts made of a magnetic metallic material and bonded together by (1) a gap material which is a low-melting-point crystallized glass which serves as the bonding material and (2) non-magnetic material layers provided between the glass and the gap surfaces of the core parts. The non-magnetic material layers effectively prevent reaction between the low-melting-point crystallized glass and the metallic magnetic material of the core during the bonding heat treatment. The strength of the magnetic gap, as well as dimensional precision of the same, is enhanced as compared with the conventional arrangement of the same gap size in which bonding is accomplished by a low-melting-point non-crystallizable glass, even when the bonding is executed at the same temperature. The invention remarkably improves magnetic head production yields and reliability.

摘要翻译： 头芯包括由磁性金属材料制成的一对芯部，通过（1）作为接合材料的低熔点结晶玻璃的间隙材料和（2）非磁性材料层 设置在玻璃和芯部分的间隙表面之间。 非磁性材料层在接合热处理期间有效地防止低熔点结晶玻璃与芯的金属磁性材料之间的反应。 与通过低熔点不可结晶玻璃进行接合的相同间隙尺寸的常规布置相比，磁隙的强度以及其尺寸精度提高了，即使当接合 在相同的温度下执行。 本发明显着提高了磁头产量和可靠性。

公开(公告)号：US4941064A

公开(公告)日：1990-07-10

申请号：US201397

申请日：1988-05-26

申请人： Takeshi Tottori ,  Hideo Fujiwara ,  Osamu Inagoya

发明人： Takeshi Tottori ,  Hideo Fujiwara ,  Osamu Inagoya

IPC分类号： G11B5/23 ,  G11B5/127 ,  G11B5/21 ,  G11B5/265

CPC分类号： G11B5/127 ,  G11B5/21 ,  G11B5/2655

摘要： In a magnetic head comprising a first and second core halves bonded together defining a magnetic gap, an non-magnetic thin layer is formed on the surface of each core half facing to the magnetic gap using materials which are substantially chemically non-reactive with the component of an amorphous metallic magnetic thin layer of each half and low melting point glass, and low melting point glass thin layer formed on the non-magnetic thin layer made of glass having a melting of point of temperature lower than the crystallization temperature of the amorphous metallic magnetic thin layer.

摘要翻译： 在包括键合在一起形成磁隙的第一和第二半芯的磁头中，使用与组分基本上化学不反应的材料，在每个磁芯半部分面对磁隙的表面上形成非磁性薄层 的每一半的非晶金属磁性薄膜和低熔点玻璃，以及低熔点玻璃薄层，其形成在由玻璃制成的非磁性薄层上，熔点低于非晶态金属的结晶温度 磁性薄层。