公开(公告)号：US08643972B2

公开(公告)日：2014-02-04

申请号：US13401884

申请日：2012-02-22

Applicant: Yoshihiro Shiroishi ,  Hiroshi Fukuda ,  Ikuya Tagawa ,  Tomohiro Okada

Inventor： Yoshihiro Shiroishi ,  Hiroshi Fukuda ,  Ikuya Tagawa ,  Tomohiro Okada

IPC: G11B11/00

CPC classification number: G11B5/3146 ,  G11B5/607 ,  G11B2005/0024

Abstract: A magnetic storage apparatus includes a magnetic recording medium, a microwave assisted magnetic recording head at least equipped with a magnetic recording pole that generates a recording magnetic field for writing to the magnetic recording medium and a high-frequency oscillator that generates a high-frequency field, a magnetic reproducing head that reads information from the magnetic recording medium, a signal processing unit that processes a signal written by the magnetic recording head and a signal read by the magnetic reproducing head and a unit that controls clearance between the high-frequency oscillator and the magnetic recording medium. The magnetic storage apparatus has a characteristic that the high-frequency oscillator is not operated except in recording.

Abstract translation: 一种磁存储装置，包括磁记录介质，至少配备有磁记录磁极的微波辅助磁记录头，该记录磁极产生用于向磁记录介质写入的记录磁场和产生高频场的高频振荡器 从磁记录介质读取信息的磁再现头，处理由磁记录头写入的信号的信号处理单元和由磁再现头读出的信号，以及控制高频振荡器和 磁记录介质。 磁存储装置具有除了记录以外高频振荡器不工作的特征。

公开(公告)号：US07450349B2

公开(公告)日：2008-11-11

申请号：US11292575

申请日：2005-12-02

Applicant: Yasutaka Nishida ,  Ikuya Tagawa ,  Masafumi Mochizuki ,  Roger Wood

Inventor： Yasutaka Nishida ,  Ikuya Tagawa ,  Masafumi Mochizuki ,  Roger Wood

IPC: G11B5/39

CPC classification number: G11B5/3146 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315

Abstract: Embodiments of the invention avoid erasure of recorded data by concentrating stray fields on a magnetic head element. According to one embodiment, in a magnetic storage apparatus using a perpendicular recording medium with a soft magnetic under layer, a soft magnetic shield is provided so as to surround the upper parts and sides of magnetic head elements. A distance between the soft magnetic shield and the medium is shorter than that between the soft magnetic shield and the magnetic head element.

Abstract translation: 本发明的实施例通过将杂散场集中在磁头元件上来避免记录数据的擦除。 根据一个实施例，在使用具有软磁下层的垂直记录介质的磁存储装置中，设置软磁屏蔽以包围磁头元件的上部和侧部。 软磁屏蔽和介质之间的距离比软磁屏蔽和磁头元件之间的距离短。

公开(公告)号：US07428115B2

公开(公告)日：2008-09-23

申请号：US11104011

申请日：2005-04-11

Applicant: Takeshi Nakagawa ,  Ikuya Tagawa ,  Atsushi Kikugawa

Inventor： Takeshi Nakagawa ,  Ikuya Tagawa ,  Atsushi Kikugawa

IPC: G11B5/02 ,  G11B5/127

CPC classification number: G11B5/012 ,  G11B5/02 ,  G11B5/03 ,  G11B5/09 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3967 ,  G11B5/4886 ,  G11B2005/0008 ,  G11B2005/001 ,  G11B2005/0013 ,  G11B2005/0016

Abstract: Embodiments of the invention provide a countermeasure against spike noise maintaining the data reliability of a magnetic recording layer. In one embodiment, the magnetic domain state right below and around the read head of the soft magnetic layer in the recording medium is locally and temporarily equalized using the write head, whereby, the effect of the spike noise caused by the magnetic domain boundaries (magnetic domain walls) of the soft magnetic layer on the read waveform is prevented. The read retry action of the magnetic hard disk drive is used as the trigger for the timing of the magnetic field application, thereby shortening the time for the magnetic field application.

Abstract translation: 本发明的实施例提供了针对保持磁记录层的数据可靠性的尖峰噪声的对策。 在一个实施例中，在记录介质中的软磁层的读取头的正下方和周围的磁畴状态使用写入头进行局部和临时的均衡，由此，由磁畴边界（磁性）引起的尖峰噪声的影响 可以防止读取波形上的软磁性层的畴壁）。 使用磁性硬盘驱动器的读取重试动作作为磁场施加的定时的触发，从而缩短磁场施加的时间。

公开(公告)号：US06822831B2

公开(公告)日：2004-11-23

申请号：US10074185

申请日：2002-02-12

Applicant: Shoji Ikeda ,  Yuji Uehara ,  Ikuya Tagawa ,  Naoki Takeguchi ,  Masahiro Kakehi

Inventor： Shoji Ikeda ,  Yuji Uehara ,  Ikuya Tagawa ,  Naoki Takeguchi ,  Masahiro Kakehi

IPC: G11B5147

CPC classification number: H01F10/147 ,  G11B5/3109 ,  H01F10/131 ,  H01F10/138 ,  H01F10/265 ,  Y10S428/90

Abstract: An object of the present invention is to provide a recording head having a magnetic pole simultaneously possessing a high saturation magnetic flux density, a high permeability and a high electric resistivity, and the magnetic pole of the recording head is a polycrystalline film comprising Fe whose content is not less than 57.5 atomic % and not more than 94.5 atomic %; one or more kinds of elements selected from the element group of Al, B, Ga, Si, Ge, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and Rh, whose whole content is not less than 1 atomic % and not more than 15 atomic %; N whose content is not less than 0.5 atomic % and not more than 10 atomic %; and O whose content is not less than 1.5 atomic % and not more than 22.5 atomic %.

Abstract translation: 本发明的目的是提供一种具有同时具有高饱和磁通密度，高磁导率和高电阻率的磁极的记录头，记录头的磁极是包含Fe的多晶膜，其含量 不小于57.5原子％且不大于94.5原子％; 选自Al，B，Ga，Si，Ge，Y，Ti，Zr，Hf，V，Nb，Ta，Cr，Mo，W和Rh的元素组中的一种或多种元素，其全部含量不少于 1原子％以上15原子％以下。 N含量不小于0.5原子％且不大于10原子％; 其含量不小于1.5原子％且不大于22.5原子％。

公开(公告)号：US06813824B2

公开(公告)日：2004-11-09

申请号：US10328542

申请日：2002-12-23

Applicant: Minoru Hasegawa ,  Yoshinori Ohtsuka ,  Yuji Uehara ,  Takashi Sekikawa ,  Hiroshi Maeda ,  Masahiro Kakehi ,  Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Syuji Nishida

Inventor： Minoru Hasegawa ,  Yoshinori Ohtsuka ,  Yuji Uehara ,  Takashi Sekikawa ,  Hiroshi Maeda ,  Masahiro Kakehi ,  Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Syuji Nishida

IPC: G11B5127

CPC classification number: G11B5/313 ,  G11B5/17 ,  G11B5/3163 ,  Y10T29/49034 ,  Y10T29/49041 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052 ,  Y10T29/49073

Abstract: A liquid resist is introduced between adjacent conductive lines of a coil pattern girdling around a magnetic core piece. When the liquid resist is cured, an insulating resin filler can be fixed between the adjacent conductive lines of the coil pattern. An insulating metallic layer is formed to extend over the insulting resin filler and the conductive lines of the coil pattern. Thereafter, the insulating metallic layer is subjected to a flattening grinding treatment until at least a part of the conductive line is exposed at a flattened surface. Of the resist, of a higher fluidity, penetrates in every hole and corner between the adjacent conductive lines, the gap defined between the adjacent conductive lines is fully filled with the insulating material. No voids remain in the gap. The conductive line of the coil can be reliably prevented from corrosion or oxidation. Moreover, a relatively brittle of fragile insulating resin filler is reliably prevented from being subjected to the flattening.

公开(公告)号：US06567239B1

公开(公告)日：2003-05-20

申请号：US09716345

申请日：2000-11-20

Applicant: Minoru Hasegawa ,  Yoshinori Ohtsuka ,  Yuji Uehara ,  Takashi Sekikawa ,  Hiroshi Maeda ,  Masahiro Kakehi ,  Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Syuji Nishida

Inventor： Minoru Hasegawa ,  Yoshinori Ohtsuka ,  Yuji Uehara ,  Takashi Sekikawa ,  Hiroshi Maeda ,  Masahiro Kakehi ,  Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Syuji Nishida

IPC: G11B5147

CPC classification number: G11B5/313 ,  G11B5/17 ,  G11B5/3163 ,  Y10T29/49034 ,  Y10T29/49041 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052 ,  Y10T29/49073

Abstract: A liquid resist is introduced between adjacent conductive lines of a coil pattern girdling around a magnetic core piece. When the liquid resist is cured, an insulating resin filler can be fixed between the adjacent conductive lines of the coil pattern. An insulating metallic layer is formed to extend over the insulting resin filler and the conductive lines of the coil pattern. Thereafter, the insulating metallic layer is subjected to a flattening grinding treatment until at least a part of the conductive line is exposed at a flattened surface. Since the liquid of the resist, of a higher fluidity, penetrates in every hole and corner between the adjacent conductive lines, the gap defined between the adjacent conductive lines is fully filled with the insulating material. No voids remain in the gap. The conductive line of the coil can be reliably prevented from corrosion or oxidation. Moreover, a relatively brittle of fragile insulating resin filler is reliably prevented from being subjected to the flattening grinding treatment.

Abstract translation: 在围绕磁芯片的线圈图案的相邻导线之间引入液体抗蚀剂。 当液体抗蚀剂固化时，可以在线圈图案的相邻导电线之间固定绝缘树脂填料。 绝缘金属层形成为在绝缘树脂填料和线圈图案的导线上延伸。 此后，对绝缘金属层进行平坦化研磨处理，直到导电线的至少一部分在平坦表面露出。 由于具有较高流动性的抗蚀剂的液体渗透在相邻导电线之间的每个孔和拐角处，所以相邻导电线之间限定的间隙被绝缘材料完全充满。 间隙中没有空隙。 可以可靠地防止线圈的导线腐蚀或氧化。 此外，可靠地防止相对脆弱的脆性绝缘树脂填料进行平坦化研磨处理。

公开(公告)号：US6002555A

公开(公告)日：1999-12-14

申请号：US24068

申请日：1998-02-17

Applicant: Ikuya Tagawa

Inventor： Ikuya Tagawa

IPC: G11B5/31 ,  G11B5/39 ,  G11B5/147

CPC classification number: G11B5/3903 ,  G11B5/31 ,  G11B5/313 ,  G11B5/3967 ,  G11B5/3133 ,  G11B5/3146

Abstract: A thin film magnetic head includes an inductive head and an MR head. The resistance of one magnetic shielding layer is higher than the resistance of an opposed shielding layer, to increase the efficiency of the recording magnetic field. In one embodiment, the rear area of the magnetic layer includes a notched portion. In another embodiment, the resistivity of the material in one magnetic layer is increased with respect to the resistivity of the material used in the opposing magnetic layer.

Abstract translation: 薄膜磁头包括感应头和MR头。 一个磁屏蔽层的电阻高于相对的屏蔽层的电阻，以提高记录磁场的效率。 在一个实施例中，磁性层的后部区域包括切口部分。 在另一个实施例中，一个磁性层中的材料的电阻率相对于在相对的磁性层中使用的材料的电阻率增加。

公开(公告)号：US20060139815A1

公开(公告)日：2006-06-29

申请号：US11317192

申请日：2005-12-22

Applicant: Syuji Nishida ,  Yasutaka Nishida ,  Ikuya Tagawa

Inventor： Syuji Nishida ,  Yasutaka Nishida ,  Ikuya Tagawa

IPC: G11B5/33 ,  G11B5/127

CPC classification number: G11B5/3912 ,  G11B5/1278

Abstract: Embodiments of the invention avoid loss of information as recorded, due to an external magnetic field applied. In one embodiment, a pole expanded part prone to occurrence of magnetic saturation is formed so as to prevent magnetic fluxes from being converged at ends of a return pole of a magnetic head.

Abstract translation: 由于施加了外部磁场，本发明的实施例避免了记录的信息丢失。 在一个实施例中，形成容易发生磁饱和的极扩展部分，以防止磁通量在磁头的返回极的端部收敛。

公开(公告)号：US06970324B2

公开(公告)日：2005-11-29

申请号：US10299177

申请日：2002-11-19

Applicant: Shoji Ikeda ,  Takayuki Kubomiya ,  Ikuya Tagawa ,  Yuji Uehara

Inventor： Shoji Ikeda ,  Takayuki Kubomiya ,  Ikuya Tagawa ,  Yuji Uehara

IPC: G11B5/31 ,  G11B5/39 ,  H01F10/16 ,  H01F10/26

CPC classification number: H01F10/26 ,  G11B5/3109 ,  G11B5/313 ,  G11B5/3967 ,  H01F10/16

Abstract: A soft magnetic film includes a ferromagnetic layer. The ferromagnetic layer is laid over a non-magnetic substructure including ferromagnetic atoms. The uniaxial magnetic anisotropy may be established in the ferromagnetic layer. Since a magnetic property is not required in the substructure under the ferromagnetic layer, the soft magnetic film of this type may be utilized for purposes of wider variations.

Abstract translation: 软磁性膜包括铁磁层。 铁磁层铺设在包括铁磁原子的非磁性子结构之上。 可以在铁磁层中建立单轴磁各向异性。 由于在铁磁层下的亚结构中不需要磁性，所以这种类型的软磁膜可以用于较宽的变化。

公开(公告)号：US20050175864A1

公开(公告)日：2005-08-11

申请号：US11071309

申请日：2005-03-04

Applicant: Shoji Ikeda ,  Takayuki Kubomiya ,  Masaaki Matsuoka ,  Ikuya Tagawa ,  Junichi Kane ,  Akifumi Chikazawa ,  Kazumasa Hosono

Inventor： Shoji Ikeda ,  Takayuki Kubomiya ,  Masaaki Matsuoka ,  Ikuya Tagawa ,  Junichi Kane ,  Akifumi Chikazawa ,  Kazumasa Hosono

IPC: G11B5/31 ,  G11B5/147

CPC classification number: G11B5/3109 ,  G11B5/3103 ,  G11B5/3163

Abstract: The present invention relates to a magnetic thin film, which has high saturation magnetic flux density Bs of 2.2T or more, which is formed into a flat surface having surface roughness of 5 nm or less and which is capable of preferably being used for a write-head, and a magnetic head. The magnetic thin film includes a FeCo-based alloy layer stacked with a different layer so as to obtain the surface roughness of 5 nm or less. When forming the FeCo-based alloy layer, it is possible to flatten the film surface by performing reactive spattering using a reaction gas such as N2 for each of the layers forming the multi-layered thin film.

Abstract translation: 本发明涉及具有2.2T以上的高饱和磁通密度Bs的磁性薄膜，其形成为具有5nm以下的表面粗糙度的平坦面，并且能够优选用于写入 头和磁头。 磁性薄膜包括层叠有不同层的FeCo系合金层，以获得5nm以下的表面粗糙度。 当形成FeCo基合金层时，可以通过对形成多层薄膜的各层使用诸如N 2的反应气体进行反应性溅射来使膜表面变平。