公开(公告)号：US07031123B2

公开(公告)日：2006-04-18

申请号：US10660865

申请日：2003-09-11

Applicant: Takayoshi Ohtsu ,  Satoshi Shigematsu ,  Kouji Nishioka ,  Takao Imagawa ,  Kouji Kataoka ,  Masatoshi Arasawa ,  Norifumi Miyamoto

Inventor： Takayoshi Ohtsu ,  Satoshi Shigematsu ,  Kouji Nishioka ,  Takao Imagawa ,  Kouji Kataoka ,  Masatoshi Arasawa ,  Norifumi Miyamoto

IPC: G11B5/39

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/3116 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/3967 ,  G11B2005/3996

Abstract: A magnetoresistive head comprises a free magnetic layer that has first and second free magnetic films sandwiching a non-magnetic intermediate film therebetween, the respective magnetizing directions of the first and the second free magnetic films are antiparallel. The length of the free magnetic layer in the direction of the track width is 200 nm or less, and a difference between a product of saturation magnetic flux density and a film thickness of the first free magnetic film, and that of the second free magnetic film is within a range from 1 to 3 nmT. By this structure, the variation of output and the variation of asymmetry is greatly decreased at a track width of 200 nm or less.

Abstract translation: 磁阻头包括具有夹在其间的非磁性中间膜的第一和第二自由磁性膜的自由磁性层，第一和第二自由磁性膜的各自的磁化方向是反平行的。 自由磁性层在磁道宽度方向上的长度为200nm以下，饱和磁通密度与第一自由磁性膜的膜厚的乘积与第二自由磁性膜的膜厚之差 在1〜3nmT的范围内。 通过这种结构，在200nm或更小的轨道宽度处，输出的变化和不对称性的变化大大降低。

公开(公告)号：US4718053A

公开(公告)日：1988-01-05

申请号：US795313

申请日：1985-11-06

Applicant: Yoshio Sato ,  Satoshai Shimada ,  Hiroshi Sasaki ,  Norifumi Miyamoto ,  Nobuyoshi Tsuboi ,  Hideki Nihei ,  Ryuji Watanabe ,  Atsumi Watanabe ,  Tetsuo Ito ,  Hiroaki Koyanagi

Inventor： Yoshio Sato ,  Satoshai Shimada ,  Hiroshi Sasaki ,  Norifumi Miyamoto ,  Nobuyoshi Tsuboi ,  Hideki Nihei ,  Ryuji Watanabe ,  Atsumi Watanabe ,  Tetsuo Ito ,  Hiroaki Koyanagi

IPC: G11B7/0055 ,  G11B7/013 ,  G11B7/09 ,  G11B7/135 ,  G11B7/24085 ,  G11B7/243 ,  G11B7/257 ,  G11B7/095 ,  G11B7/24

CPC classification number: G11B7/257 ,  G11B7/00557 ,  G11B7/135 ,  G11B7/24085 ,  G11B7/243 ,  G11B2007/13727 ,  G11B2007/24304 ,  G11B2007/24308 ,  G11B7/0909

Abstract: The present invention employs as a recording medium a metal or alloy which exhibits an intercrystalline transition before and after writing. In the present invention, two light beams of unequal wavelengths are used so as to write information with the light beam of the longer wavelength and to erase information with the light beam of the shorter wavelength. In changing a written content, a wavelength with which the reflection rate of the recording medium increases is used.

Abstract translation: 本发明在记录介质之前和之后使用表现出晶间转变的金属或合金作为记录介质。 在本发明中，使用两个不等波长的光束，以便用较长波长的光束写入信息，并用较短波长的光束擦除信息。 在改变书写内容时，使用记录介质的反射率增加的波长。

公开(公告)号：US08940187B2

公开(公告)日：2015-01-27

申请号：US13638021

申请日：2011-03-14

Applicant: Hideki Ohtsubo ,  Shin-Ichi Sakata ,  Shinichi Ishitobi ,  Yasuyuki Ichizono ,  Norifumi Miyamoto ,  Hisayoshi Iba

Inventor： Hideki Ohtsubo ,  Shin-Ichi Sakata ,  Shinichi Ishitobi ,  Yasuyuki Ichizono ,  Norifumi Miyamoto ,  Hisayoshi Iba

IPC: C09K11/80 ,  C09K11/08 ,  H01L33/00 ,  C09K11/77 ,  C04B35/117 ,  C04B35/44 ,  C04B35/65 ,  C04B35/653 ,  H01L33/50 ,  H05B33/14

CPC classification number: C09K11/7716 ,  C04B35/117 ,  C04B35/44 ,  C04B35/652 ,  C04B35/653 ,  C04B2235/3217 ,  C04B2235/3222 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3229 ,  C04B2235/764 ,  C04B2235/80 ,  C09K11/7774 ,  H01L33/502 ,  H01L33/505 ,  H01L2224/48091 ,  H05B33/14 ,  H01L2924/00014

Abstract: Provided are a ceramic composite for light conversion, which is capable of maintaining a high radiant flux even when the proportion of Gd and Ce is increased to tune the fluorescence peak wavelength to the longer wavelength side, a process for producing the ceramic composite, and a light emitting device including the ceramic composite. The ceramic composite for light conversion is a solidification product including a composition that is represented by a specific formula, and has a texture of continuously and three-dimensionally mutually entangled oxide phases including at least two phases of a first phase and a second phase, characterized in that the first phase is a Y3Al5O12 fluorescent phase activated with Ce, and the second phase is an Al2O3 phase, and the first phase and second phase account for 97% by area or more of a cross section of the solidification product, or characterized in that the first phase is a Y3Al5O12 fluorescent phase activated with Gd and Ce, and the second phase is an Al2O3 phase, and the first phase and second phase account for 97% by area or more of a cross section of the solidification product.

Abstract translation: 提供一种用于光转换的陶瓷复合体，其即使当增加Gd和Ce的比例以将荧光峰值波长调谐到较长波长侧时也能够保持高辐射通量，制造陶瓷复合材料的方法和 包括陶瓷复合材料的发光器件。 用于光转化的陶瓷复合材料是一种凝固产物，其包括由特定的化学式表示的组合物，并且具有包括第一相和第二相的至少两相的连续和三维相互缠结的氧化物相的质地，其特征在于 其中第一相是用Ce活化的Y3Al5O12荧光相，第二相是Al2O3相，第一相和第二相占固化产物横截面的97％以上，或者其特征在于 第一相是用Gd和Ce激活的Y3Al5O12荧光相，第二相是Al2O3相，第一相和第二相占固化产物横截面的97％以上。

公开(公告)号：US07230803B2

公开(公告)日：2007-06-12

申请号：US10771312

申请日：2004-02-05

Applicant: Akira Morinaga ,  Koichi Nishioka ,  Takayoshi Ohtsu ,  Norifumi Miyamoto ,  Shuichi Kojima

Inventor： Akira Morinaga ,  Koichi Nishioka ,  Takayoshi Ohtsu ,  Norifumi Miyamoto ,  Shuichi Kojima

IPC: G11B5/39

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996

Abstract: A magneto-resistive effect head including: an antiferromagnetic layer; a pinned layer which is formed on the antiferromagnetic layer and whose magnetizing direction has been fixed; a spacer formed on the pinned layer; a free layer formed on the spacer; and magnetic domain control layers having antiferromagnetic flims and magnet layers for performing a magnetic domain control of the free layer; wherein the each of the antiferromagnetjc films is formed on the free layer; wherein the each of magnet layers has at least two magnetic films coupled anti-ferromagnetically through at least one nonmagnetic film; a pair of lead layers for supplying a current to the stack of layers; and wherein seed layers are formed between the antiferromagnetic films and the lead layers.

Abstract translation: 磁阻效应头包括：反铁磁层; 形成在反铁磁层上并且其磁化方向已被固定的钉扎层; 形成在被钉扎层上的间隔物; 形成在间隔物上的自由层; 以及磁畴控制层，其具有用于对自由层进行磁畴控制的反铁磁性薄膜和磁铁层; 其中每个反铁磁膜形成在自由层上; 其中每个磁体层具有至少两个通过至少一个非磁性膜反铁磁耦合的磁膜; 一对用于向层叠层提供电流的引线层; 并且其中在反铁磁膜和引线层之间形成种子层。

公开(公告)号：US20050046985A1

公开(公告)日：2005-03-03

申请号：US10890073

申请日：2004-07-12

Applicant: Akira Morinaga ,  Yoji Maruyama ,  Hiroshi Ide ,  Norifumi Miyamoto

Inventor： Akira Morinaga ,  Yoji Maruyama ,  Hiroshi Ide ,  Norifumi Miyamoto

IPC: G11B5/455 ,  G11B5/00 ,  G11B5/012 ,  G11B5/60 ,  G11B21/21 ,  G11B27/36 ,  G11B21/02

CPC classification number: G11B5/6005 ,  G11B5/3136 ,  G11B5/607

Abstract: A write head's material having a great thermal expansion coefficient expands due to Joule heat resulting from a write current and a temperature rise dependent on high-frequency core loss, thereby causing the head's flying surface to protrude toward a magnetic disk. This phenomenon is called TPR (thermal protrusion). It is essential that the flying height be accurately determined and managed in consideration of TPR. A magnetic disk drive for actual use or a magnetic disk drive that is in a testing process but similar to the one for actual use is used to measure TPR amount changes resulting from a write operation, store the resulting measured data in a memory or on the magnetic disk, and perform flying height management with the stored measured data. Further, flying height management is performed as needed in conjunction with a SMART function. The present invention makes it possible to perform high-reliability flying height management.

Abstract translation: 具有大的热膨胀系数的写头材料由于写入电流引起的焦耳热和依赖于高频磁芯损耗的温度升高而扩大，从而使磁头的飞行表面朝向磁盘突出。 这种现象称为TPR（热突起）。 考虑到TPR，飞行高度必须准确确定和管​​理至关重要。 用于实际使用的磁盘驱动器或处于测试过程中但类似于实际使用的磁盘驱动器用于测量由写入操作导致的TPR量变化，将得到的测量数据存储在存储器中或在 磁盘，并使用存储的测量数据执行飞行高度管理。 此外，根据需要结合SMART功能执行飞行高度管理。 本发明能够进行高可靠性的飞行高度管理。

公开(公告)号：US5461517A

公开(公告)日：1995-10-24

申请号：US183943

申请日：1994-01-21

Applicant: Mitsuo Suda ,  Kazuo Shiiki ,  Masanori Tanabe ,  Shinji Narishige ,  Eiji Nakanishi ,  Kouichi Shimizu ,  Norifumi Miyamoto ,  Hirotsugu Fukuoka

Inventor： Mitsuo Suda ,  Kazuo Shiiki ,  Masanori Tanabe ,  Shinji Narishige ,  Eiji Nakanishi ,  Kouichi Shimizu ,  Norifumi Miyamoto ,  Hirotsugu Fukuoka

IPC: G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B19/04 ,  G11B5/03

CPC classification number: G11B19/04 ,  G11B5/012 ,  G11B5/02 ,  G11B2005/0008 ,  G11B5/3113

Abstract: In a magnetic disk device having a composite head with an induction type of recording head adjacent a magneto-resistance effect type of reproducing head, a read error relief is provided to relieve read errors caused by Barkhausen Noise or Base Line Shift phenomenon inherent to the magneto-resistance effect type of reproducing head. Upon occurrence of a read error, a re-try function is first executed, and a track offset function is executed for relief of the read error. However, if the read error is not relieved after the offset operation and the re-try operation have been performed a predetermined number of times, then a pseudo write-in and/or read current control operation is performed together with the offset operation and/or re-try operation for a predetermined number of times. The control operation varies the magnetic domain structure in the head magnetic film (MR film). The variation of magnetic field and/or read current in the head magnetic film causes the magnetic domain structure of the head magnetic film to be varied, so that the Barkhausen Noise or the Base Line Shift phenomenon are extinguished.

Abstract translation: 在具有与磁阻效应类型的再现头相邻的具有感应型记录头的复合头的磁盘装置中，提供读取误差缓解以减轻由Barkhausen噪声或基本线移位现象引起的读取误差 电阻效应类型的再现头。 在发生读取错误时，首先执行重试功能，并且执行磁道偏移功能以减轻读取错误。 然而，如果在偏移操作和重试操作已经执行了预定次数之后读取错误不被解除，则伪写入和/或读取电流控制操作与偏移操作和/ 或重新尝试操作预定次数。 控制操作改变磁头磁性膜（MR膜）中的磁畴结构。 头磁性膜中的磁场和/或读取电流的变化导致磁头磁性膜的磁畴结构发生变化，从而使巴克豪森噪声或基线偏移现象消失。

公开(公告)号：US4773060A

公开(公告)日：1988-09-20

申请号：US804163

申请日：1985-12-03

Applicant: Satoshi Shimada ,  Yoshio Sato ,  Hiroshi Sasaki ,  Nobuyoshi Tsuboi ,  Tetsuo Ito ,  Hideki Nihei ,  Norifumi Miyamoto ,  Hiroaki Koyanagi ,  Kanji Kawakami

Inventor： Satoshi Shimada ,  Yoshio Sato ,  Hiroshi Sasaki ,  Nobuyoshi Tsuboi ,  Tetsuo Ito ,  Hideki Nihei ,  Norifumi Miyamoto ,  Hiroaki Koyanagi ,  Kanji Kawakami

IPC: G11B7/00 ,  G11B7/003 ,  G11B7/0055 ,  G11B7/013 ,  G11B7/24 ,  G11B7/243 ,  G11B7/30 ,  G11B11/00 ,  G11B13/00

CPC classification number: G11B7/00454 ,  G11B7/003 ,  G11B7/243 ,  G11B2007/24306 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24312

Abstract: A film of a crystal - crystal phase transformation type optical recording alloy is formed on an insulating substrate. Information is erased from the alloy film by heating it with an expedient other than a laser beam. Information is read by sensing reflected light of light projected on the alloy film.

Abstract translation: 在绝缘基板上形成晶体相变型光学记录合金的膜。 通过加热除了激光束以外的其它方法，从合金膜中消除信息。 通过感测投射在合金膜上的光的反射光来读取信息。