公开(公告)号：US06791803B2

公开(公告)日：2004-09-14

申请号：US10218569

申请日：2002-08-15

Applicant: Shinji Saito ,  Nobuo Yamazaki ,  Hitoshi Noguchi

Inventor： Shinji Saito ,  Nobuo Yamazaki ,  Hitoshi Noguchi

IPC: G11B502

CPC classification number: G11B5/714 ,  G11B5/70 ,  G11B5/70678 ,  Y10T428/257

Abstract: Provided are a method of magnetic recording and reproducing capable of permitting high density recording on magnetic recording media even under the condition of high data transfer rates and yielding adequate recording and reproduction characteristics when an MR head is used in reproduction, and a magnetic recording medium capable of being used in this magnetic recording and reproducing method. The magnetic recording and reproducing method is a method for reproducing a signal magnetically recorded on a magnetic recording medium with a magnetoresistive (MR) head. The magnetic recording medium comprises a substantially nonmagnetic lower layer and a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder in this order on at least one side of a nonmagnetic support, in which said hexagonal ferrite ferromagnetic powder has a mean plate diameter ranging from 15 to 40 nm and a mean plate thickness ranging from 4 to 15 nm, and said magnetic layer has a coercive force Hc ranging from 143.3 to 318.4 kA/m, and said signal magnetically recorded has a maximum recording frequency ranging from 10 to 80 MHz.

Abstract translation: 提供了一种磁记录和再现方法，即使在高数据传输速率的条件下也能够在磁记录介质上进行高密度记录，并且当在再现中使用MR磁头时产生足够的记录和再现特性，以及能够使用磁记录介质 被用于这种磁记录和再现方法中。 磁记录和再现方法是一种利用磁阻（MR）磁头再现磁记录在磁记录介质上的信号的方法。 磁记录介质在非磁性载体的至少一侧上依次包括基本上非磁性的下层和包含六方铁素体铁磁粉末和粘合剂的磁性层，其中所述六方晶系铁氧体铁磁粉末的平均板直径范围为 15至40nm，平均板厚度范围为4至15nm，所述磁性层的矫顽力Hc为143.3至318.4kA / m，磁性记录的所述信号具有10至80MHz的最大记录频率 。

公开(公告)号：US06703106B2

公开(公告)日：2004-03-09

申请号：US10126616

申请日：2002-04-22

Applicant: Hitoshi Noguchi ,  Takeshi Harasawa ,  Shinji Saito

Inventor： Hitoshi Noguchi ,  Takeshi Harasawa ,  Shinji Saito

IPC: G11B502

CPC classification number: G11B5/7085 ,  G11B5/00 ,  G11B5/70605 ,  G11B5/70678 ,  G11B2005/0016 ,  Y10T428/115 ,  Y10T428/25

Abstract: A magnetic recording and reproducing method comprising recording and reproducing a signal with a magnetic head in a track width (A) of less than 5 &mgr;m on a magnetic recording medium comprising a support having provided thereon a magnetic layer containing at least a ferromagnetic powder, an abrasive and a binder, wherein the average longer size (B) of the abrasive particle(s) which are present on the magnetic layer surface is ⅓ or less of the track width (A).

Abstract translation: 一种磁记录和再现方法，包括在磁记录介质上记录和再现具有小于5μm的磁道宽度（A）的磁头的信号，所述磁记录介质包括其上设置有至少含有铁磁性粉末的磁性层的支撑体， 研磨剂和粘合剂，其中存在于磁性层表面上的磨料颗粒的平均较长尺寸（B）为轨道宽度（A）的1/3或更小。

公开(公告)号：US06590836B1

公开(公告)日：2003-07-08

申请号：US09669454

申请日：2000-09-25

Applicant: Atsushi Yamaguchi ,  Hitoshi Noguchi ,  Hiroki Ishida

Inventor： Atsushi Yamaguchi ,  Hitoshi Noguchi ,  Hiroki Ishida

IPC: G11B1100

CPC classification number: G11B11/10593 ,  G11B11/10582 ,  G11B11/10584

Abstract: On a dielectric layer of SiN a reproduction layer, a non-magnetic layer of SiN and a recording layer of TbFeCo are formed to provide a magneto optical recording medium. The reproduction layer is formed of a first layer corresponding to a Gd layer, a second layer formed of GdFeCo and a third layer corresponding to a Gd layer. As such, the magneto optical recording medium, with the non-magnetic layer formed in contact with the reproduction layer, can prevent the non-magnetic layer from affecting the reproduction layer and thus prevent the reproduction layer from having a degraded characteristic.

Abstract translation: 在SiN的介质层上形成再生层，形成SiN的非磁性层和TbFeCo的记录层，以提供磁光记录介质。 再现层由对应于Gd层的第一层，由GdFeCo形成的第二层和对应于Gd层的第三层形成。 因此，具有与再现层接触的非磁性层的磁光记录介质可以防止非磁性层影响再现层，从而防止再现层具有劣化的特性。

公开(公告)号：US06483783B1

公开(公告)日：2002-11-19

申请号：US09713034

申请日：2000-11-16

Applicant: Kenichiro Mitani ,  Naoyuki Takagi ,  Hitoshi Noguchi ,  Hiroki Ishida ,  Atsushi Yamaguchi ,  Morio Nakatani

Inventor： Kenichiro Mitani ,  Naoyuki Takagi ,  Hitoshi Noguchi ,  Hiroki Ishida ,  Atsushi Yamaguchi ,  Morio Nakatani

IPC: G11B1100

CPC classification number: G11B11/10595 ,  G11B11/10515 ,  G11B11/10543 ,  G11B11/1055

Abstract: A magnetic head is configured of a core and a coil wound around the core and passing current through the coil in a variable direction allows the core to have an edge generating an alternating magnetic field Hex1 and another edge generating an alternating magnetic field Hex2. Alternating magnetic fields Hex1 and Hex2 are applied to the respective edges. Furthermore, a laser beam LB1 is directed such that its optical axis L01 matches the edge receiving the alternating magnetic field Hex1, and a laser beam LB2 is directed such that its optical axis L02 matches the edge receiving the alternating magnetic field Hex2. A first magneto-optical signal detected through the alternating magnetic field Hex1 and the laser beam LB1 and a second magneto-optical signal detected through the alternating magnetic field Hex2 and the laser beam LB2 are composited together. As such, an alternating magnetic field can be applied to a magneto-optical recording medium at a predetermined angle to an in-plane direction of the recording medium to accurately enlarge a magnetic domains for reproduction.

Abstract translation: 磁头由铁芯和缠绕在磁芯上的线圈构成，并且使电流沿可变方向通过线圈允许磁芯具有产生交变磁场Hex1的边缘，另一边产生交变磁场Hex2。 交替磁场Hex1和Hex2被施加到相应的边缘。 此外，激光束LB1被引导为使得其光轴L01与接收交变磁场Hex1的边缘匹配，并且激光束LB2被引导为使得其光轴L02与接收交变磁场Hex2的边缘匹配。 通过交变磁场Hex1和激光束LB1检测到的第一磁光信号和通过交变磁场Hex2和激光束LB2检测的第二磁光信号被合成在一起。 这样，可以将交变磁场以与记录介质的面内方向成预定角度的方式施加到磁光记录介质，以精确地放大用于再现的磁畴。

公开(公告)号：US6037030A

公开(公告)日：2000-03-14

申请号：US46591

申请日：1998-03-24

Applicant: Hitoshi Noguchi ,  Junichi Nakamigawa ,  Shinji Saito

Inventor： Hitoshi Noguchi ,  Junichi Nakamigawa ,  Shinji Saito

IPC: G11B5/706 ,  G11B5/70 ,  G11B5/714 ,  G11B5/738 ,  G11B5/82

CPC classification number: G11B5/70 ,  G11B5/714 ,  Y10T428/256 ,  Y10T428/265

Abstract: A disc-like magnetic recording medium is disclosed, which comprises a support having thereon a magnetic layer comprising a ferromagnetic powder and a binder as main components, wherein the ferromagnetic powder has an average long axis length of from 0.01 to 0.18 .mu.m, a crystallite size of from 50 to 180 .ANG., an acicular ratio of from 2 to 9, the magnetic layer has the coercive force Hc of from 1,700 to 3,000 Oe, the in-plane orientation ratio of 0.85 or more, and the squareness ratio in the vertical direction to the surface of the magnetic layer of 0.30 or less.

Abstract translation: 公开了一种盘状磁记录介质，其包括其上具有包含铁磁粉末和粘合剂作为主要成分的磁性层的载体，其中铁磁粉末的平均长轴长度为0.01至0.18μm，微晶 尺寸为50〜180安培，针状比为2〜9，磁性层的矫顽力Hc为1700〜3000Oe，面内取向率为0.85以上，垂直方向的垂直度 磁性层表面的方向为0.30以下。

公开(公告)号：US5935674A

公开(公告)日：1999-08-10

申请号：US886468

申请日：1997-07-01

Applicant: Shinji Saito ,  Hitoshi Noguchi ,  Yasushi Endo

Inventor： Shinji Saito ,  Hitoshi Noguchi ,  Yasushi Endo

IPC: G11B5/70 ,  G11B5/73 ,  G11B5/82

CPC classification number: G11B5/70 ,  G11B5/7305 ,  Y10S428/90 ,  Y10T428/24355

Abstract: The present invention provides a disc magnetic recording medium which provides remarkable improvements in electromagnetic characteristics, particularly high density recording properties, and exhibits excellent magnetic properties with various sizes. A disc type magnetic recording medium is disclosed, comprising a substantially non-magnetic layer and a magnetic layer provided on a non-magnetic support in this order, said magnetic layer comprising a ferromagnetic metal fine powder or ferromagnetic hexagonal ferrite fine powder dispersed in a binder, wherein said non-magnetic support is an aramide or polyethylene naphthalate having a central plane average surface roughness SRa of not more than 10 mm and there is the following relationship between the thickness d (.mu.m) of the non-magnetic support and the outermost diameter D (mm) of the recording area:1.25.ltoreq.D/d.ltoreq.2.50 (when the non-magnetic support is an aramide)1.00.ltoreq.D/d.ltoreq.2.00 (when the non-magnetic support is a polyethylene naphthalate)

Abstract translation: 本发明提供一种盘式磁记录介质，其提供了电磁特性，特别是高密度记录性能方面的显着改进，并表现出优异的各种尺寸的磁特性。 公开了一种盘式磁记录介质，其包括基本上非磁性层和设置在非磁性载体上的磁性层，所述磁性层包含分散在粘合剂中的铁磁性金属细粉末或铁磁六方铁氧体细粉末 其中所述非磁性载体是中心平面平均表面粗糙度SRa不超过10mm的芳族聚酰胺或聚萘二甲酸乙二醇酯，并且非磁性载体的厚度d（μm）与最外层 记录区域的直径D（mm）：1.25

公开(公告)号：US5601916A

公开(公告)日：1997-02-11

申请号：US524680

申请日：1995-09-07

Applicant: Nobuo Yamazaki ,  Hitoshi Noguchi ,  Shinji Saito

Inventor： Nobuo Yamazaki ,  Hitoshi Noguchi ,  Shinji Saito

IPC: C09D5/23 ,  C09D7/12 ,  G11B5/68 ,  G11B5/70 ,  G11B5/706 ,  G11B5/716 ,  G11B5/738

CPC classification number: G11B5/716 ,  G11B5/70 ,  G11B5/70678 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/257 ,  Y10T428/265

Abstract: A magnetic recording medium is described, which comprises a nonmagnetic support having thereon at least one magnetic layer containing ferromagnetic particles dispersed in a binder, wherein the magnetic recording medium has at least one magnetic layer containing at least hexagonal ferrite magnetic particles and the magnetic layer containing the hexagonal ferrite magnetic particles has a coercive force, Hc, of from 1,300 to 5,000 Oe, a ratio of the Hc to an anisotropic magnetic field HK thereof, Hc/HK, of from 0.30 to 1.0, and a squareness ratio of in-plane direction, SQ, of from 0.65 to 1.00.

Abstract translation: 描述了一种磁记录介质，其包括其上具有至少一个含有分散在粘合剂中的铁磁性颗粒的磁性层的非磁性载体，其中该磁记录介质具有至少一个至少含有六方晶系铁氧体磁性颗粒的磁性层和含有 六方晶系铁氧体磁性颗粒的矫顽力Hc为1,300-5,000Oe，Hc与各向异性磁场HK之比Hc / HK为0.30至1.0，平面比为 方向，SQ从0.65到1.00。

公开(公告)号：US5547772A

公开(公告)日：1996-08-20

申请号：US416331

申请日：1995-04-04

Applicant: Shinji Saito ,  Hiroshi Ogawa ,  Takeshi Kakuta ,  Hitoshi Noguchi

Inventor： Shinji Saito ,  Hiroshi Ogawa ,  Takeshi Kakuta ,  Hitoshi Noguchi

IPC: G11B5/706 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/714 ,  G11B5/716 ,  G11B5/66 ,  B32B3/10 ,  B32B5/16

CPC classification number: G11B5/716 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265

Abstract: The present invention is directed to a magnetic recording medium comprising a non-magnetic support having provided thereon a plurality of magnetic layers composed of a lower magnetic layer comprising a ferromagnetic powder and a binder, and an upper magnetic layer comprising a ferromagnetic powder being provided on the lower magnetic layer, wherein the ferromagnetic powder contained in the upper magnetic layer has a length of major axis not longer than 0.30 .mu.m and a crystallite size not larger than 400 .ANG., the upper magnetic layer has a dry thickness of not more than 1.20 .mu.m, and the surface of the upper magnetic layer has a center-line average surface roughness (Ra) not more than 0.015 .mu.m.

Abstract translation: 本发明涉及一种磁记录介质，其包括非磁性载体，其上设置有由包含铁磁性粉末和粘合剂的下部磁性层构成的多个磁性层，以及包含铁磁性粉末的上部磁性层， 所述下磁性层，其中所述上磁性层中所含的铁磁粉末的长轴长度不大于0.30μm，微晶尺寸不大于400，所述上磁性层的干厚度不大于1.20 上磁性层的表面的中心线平均表面粗糙度（Ra）不大于0.015μm。

公开(公告)号：US5403646A

公开(公告)日：1995-04-04

申请号：US47288

申请日：1993-04-19

Applicant: Shinji Saito ,  Hitoshi Noguchi ,  Kazuo Kato

Inventor： Shinji Saito ,  Hitoshi Noguchi ,  Kazuo Kato

IPC: G11B5/70 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/716 ,  G11B5/73 ,  G11B5/00

CPC classification number: G11B5/716 ,  G11B5/7305 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/265 ,  Y10T428/31721 ,  Y10T428/31725 ,  Y10T428/31786

Abstract: Disclosed is a magnetic recording medium which is improved in electromagnetic conversion and running durability which includes a magnetic layer containing a ferromagnetic powder dispersed in a binder on a non-magnetic support, wherein the sum of the elastic modulus in a longer direction of the non-magnetic support and the elastic modulus in a width direction of the non-magnetic support is 1,250 kg/mm.sup.2 or more; an elastic modulus in a longer direction of the magnetic layer is 0.6 to 3.0 times as much as the elastic modulus in the longer direction of the non-magnetic support; and an elastic modulus in a width direction of the magnetic layer is 0.4 to 2.0 times as much as the elastic modulus in the width direction of the non-magnetic support.

Abstract translation: 公开了一种提高电磁转换和运行耐久性的磁记录介质，其包括在非磁性载体上含有分散在粘合剂中的铁磁粉末的磁性层，其中非磁性载体的长度方向上的弹性模量之和， 磁性载体和非磁性载体的宽度方向的弹性模量为1250kg / mm 2以上; 磁性层的长度方向的弹性模量是非磁性载体的长度方向的弹性模量的0.6〜3.0倍， 磁性层的宽度方向的弹性模量为非磁性载体的宽度方向的弹性模量的0.4〜2.0倍。

公开(公告)号：US5326649A

公开(公告)日：1994-07-05

申请号：US857838

申请日：1992-03-26

Applicant: Meguru Kashida ,  Yoshihiko Nagata ,  Hitoshi Noguchi

Inventor： Meguru Kashida ,  Yoshihiko Nagata ,  Hitoshi Noguchi

IPC: G03F1/22 ,  H01L21/027 ,  B32B9/00 ,  G03F9/00

CPC classification number: G03F1/22 ,  Y10T428/161 ,  Y10T428/24488

Abstract: Disclosed is an X-ray transmitting frame-supported membrane of silicon nitride suitable as a mask blank of an X-ray lithographic mask having outstandingly high resistance against irradiation with high-energy radiations and high transmission of light of a wavelength of 633 nm. These very desirable properties are obtained as a consequence of the extremely low content, i.e. 1.0 atomic % or less, of hydrogen in the silicon nitride, which can be achieved as a result of the specific preparation procedure by the CVD method in which the reactant gases are silane or disilane and ammonia in a specified mixing ratio to be reacted under a specified pressure and at a specified temperature.

Abstract translation: 本发明公开了一种适合作为X射线光刻掩模掩模板的氮化硅的X射线透射框架支撑膜，其具有对高能辐照和波长为633nm的高透光率的显着高的抗性。 作为氮化硅中极低含量（即1.0原子％或更少）的氢的结果，可获得这些非常理想的性质，其可以通过CVD方法的具体制备方法来实现，其中反应物气体 是指定混合比例的硅烷或乙硅烷和氨，以在规定的压力和规定的温度下反应。