公开(公告)号：US06797373B2

公开(公告)日：2004-09-28

申请号：US10187829

申请日：2002-07-05

申请人： Hitoshi Noguchi ,  Nobuo Yamazaki ,  Shinji Saito

发明人： Hitoshi Noguchi ,  Nobuo Yamazaki ,  Shinji Saito

IPC分类号： G11B568

CPC分类号： G11B5/738 ,  G11B5/70 ,  Y10T428/256 ,  Y10T428/26 ,  Y10T428/265

摘要： Provided is a magnetic recording medium ensuring an adequate S/N even in high density magnetic recording, and tending not to electrostatically damage MR heads during recording and reproduction employing MR heads. A magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic metal powder or a ferromagnetic hexagonal ferrite powder and a binder in this order on at least one side of a nonmagnetic support, wherein said nonmagnetic layer comprises 10 to 50 mass parts of carbon black with a mean particle diameter of 10 to 30 nm per 100 mass parts of said nonmagnetic powder, said magnetic layer has a thickness equal to or less than 0.2 &mgr;m, the standard deviation b of the average intensity a of elements due to said ferromagnetic powder as determined by electron-beam microanalysis is 0.03≦b/a≦0.4, and said magnetic layer has a center surface average roughness Ra equal to or less than 5 nm and a ten-point average roughness Rz equal to or less than 50 nm.

摘要翻译： 提供了即使在高密度磁记录中也能确保足够的S / N的磁记录介质，并且在使用MR磁头的记录和再现期间倾向于不静电损坏MR磁头。 一种包含非磁性粉末和粘合剂的非磁性层的磁记录介质，以及在非磁性载体的至少一侧上依次包含强磁性金属粉末或铁磁六角铁氧体粉末和粘合剂的磁性层，其中所述非磁性层 包含10〜50质量份的碳黑，平均粒径为10〜30nm / 100质量份的所述非磁性粉末，所述磁性层的厚度等于或小于0.2μm，平均强度的标准偏差b 由于通过电子束微量分析测定的所述铁磁性粉末的一个元素是0.03 <= b / a <= 0.4，并且所述磁性层具有等于或小于5nm的中心表面平均粗糙度Ra和10点平均 粗糙度Rz等于或小于50nm。

公开(公告)号：US06773783B2

公开(公告)日：2004-08-10

申请号：US10384669

申请日：2003-03-11

申请人： Shinji Saito ,  Hitoshi Noguchi ,  Nobuo Yamazaki

发明人： Shinji Saito ,  Hitoshi Noguchi ,  Nobuo Yamazaki

IPC分类号： G11B582

CPC分类号： G11B5/70 ,  B32B3/02 ,  B32B27/36 ,  Y10T428/24355 ,  Y10T428/2495 ,  Y10T428/31786

摘要： A magnetic recording medium in the form of a disc comprising a polyethylene naphthalate support having provided thereon a magnetic layer comprising ferromagnetic metal fine powder or ferromagnetic hexagonal ferrite fine powder dispersed in a binder, wherein the central plane average surface roughness of the magnetic layer of the magnetic recording medium is 5 nm or less, the thickness variation rate of the disc is 3% or less, and the total thickness of the disc X &mgr;m and the outside diameter of the disc Y mm satisfy the relationship of 0.3≦Y/X≦0.8.

摘要翻译： 一种盘形磁记录介质，包括聚萘二甲酸乙二醇酯载体，其上设置有分散在粘合剂中的铁磁性金属细粉末或铁磁性六方铁氧体细粉末的磁性层，其中磁性层的中心平面平均表面粗糙度 磁记录介质为5nm以下，盘的厚度变化率为3％以下，盘X mum的总厚度和盘Ymm的外径满足0.3 <= Y / X＆LE的关系 ; 0.8。

公开(公告)号：US06690236B2

公开(公告)日：2004-02-10

申请号：US10237720

申请日：2002-09-10

申请人： Shinji Saito

发明人： Shinji Saito

IPC分类号： H03F345

CPC分类号： H03G1/0023 ,  H03F3/45103 ,  H03F2203/45302 ,  H03F2203/45352 ,  H03F2203/45398 ,  H03F2203/45702

摘要： By a gain control circuit which has: a first differential input circuit comprising a differential pair of transistors Tr1 and Tr3 in which transistors Tr2 and Tr4 connected to diodes are inserted; a second differential input circuit comprising a pair of the transistor Tr3 and a transistor Tr5; and a current source circuit comprising a transistor Tr6 and an emitter resistor R3, and to which first to third individual control input signals VCLS1 to VCLS3 each having a predetermined inclination and an offset value, obtained by shifting the level of a control input signal VCNT are supplied, gain control signals VAGC having a linear characteristic, a monotone increase characteristic of which curve opens upwards, and a monotone increase characteristic of which curve opens sharply upwards are supplied in accordance with a monotone increase region of which curve opens upwards, a linear region, and a monotone increase region of which curve opens downwards, respectively, of a differential pair of transistors Tr11 and Tr12 and a differential pair of transistors Tr13 and Tr14 at the second stage of a differential amplification circuit.

摘要翻译： 通过一种增益控制电路，该增益控制电路具有：第一差分输入电路，其包括与二极管连接的晶体管Tr2和Tr4插入的晶体管Tr1和Tr3的差分对; 包括一对晶体管Tr3和晶体管Tr5的第二差分输入电路; 以及包括晶体管Tr6和发射极电阻R3的电流源电路，并且通过移位控制输入信号VCNT的电平而获得的具有预定倾斜度的第一至第三单独控制输入信号VCLS1至VCLS3和偏移值， 提供了具有线性特性的曲线增益控制信号VAGC，其曲线向上打开的单调增加特性，并且曲线向上打开的单调增加特性根据曲线向上打开的单调增加区域提供，线性区域 ，并且其单调增加区域分别在差分放大电路的第二级处的晶体管Tr11和Tr12的差分对以及晶体管Tr13和Tr14的差分对向下开口。

公开(公告)号：US06541132B2

公开(公告)日：2003-04-01

申请号：US09892858

申请日：2001-06-28

申请人： Hitoshi Noguchi ,  Shinji Saito ,  Takeshi Harasawa

发明人： Hitoshi Noguchi ,  Shinji Saito ,  Takeshi Harasawa

IPC分类号： G11B5012

CPC分类号： G11B5/70678 ,  G11B5/70 ,  G11B5/70621

摘要： A high-capacity magnetic disk comprises a support, a non-magnetic layer and a magnetic layer having a thickness less than 0.15 &mgr;m and containing ferromagnetic powder selected from fine particles of ferromagnetic metal or fine particles of ferromagnetic hexagonal ferrite dispersed in a binder, and the magnetic disk has a track width less than 5 &mgr;m and can record signals having a bit length less than 0.5 &mgr;m, wherein the ratio of the track width to the average major axis length or tabular diameter of ferromagnetic particles is from 50 to 100, the ratio of the shortest bit length to the average major axis length or tabular diameter of ferromagnetic particles is from 3 to 20, and the thickness of magnetic layer has a variation coefficient of 0.5 or below, expressed in terms of a ratio of the standard deviation to the average thickness of the magnetic layer.

摘要翻译： 高容量磁盘包括支撑体，非磁性层和厚度小于0.15μm的磁性层，并且含有选自铁磁性金属的细颗粒或分散在粘合剂中的铁磁性六角铁氧体的微粒的铁磁性粉末，以及 磁盘具有小于5um的轨道宽度，并且可以记录位长度小于0.5μm的信号，其中轨道宽度与铁磁颗粒的平均长轴长度或平板状直径的比率为50至100， 铁磁颗粒的最短位长与平均长轴长度或平板状直径之比为3〜20，磁性层的厚度变化系数为0.5以下，以标准偏差与 磁性层的平均厚度。

公开(公告)号：US06432503B1

公开(公告)日：2002-08-13

申请号：US09052033

申请日：1998-03-30

申请人： Masahi Aonuma ,  Shinji Saito ,  Hitoshi Noguchi ,  Nobuo Yamazaki

发明人： Masahi Aonuma ,  Shinji Saito ,  Hitoshi Noguchi ,  Nobuo Yamazaki

IPC分类号： G11B5706

摘要： A magnetic recording medium is described, which comprises a support having thereon a magnetic layer comprising a ferromagnetic metal powder dispersed in a binder, which is a magnetic recording medium for recording signals of from 0.17 to 2 G bit/inch2 of areal recording density, wherein the coercive force of said magnetic layer is 1,800 Oe or more, said ferromagnetic metal powder comprises Fe and Co, and the atomic ratio of Al/(Fe+Co) is from 3.0 to 15.4%.

公开(公告)号：US06254964B1

公开(公告)日：2001-07-03

申请号：US09267929

申请日：1999-03-08

申请人： Shinji Saito ,  Hitoshi Noguchi ,  Nobuo Yamazaki ,  Junichi Nakamikawa

发明人： Shinji Saito ,  Hitoshi Noguchi ,  Nobuo Yamazaki ,  Junichi Nakamikawa

IPC分类号： G11B0570

CPC分类号： G11B5/71 ,  G11B5/70 ,  G11B5/714 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/265

摘要： A magnetic recording medium is disclosed, which comprises a support having thereon a substantially nonmagnetic lower layer and a magnetic layer comprising a ferromagnetic metal powder or a ferromagnetic hexagonal ferrite powder dispersed in a binder formed on the lower layer, which is a magnetic recording medium for recording signals having areal recording density of from 0.17 to 2 G bit/inch2, wherein the coercive force of the magnetic layer is 1,800 Oe or more, the average long axis length of the ferromagnetic metal powder is 0.15 &mgr;m or less, and the average particle size of the ferromagnetic hexagonal ferrite powder is 0.10 &mgr;m or less; or wherein the dry thickness of the magnetic layer is from 0.05 to 0.30 &mgr;m, &phgr;m is from 10.0×10−3 to 1.0×10−3 emu/cm2, and the coercive force of the magnetic layer is 1,800 Oe or more. The object of the present invention is to provide a magnetic recording medium which is markedly improved in electromagnetic characteristics, particularly, high density recording characteristics, and is excellent in durability: and to provide a high capacity magnetic recording medium, in particular, a disc-like magnetic recording medium, having a high recording capacity of from 0.17 to 2 Gbit/inch2.

摘要翻译： 公开了一种磁记录介质，其包括其上具有基本上非磁性的下层的支撑体和包含分散在形成在下层上的粘合剂中的铁磁性金属粉末或铁磁性六角铁氧体粉末的磁性层，所述粘合剂是用于 具有0.17〜2G比特/英寸2的面密度记录密度的记录信号，其中磁性层的矫顽力为1800Oe以上，强磁性金属粉末的平均长轴长度为0.15μm以下，平均粒子 铁磁六角铁氧体粉末的尺寸为0.10μm以下; 或其中磁性层的干厚度为0.05至0.30μm，phim为10.0×10 -3至1.0×10 -3 emu / cm 2，并且磁性层的矫顽力为1800Oe以上。 本发明提供一种在电磁特性，特别是高密度记录特性方面显着提高的磁记录介质，并且耐久性优异：并提供高容量磁记录介质，特别是提供一种盘状磁记录介质 具有0.17至2Gbit / inch2的高记录容量。

公开(公告)号：US06252894B1

公开(公告)日：2001-06-26

申请号：US09263213

申请日：1999-03-05

申请人： Katsunobu Sasanuma ,  Shinji Saito ,  Genichi Hatakoshi ,  Kazuhiko Itaya ,  Masaaki Onomura ,  Risa Sugiura ,  Mikio Nakasuji ,  Hidetoshi Fujimoto ,  Masahiro Yamamoto ,  Shinya Nunoue

发明人： Katsunobu Sasanuma ,  Shinji Saito ,  Genichi Hatakoshi ,  Kazuhiko Itaya ,  Masaaki Onomura ,  Risa Sugiura ,  Mikio Nakasuji ,  Hidetoshi Fujimoto ,  Masahiro Yamamoto ,  Shinya Nunoue

IPC分类号： H01S500

CPC分类号： H01S5/32341 ,  H01S5/0213 ,  H01S5/0655 ,  H01S5/2004 ,  H01S5/205 ,  H01S5/2219 ,  H01S5/222 ,  H01S5/2231 ,  H01S2301/18

摘要： A semiconductor laser is formed of gallium nitride series compound semiconductor and has a double hetero structure including an MQW (multiple quantum well) active layer held between p-type and n-type AlGaN clad layers. The double hetero structure is held between p-type and n-type contact layers. An InGaN optical absorption layer having an optical absorption coefficient larger than the clad layer which has the same conductivity type as the contact layer and is formed adjacent to the contact layer is formed in at least one of the contact layers and an InAlGaN optical guided mode control layer (layer of small refractive index) having an refractive index smaller than the clad layer is formed on the exterior of the optical absorption layer.

摘要翻译： 半导体激光器由氮化镓系化合物半导体形成，具有包含保持在p型和n型AlGaN覆盖层之间的MQW（多量子阱）有源层的双异质结构。 双异质结构保持在p型和n型接触层之间。 在至少一个接触层和InAlGaN光学引导模式控制中形成具有大于具有与接触层相同的导电类型并且与接触层相邻的覆盖层的光吸收系数的InGaN光吸收层 在光吸收层的外部形成折射率小于包层的层（小折射率层）。

公开(公告)号：US06210775B1

公开(公告)日：2001-04-03

申请号：US09434276

申请日：1999-11-03

申请人： Kiyomi Ejiri ,  Hiroo Inaba ,  Shinji Saito ,  Satoru Hayakawa

发明人： Kiyomi Ejiri ,  Hiroo Inaba ,  Shinji Saito ,  Satoru Hayakawa

IPC分类号： G11B566

CPC分类号： G11B5/848 ,  G11B5/70 ,  G11B5/716 ,  G11B5/733 ,  G11B5/738 ,  G11B5/842 ,  Y10S428/90 ,  Y10T428/12472 ,  Y10T428/24355 ,  Y10T428/24942 ,  Y10T428/25 ,  Y10T428/253 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/258 ,  Y10T428/259 ,  Y10T428/265 ,  Y10T428/269 ,  Y10T428/31551 ,  Y10T428/31721 ,  Y10T428/31855

摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having provided thereon at least a lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and an upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which has been coated on said lower non-magnetic layer while the lower non-magnetic layer is wet, wherein the upper magnetic layer has an average dry thickness (d) of not more than 1.0 &mgr;m and an average thickness variation (&Dgr;d) at the interface between the upper magnetic layer and lower non-magnetic layer is not more than d/2. The magnetic recording medium exhibits excellent electromagnetic characteristics, running properties, and durability.

摘要翻译： 公开了一种磁记录介质，其包括非磁性载体，其上至少设置有包含分散有非磁性粉末的粘结剂的至少一个下部非磁性层，以及包括分散有铁磁性粉末的粘合剂的上磁性层， 已经涂覆在所述下部非磁性层上，而较低的非磁性层是湿的，其中上部磁性层具有不大于1.0μm的平均干燥厚度（d）和界面处的平均厚度变化（DELTAd） 上层磁性层和下层非磁性层之间的距离不大于d / 2。 磁记录介质表现出优异的电磁特性，运行性能和耐久性。

公开(公告)号：US6096406A

公开(公告)日：2000-08-01

申请号：US113474

申请日：1998-07-10

申请人： Nobuo Yamazaki ,  Shinji Saito

发明人： Nobuo Yamazaki ,  Shinji Saito

IPC分类号： G11B5/70 ,  G11B5/708 ,  G11B5/714 ,  G11B5/716 ,  G11B5/738

CPC分类号： G11B5/708 ,  G11B5/70 ,  G11B5/714 ,  G11B5/716 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24975 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265

摘要： A magnetic recording medium is described, which comprises a support having thereon in this order from the support side a substantially nonmagnetic lower layer and a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein the magnetic layer has a coercive force of 1,800 Oe or more, central plane average surface roughness (Ra) of 5.0 nm or less, and the magnetic layer contains a diamond fine particle having an average particle size of from 0.10 to 1.0 .mu.m in an amount of from 0.01 to 5% by weight based on the ferromagnetic powder.

摘要翻译： 描述了一种磁记录介质，其包括从支撑侧依次具有基本上非磁性的下层和包含分散在粘合剂中的铁磁性粉末的磁性层的支撑体，其中磁性层具有1,800Oe的矫顽力或 更优选的是，中心面平均表面粗糙度（Ra）为5.0nm以下，磁性层含有平均粒径为0.10〜1.0μm的金刚石微粒，其量为0.01〜5重量％，基于 铁磁粉末。

公开(公告)号：US5976882A

公开(公告)日：1999-11-02

申请号：US249167

申请日：1999-02-12

申请人： Satoru Satake ,  Takaharu Kameoka ,  Yukio Hosaka ,  Takeshi Imai ,  Shinji Saito

发明人： Satoru Satake ,  Takaharu Kameoka ,  Yukio Hosaka ,  Takeshi Imai ,  Shinji Saito

IPC分类号： G01N21/27 ,  G01N21/33 ,  G01N21/35 ,  G01N21/3563 ,  G01N21/359 ,  G01N33/02

CPC分类号： G01N21/33 ,  G01N21/274 ,  G01N21/3563 ,  G01N21/359 ,  G01N33/02 ,  Y10T436/10

摘要： A method for measuring ash content of food stuff is carried out by 1) preparing, with respect to food stuff samples whose ash content values are known, a calibration curve by a non-linear analysis of absorbance values and the known ash content of each sample, the absorbance values being obtained by irradiating light having particular wavelengths containing at least an ultraviolet ray band wavelength, the particular wavelength being specific to organic ingredients well coupled to inorganic ingredients which result in the ash content, and 2) deriving, with respect to a sample whose ash content value is unknown, an ash content value of the sample from absorbance values obtained by irradiating, on the sample, light having the particular wavelengths containing at least the ultraviolet ray band wavelength and from the calibration curve prepared in advance by the non-linear analysis. An apparatus for carrying out the method includes a light source section, a photo detecting section, a storing section for storing the calibration curve, and a calculation section for calculating, with respect to a sample whose ash content value is unknown, the ash content value based on the absorbance values and the calibration curve stored in the storing section. It is possible to speed up the measuring operation and to improve the measuring precision.

摘要翻译： 通过以下方式进行食品灰分含量测定的方法：1）对于灰分含量已知的食品样品，通过吸光度值的非线性分析和每个样品的已知灰分含量制备校准曲线 通过照射具有至少具有紫外线波长的特定波长的光获得的吸光度值，该特定波长特异于有机成分，其与无机成分良好耦合，导致灰分含量，以及2）相对于 灰分含量未知的样品，样品的灰分含量值，其通过在样品上照射具有至少包含紫外线波段波长的特定波长的光和由非预定制备的校准曲线获得的吸光度值， 线性分析。 用于执行该方法的装置包括光源部分，光检测部分，用于存储校准曲线的存储部分，以及计算部分，用于相对于灰分含量值未知的样本计算灰分含量值 基于存储部分中存储的吸光度值和校准曲线。 可以加快测量操作，提高测量精度。