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1. 发明授权

US06797373B2 Magnetic recording medium 有权
标题翻译：磁记录介质
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。

2. 发明授权

US06372325B1 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06372325B1
公开(公告)日：2002-04-16
申请号：US09524757
申请日：2000-03-13
申请人： Kiyomi Ejiri , Koji Naoe , Masatoshi Takahashi
发明人： Kiyomi Ejiri , Koji Naoe , Masatoshi Takahashi
IPC分类号： G11B568
CPC分类号： G11B5/70 , Y10S428/90 , Y10T428/24355
摘要： Disclosed is a magnetic recording medium having a flexible nonmagnetic support, a nonmagnetic layer containing a nonmagnetic powder and a binder on the support, and a magnetic layer containing a ferromagnetic powder and a binder. The magnetic layer has an average thickness d of 0.01 to 0.3 &mgr;m, a ratio &sgr;/d of a standard deviation &sgr; in the thickness of the magnetic layer to the average thickness d equal to or less than 0.5, and, according to the roughness spectrum of a magnetic layer surface measured with an atomic force microscope, a PSD of 0.5 nm2 or lower in a wavelength of 1 to 5 &mgr;m and a PSD of 0.02 to 0.5 nm2 in a wavelength of 0.5 &mgr;m or more to less than 1 &mgr;m.
摘要翻译：公开了一种具有柔性非磁性载体，在载体上含有非磁性粉末和粘合剂的非磁性层以及含有铁磁粉末和粘合剂的磁性层的磁记录介质。磁性层的平均厚度d为0.01〜0.3μm，磁性层的厚度的标准偏差σ与平均厚度d的比值σ/ d等于或小于0.5，根据粗糙度谱使用原子力显微镜测量的磁性层表面，波长为1-5μm的0.5nm2以下的PSD，波长为0.5μm以上且小于1μm的PSD为0.02〜0.5nm 2。

3. 发明授权

US06233121B1 Magnetic disk drive suspension pitch motion limiter 有权
标题翻译：磁盘驱动器悬架俯仰运动限幅器
公开(公告)号：US06233121B1
公开(公告)日：2001-05-15
申请号：US09289473
申请日：1999-04-09
申请人： Tzong-Shii Pan
发明人： Tzong-Shii Pan
IPC分类号： G11B568
CPC分类号： G11B5/4826
摘要： A suspension assembly with a pitch motion limiter, for a magnetic disk drive. The suspension comprises a load beam having a load/unload cam follower at a distal end, and having a load gimbal; a flexure mounted on the load beam, the flexure having a free end adjacent the load gimbal, and the flexure having a gimbal surface facing the load gimbal and having a head slider mounting surface opposite the gimbal surface for mounting a head slider having a trailing edge; and a pitch limiter for limiting the maximum pitch motion of the flexure free end with respect to the load beam. The pitch limiter comprises a pair of tabs on the load beam at opposite sides of, and aligned with, the load gimbal, and the tabs projecting in a direction perpendicular to the head slider trailing edge, and a pair of frames on the flexure at opposite sides of the load gimbal, each of the frames aligned with and completely surrounding a corresponding one of the tabs. The frames are substantially parallel to the trailing edge of the head slider.
摘要翻译：一种具有俯仰运动限制器的悬架组件，用于磁盘驱动器。悬架包括负载梁，其在远端具有装载/卸载凸轮从动件，并且具有负载万向节; 安装在负载梁上的挠曲件，挠曲件具有靠近负载万向架的自由端，并且挠曲件具有面向负载万向架的万向节表面，并且具有与万向节表面相对的磁头滑块安装表面，用于安装具有后缘的磁头滑块 ; 以及用于限制挠曲自由端相对于负载梁的最大俯仰运动的音调限制器。音调限制器包括在负载梁上的与负载万向架相对的两侧的一对突片，并且与负载万向架对准并且与垂直于磁头滑动器后缘的方向突出的凸片以及在相对的挠性件上的一对框架负载万向节的侧面，每个框架对准并完全围绕对应的一个突出部。框架基本上平行于头部滑块的后缘。

4. 发明授权

US06759150B2 Magnetic recording medium comprising urethane binder of specific Tg 有权
标题翻译：包含特定Tg的聚氨酯粘合剂的磁记录介质
公开(公告)号：US06759150B2
公开(公告)日：2004-07-06
申请号：US10024993
申请日：2001-12-18
申请人： Masaki Suzuki , Hiroaki Takano , Masanosuke Kunikata
发明人： Masaki Suzuki , Hiroaki Takano , Masanosuke Kunikata
IPC分类号： G11B568
CPC分类号： G11B5/7021 , G11B5/70621 , G11B5/738
摘要： A magnetic recording medium includes: a non-magnetic support; a lower non-magnetic layer; and a magnetic layer containing a ferromagnetic powder and a binder, in this order, wherein the magnetic layer has a coercive force of 2,500 to 3,500 oersted (197.5 to 276.5 kA/m), and a squareness ratio of 0.70 to 0.85 in a length direction thereof, and the binder in the magnetic layer is a urethane resin having a glass transition temperature Tg of 70° C. or higher.
摘要翻译：磁记录介质包括：非磁性载体; 较低的非磁性层; 以及含有铁磁性粉末和粘合剂的磁性层，其中磁性层的矫顽力为2500〜3,500奥斯特（197.5〜276.5kA / m），长度方向的矩形比为0.70〜0.85 并且磁性层中的粘合剂是玻璃化转变温度Tg为70℃以上的聚氨酯树脂。

5. 发明授权

US06652999B2 Magnetic recording medium and signal recording system comprising at least two magnetic layers with orthogonally oriented axes 有权
标题翻译：磁记录介质和信号记录系统包括具有正交取向轴的至少两个磁性层
公开(公告)号：US06652999B2
公开(公告)日：2003-11-25
申请号：US09951392
申请日：2001-09-14
申请人： Kiyomi Ejiri , Minoru Sueki , Tsutomu Sugisaki
发明人： Kiyomi Ejiri , Minoru Sueki , Tsutomu Sugisaki
IPC分类号： G11B568
CPC分类号： G11B5/716 , Y10T428/265
摘要： A magnetic recording medium comprising two or more magnetic layers provided on a support, wherein an easily magnetizable axis of an uppermost magnetic layer and an easily magnetizable axis of a lower magnetic layer are oriented in directions crossing each other at right angles, which can attain both a highly precise servo write and a higher recording density.
摘要翻译：一种磁记录介质，包括设置在支撑体上的两个或多个磁性层，其中最上层的磁性层的容易磁化的轴线和下部磁性层的容易磁化的轴线沿垂直方向交叉的方向取向，高精度的伺服写入和更高的记录密度。

6. 发明授权

US06475598B1 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06475598B1
公开(公告)日：2002-11-05
申请号：US09602225
申请日：2000-06-23
申请人： Koji Naoe , Kiyomi Ejiri , Masahiko Mori
发明人： Koji Naoe , Kiyomi Ejiri , Masahiko Mori
IPC分类号： G11B568
CPC分类号： B82Y15/00 , G11B5/7085 , G11B5/7305 , G11B5/738 , Y10S428/90 , Y10T428/24355 , Y10T428/24975 , Y10T428/25 , Y10T428/265
摘要： The present invention provides a magnetic recording medium exhibiting a high C/N ratio as well as having excellent running durability even under high-density magnetic recording. Disclosed is a magnetic recording medium comprising, on either side of a flexible nonmagnetic support, a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order, having an average thickness of said magnetic layer of from 0.01 to 0.3 &mgr;m and a total average thickness of said magnetic layer and said nonmagnetic layer of from 0.1 to 1.0 &mgr;m, characterized in that the number of projections having a height equal to or higher than 20 nm on the magnetic layer surface measured with AFM (Atomic Force Microscope) is equal to or less than 100 pieces per 30 &mgr;m×30 &mgr;m square as well as the PSD (Power Spectrum Density) of the magnetic layer surface measured with the AFM is equal to or less than 0.2 nm2 in the wavelength of from of 1 to 5 &mgr;m.
摘要翻译：本发明提供了一种表现出高C / N比的磁记录介质，并且即使在高密度磁记录下也具有优异的运行耐久性。公开了一种磁记录介质，其在柔性非磁性载体的任一侧上包含非磁性层含有非磁性粉末和粘合剂以及含有铁磁性粉末和粘合剂的磁性层，所述磁性层的平均厚度为0.01〜0.3μm，所述磁性层和所述非磁性层的总平均厚度为 0.1〜1.0μm，其特征在于，使用AFM（原子力显微镜）测定的磁性层表面上的高度等于或大于20nm的突起的数量等于或小于每30mum×30μm的正方形100个以及用AFM测量的磁性层表面的PSD（功率谱密度）在1至5的波长中等于或小于0.2nm 2 妈妈

7. 发明授权

US06436522B2 Process for the preparation of a magnetic dispersion for magnetic recording media and magnetic recording media produced therewith 失效
标题翻译：用于制备用于磁记录介质的磁性分散体和由其制备的磁记录介质的方法
公开(公告)号：US06436522B2
公开(公告)日：2002-08-20
申请号：US09782763
申请日：2001-02-14
申请人： Axel Schünemann , Hans-Dieter Zettler , Peter Nagel
发明人： Axel Schünemann , Hans-Dieter Zettler , Peter Nagel
IPC分类号： G11B568
CPC分类号： B29B7/90 , B01F7/00708 , B01F11/0057 , B01F2215/0481 , B29B7/36 , B29B7/44 , G11B5/70 , G11B5/842 , Y10S428/90 , Y10T428/25
摘要： A process for the preparation of high-quality magnetic dispersions having an Hc>120 kA/m, a residual induction Mr/Mm≧0.9 and an orientation ratio of about 2.7 achieves, with a self-purging single-shaft blade-type kneading apparatus, very advantageous magnetic values of the magnetic coatings and excellent tape characteristics if at least the following features are fulfilled: a) the radial shear gradient in the gap between blade circumference and housing wall is from about 150 to about 1600, in particular from about 500 to about 1400, l/sec b) the circumferential velocity of the kneading blade is from about 20 to about 80, in particular from about 35 to about 60, cm/sec. The magnetic dispersion prepared can be used in particular for data and video recording media having high recording and storage rates.
摘要翻译：具有Hc> 120kA / m，残余感应Mr / Mm> = 0.9和取向比约为2.7的高质量磁性分散体的制备方法，通过自吹扫单轴叶片式捏合装置，磁性涂层的非常有利的磁性值和优异的胶带特性，如果至少满足以下特征：a）叶片周长和壳体壁之间的间隙中的径向剪切梯度为约150至约1600，特别是约 500至约1400，l / secb）捏合叶片的圆周速度为约20至约80，特别是约35至约60厘米/秒。制备的磁性分散体可用于数据和视频具有高记录和存储速率的记录介质。

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