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1. 发明专利

JP2006139861A Magnetic recording medium and its manufacturing method 有权
标题翻译：磁记录介质及其制造方法
公开(公告)号：JP2006139861A
公开(公告)日：2006-06-01
申请号：JP2004329109
申请日：2004-11-12
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： KAWADA YASUYUKI , ONO TAKUYA , SOMA KENICHIRO
IPC分类号： G11B5/738 , G11B5/65 , G11B5/73
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium having high anisotropy and excellent electromagnetic transducing characteristics, in the magnetic recording medium using a glass substrate.
SOLUTION: In the magnetic recording medium provided with the glass substrate, a seed layer and a magnetic layer, 25 to 60 pieces/μm
2 nearly concentric grooves having 3 to 5 nm depth are texture-worked in the glass substrate and a first seed layer consisting of Cr, a second seed layer consisting of a NiNb alloy, a third seed layer consisting of Cr and a fourth seed layer consisting of a NiNb alloy are sequentially layered to form the seed layer. The NiNb alloy of the second and fourth seed layers preferably contains 30 to 50 at% Nb.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：在使用玻璃基板的磁记录介质中，提供具有高各向异性和优异的电磁转换特性的磁记录介质。解决方案：在设置有玻璃基板的磁记录介质中，种子层和磁性层，具有3至5nm深度的25至60个/μm2 / 加工在玻璃基板中，并且由Cr组成的第一种子层，由NiNb合金构成的第二种子层，由Cr组成的第三籽晶层和由NiNb合金构成的第四籽晶层依次层叠以形成种子层。第二种子层和第四种子层的NiNb合金优选含有30〜50原子％的Nb。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2005116076A Magnetic recording medium having two recording layers and magnetic recording/reproducing device 审中-公开
标题翻译：具有两个记录层和磁记录/再现装置的磁记录介质
公开(公告)号：JP2005116076A
公开(公告)日：2005-04-28
申请号：JP2003349880
申请日：2003-10-08
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： ONO TAKUYA , ENOMOTO KAZUO
IPC分类号： G11B5/66 , G11B5/02 , G11B5/65 , G11B11/10
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium having two recording layers in which magnetic information of two layers including a high frequency signal can be surely separated, and a magnetic recording device. SOLUTION: This magnetic recording medium has the two recording layers consisting of a ferromagnetic recording layer comprised of ferromagnetic object and a ferrimagnetic recording layer comprised of ferrimagnetic object, The ferrimagnetic recording layer (broken line) has temperature characteristic such that it has compensation temperature near room temperature R.T., it has coercive force Hc larger than coercive force Hc of ferromagnetic recording layer (solid line) in the room temperature R.T., magnetization Ms becomes almost zero, also temperature which is the compensation temperature or more and in which the magnitude of magnetization Ms has the maximum is present, Curie temperature Tc2 is lower than Curie temperature of the ferromagnetic recording layer, and a temperature region in which the coercive force Hc becomes smaller than the coercive force Hc of the ferromagnetic recording layer (solid line) is present in high temperature. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种具有两个记录层的磁记录介质，其中可以可靠地分离包括高频信号的两层的磁信息和磁记录装置。解决方案：该磁记录介质具有由铁磁体和由铁磁体构成的铁磁记录层构成的两个记录层。铁磁记录层（虚线）具有使其具有补偿的温度特性在室温RT附近，在室温RT下具有比铁磁记录层（实线）的矫顽力Hc大的矫顽力Hc，磁化Ms变为几乎为零，也是补偿温度以上的温度，其中的幅度的磁化强度Ms具有最大值，居里温度Tc2低于铁磁记录层的居里温度，矫顽力Hc变得小于铁磁记录层（实线）的矫顽力Hc的温度区域是存在于高温下。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2004054977A Magnetic recording medium embedded with content management information and storage magnetic recording device 审中-公开
公开(公告)号：JP2004054977A
公开(公告)日：2004-02-19
申请号：JP2002207697
申请日：2002-07-17
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： ONO TAKUYA , SATO KIMINORI
IPC分类号： G11B5/73 , G06F21/10 , G11B5/012 , G11B5/74 , G11B5/82 , G11B5/855 , G11B20/00 , G11B20/10 , G11B20/12 , G11B27/00 , H04N5/913 , H04N7/173
CPC分类号： B82Y10/00 , G11B5/012 , G11B5/74 , G11B5/743 , G11B5/82 , G11B5/855 , G11B20/00086 , G11B20/00115 , G11B20/00137 , G11B20/00144 , G11B20/00173 , G11B20/0021 , G11B20/0026 , G11B20/00347 , G11B20/00768 , G11B20/0084 , H04N5/913 , H04N7/17318 , H04N21/4334 , H04N21/4408 , H04N21/47202 , H04N21/8352 , H04N21/8355 , H04N2005/91328
摘要： PROBLEM TO BE SOLVED: To prevent the unauthorized use of contents corresponding to the variety of forms of application by embedding content management information for managing forms of application of the contents in the magnetic recording medium. SOLUTION: A pattern 402 corresponding to the copy management information as the content management information is embedded together with a pattern 403 corresponding to a track ID which is a unique code for each track in a track ID embedded area 401 of a magnetic recording medium. The copy management information pattern 402 is set for each track classified by for example, a gray code. COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2006318614A Magnetic recording medium and its manufacturing method 审中-公开
标题翻译：磁记录介质及其制造方法
公开(公告)号：JP2006318614A
公开(公告)日：2006-11-24
申请号：JP2005142977
申请日：2005-05-16
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： ONO TAKUYA
IPC分类号： G11B5/65 , G11B5/73 , G11B5/738 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To propose a glass substrate, a seed layer and a magnetic layer which constitute a magnetic recording medium for obtaining high magnetic anisotropy in the magnetic recording medium having the seed layer of a laminated structure on a non-metal substrate of a glass based material.
SOLUTION: The seed layer 2 is disposed on the disk-like non-metal substrate 1 on the surface of which texture working in the circumferential direction is applied. The seed layer has first and second seed layers 21 and 22 having respective prescribed film thicknesses. A non-magnetic underlayer 3 and the magnetic layer 4 are disposed on the seed layer 2. Change rate of a value obtained by dividing residual magnetization in the circumferential direction of the magnetic layer 4 by residual magnetization in the radial direction to the reciprocals of film thicknesses of the first and the second seed layers 21 and 22 are 6 nm or below.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提出一种玻璃基板，种子层和磁性层，它们构成用于在具有非金属层压结构的种子层的磁记录介质中获得高磁各向异性的磁记录介质玻璃基材料的基材。解决方案：籽晶层2在施加周向方向纹理的表面上设置在盘状非金属基片1上。种子层具有具有各自规定膜厚度的第一种子层21和第二种子层22。将非磁性底层3和磁性层4设置在种子层2上。通过将磁性层4的周向上的剩余磁化沿径向的剩余磁化除以膜的倒数而得到的值的变化率第一种子层21和第二种子层22的厚度为6nm以下。版权所有（C）2007，JPO＆INPIT

5. 发明专利

JP2006294132A Method for evaluating overwrite of magnetic recording medium 审中-公开
标题翻译：用于评估磁记录介质超声的方法
公开(公告)号：JP2006294132A
公开(公告)日：2006-10-26
申请号：JP2005114054
申请日：2005-04-12
申请人： Fuji Electric Holdings Co Ltd , 富士電機ホールディングス株式会社
发明人： ONO TAKUYA
IPC分类号： G11B5/84
摘要： PROBLEM TO BE SOLVED: To precisely estimate a desirable overwrite value OW in a desired recording frequency f1 about a magnetic disk of an evaluation object. SOLUTION: A recording frequency characteristic curve 100 showing a relation between an LF frequency f1 as a recording frequency in a frequency band including the desired recording frequency and the overwrite value OW at the LF frequency f1 is obtained statistically with a method of least square from overwrite value OW (plotting points in the figure) measured for two or more respective different LF frequencies f1 in the frequency band, and the overwrite value in the desired recording frequency is estimated based on the characteristic curve 100. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：精确估计关于评估对象的磁盘的所需记录频率f1中的期望重写值OW。解决方案：使用最少的方法来统计地显示表示在包括所需记录频率的频带中的LF频率f1与LF频率f1之间的重写值OW之间的关系的记录频率特性曲线100 根据特征曲线100来估计针对频带中的两个或更多个不同LF频率f1的覆盖值OW（图中的绘制点），并且期望记录频率中的重写值被估计。（C）2007，JPO＆INPIT

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