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1. 发明公开

EP1513138A2 Magnetic disk apparatus, method for determining data track pitch, and self-servo write method 审中-公开
标题翻译： Magnetplattenlaufwerk，Verfahren zur Eigen-Servo Schreibverfahren
公开(公告)号：EP1513138A2
公开(公告)日：2005-03-09
申请号：EP04021056.9
申请日：2004-09-03
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Miyata, Keizo , Kohso, Hiroshi , Kimura, Makoto , Ishida, Tatsuaki
IPC分类号： G11B5/596
CPC分类号： G11B5/59633 , G11B5/865
摘要： A self-servo reference signal including a timing pattern and an oblique phase pattern is transferred in advance on a magnetic disk 1 by magnetic printing. A phase difference detection section 13 detects a phase difference between the two patterns to detect the position of a magnetic head 2 . A burst signal generated by a record signal generation section 14 is recorded in a region of the magnetic disk 1 where no self-servo reference signal is recorded. A track pitch calculation section 11 determines a relationship between the reproduction output of the burst signal detected by a reproduction signal processing section 12 and the phase difference detected by the phase difference detection section 13 , thus calculating an optimum data track pitch.
摘要翻译：包括定时图案和倾斜相位图案的自伺服参考信号通过磁性印刷预先传送到磁盘1上。相位差检测部13检测两个图案之间的相位差，以检测磁头2的位置。由记录信号生成部分14产生的脉冲信号被记录在没有记录自伺服参考信号的磁盘1的区域中。轨道间距计算部分11确定由再现信号处理部分12检测到的脉冲串信号的再现输出与由相位差检测部分13检测的相位差之间的关系，从而计算最佳数据磁道间距。

2. 发明授权

EP0675485B1 Magnetic recording and reproduction apparatus 失效
标题翻译：磁性记录和重放装置
公开(公告)号：EP0675485B1
公开(公告)日：2002-01-09
申请号：EP95104792.7
申请日：1995-03-31
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Ishida, Tatsuaki , Sugita, Ryuji , Echigo, Noriyasu , Hasegawa, Hiroyuki
IPC分类号： G11B5/127
CPC分类号： G11B5/1878 , G11B5/00 , G11B5/008 , G11B5/00813 , G11B5/0086 , G11B5/012 , G11B5/02 , G11B5/1274 , G11B5/1278 , G11B5/21 , G11B5/82 , G11B2005/0029

3. 发明公开

EP0617414A1 Method and apparatus for producing magnetic recording medium 失效
标题翻译：生产磁记录介质的方法和设备
公开(公告)号：EP0617414A1
公开(公告)日：1994-09-28
申请号：EP94104380.4
申请日：1994-03-19
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Tohma, Kiyokazu , Sugita, Riyuji , Ishida, Tatsuaki , Ban, Yasuaki
IPC分类号： G11B5/85
CPC分类号： G11B5/85
摘要： A magnetic recording medium having good high density recording characteristics is produced by forming a magnetic layer on a substrate which is traveling around a peripheral surface of a cylindrical can by an oblique vapor deposition method to form a magnetic layer comprising cobalt an axis of easy magnetization of which inclines from a normal line of the layer plane, in which a residual gas pressure in an initial region of the formation of the magnetic layer is kept as low as possible, in particular, the residual gas pressure in the initial region of the formation of the magnetic layer is lower than other part of a production apparatus.
摘要翻译：具有良好高密度记录特性的磁记录介质是通过以下方法制造的：通过倾斜气相沉积方法在围绕圆柱形罐的外周表面行进的基板上形成磁性层，以形成包含钴的磁性层，易磁化轴其从层平面的法线倾斜，其中在磁层形成的初始区域中的残余气体压力保持尽可能低，特别是在形成的初始区域中的残余气体压力磁性层比生产设备的其他部分低。

4. 发明公开

EP0587133A1 Magnetic recording medium and method for producing the same 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：EP0587133A1
公开(公告)日：1994-03-16
申请号：EP93114388.7
申请日：1993-09-08
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Ishida, Tatsuaki , Sugita, Ryuji , Tohma, Kiyokazu , Ban, Yasuaki
IPC分类号： G11B5/64 , G11B5/85 , G11B5/66
CPC分类号： G11B5/656 , G11B5/66 , G11B5/85 , Y10S428/90 , Y10T428/265
摘要： A magnetic tape having a polymer substrate and a magnetic layer which is formed directly on a surface of the substrate or on a primer layer formed on the substrate and contains cobalt, oxygen and optionally nickel, in which a coercive force is at least 120 kA/m and a squareness ratio is at least 0.9 in a hysteresis loop which is obtained when a magnetic field is applied in a plane of the magnetic layer in a longitudinal direction of the magnetic tape, and on the hysteresis loop, an intensity of the applied magnetic field, at which a magnetization when the applied magnetic field is increased is 99 % of the magnetization when the applied magnetic field is decreased, is not larger than 400 kA/m, and preferably, a ratio of a value of magnetization at an intersection between a tangential line drawn at a point which gives a residual magnetization at the applied magnetic field of 0 (zero) and a tangential line drawn at a point which gives a coercive force with a magnetization of 0 in a second quadrant to said residual magnetization is at least 0.9, which magnetic tape has improved high density recording/reproducing properties.
摘要翻译： 1.一种磁带，其具有聚合物基底和直接形成在基底表面上或形成在基底上的底层上的磁性层，该磁性层包含钴，氧和任选的镍，其中矫顽力至少为120kA / m，矩形比在磁性层沿磁带纵向的平面上施加的磁滞回线中获得的磁滞回线中至少为0.9，并且在磁滞回线上，所施加的磁性的强度当施加的磁场增加时的磁化强度是当施加的磁场减小时的磁化强度的99％，不大于400kA / m，并且优选地，施加的磁场之间的交叉处的磁化值在0（零）的施加磁场下给出剩余磁化的点处绘制的切线和在第二秒给出具有0的磁化强度的矫顽力的点处画出的切线所述剩余磁化强度的象限至少为0.9，该磁带具有改进的高密度记录/再现特性。

5. 发明公开

EP0529673A1 Method for manufacturing thin film 失效
标题翻译： Verfahren zur Herstellung einesdünnenFilmes。
公开(公告)号：EP0529673A1
公开(公告)日：1993-03-03
申请号：EP92114842.5
申请日：1992-08-31
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Kawawake, Yasuhiro , Sugita, Ryuji , Tohma, Kiyokazu , Goto, Yoshiki , Ishida, Tatsuaki
IPC分类号： G11B5/85
CPC分类号： G11B5/85 , G11B5/733
摘要： In order to form low and uniform projections on a surface of a thin film, when forming the thin film of metal or alloy on a substrate by means of vacuum deposition, a substrate is employed in which projections having a height not less than 10 nm are formed on the surface thereof at a density of not more than 1 x 10⁶ projections/mm², the initial incident angle of atoms upon the substrate, which serve to mainly constitute the thin film, being set at not less than 50° with respect to the normal line of the substrate, and the temperature of the substrate set at not less than 100°C.
摘要翻译：为了在薄膜的表面上形成低均匀的突起，当通过真空沉积在基板上形成金属或合金薄膜时，使用基板，其中高度不小于10nm的突起为在其表面上以不大于1×10 6个突起/ mm 2的密度形成，用于主要构成薄膜的基底上原子的初始入射角设定为不小于相对于基板的法线为50°，基板的温度为100℃以上。

6. 发明授权

EP0642120B1 Magnetic recording medium 失效
公开(公告)号：EP0642120B1
公开(公告)日：1998-07-08
申请号：EP94112027.1
申请日：1994-08-02
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Sugita, Ryuji , Tohma, Kiyokazu , Ishida, Tatsuaki
IPC分类号： G11B5/64
CPC分类号： G11B5/7325 , G11B5/64

7. 发明公开

EP0675485A1 Magnetic recording and reproduction apparatus 失效
标题翻译： Magnetaufzeichnungs- und-wiedergabegerät。
公开(公告)号：EP0675485A1
公开(公告)日：1995-10-04
申请号：EP95104792.7
申请日：1995-03-31
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Ishida, Tatsuaki , Sugita, Ryuji , Echigo, Noriyasu , Hasegawa, Hiroyuki
IPC分类号： G11B5/127
CPC分类号： G11B5/1878 , G11B5/00 , G11B5/008 , G11B5/00813 , G11B5/0086 , G11B5/012 , G11B5/02 , G11B5/1274 , G11B5/1278 , G11B5/21 , G11B5/82 , G11B2005/0029
摘要： In a magnetic recording and reproduction apparatus wherein signals are recorded with a ring-type magnetic head (10) to a magnetic recording medium (3) having axis of easy magnetization oblique with respect to a film normal of a magnetic layer (1) of the medium. A recording magnetic field generated by the magnetic head is asymmetric with respect to a center line of a gap (7) of the magnetic circuit, and the recording magnetic field in the magnetic layer around a leading edge (6) of the magnetic head is inclined at the same side as the axis of easy magnetization in the magnetic field in a normal plane of the magnetic layer including a direction of relative movement of the magnetic head to the magnetic recording medium when signals are recorded to the medium. Thus, signals can be recorded at a high density. Various types of magnetic head for generating asymmetric magnetic field are provided.
摘要翻译：在磁记录和再现装置中，其中信号用环型磁头（10）记录到磁记录介质（3），磁记录介质（3）具有相对于磁性层（1）的膜法线倾斜的易磁化轴中。由磁头产生的记录磁场相对于磁路的间隙（7）的中心线是不对称的，磁头的前缘（6）周围的磁性层中的记录磁场倾斜与磁性层的正常平面中的磁场中容易磁化的轴的相同侧，包括当信号被记录到介质时磁头与磁记录介质的相对运动的方向。因此，可以以高密度记录信号。提供了用于产生不对称磁场的各种类型的磁头。

8. 发明授权

EP0415335B1 Magnetic recording medium 失效
公开(公告)号：EP0415335B1
公开(公告)日：1994-11-02
申请号：EP90116439.2
申请日：1990-08-28
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Sugita, Ryuji , Tohma, Kiyokazu , Honda, Kazuyoshi , Kawawake, Yasuhiro , Ishida, Tatsuaki
IPC分类号： G11B5/66 , G11B5/64 , G11B5/84
CPC分类号： G11B5/85 , G11B5/66

9. 发明公开

EP0583722A1 Magnetic recording medium and method for producing the same 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：EP0583722A1
公开(公告)日：1994-02-23
申请号：EP93112837.5
申请日：1993-08-11
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Sugita, Ryuji , Tohma, Kiyokazu , Ban, Yasuaki , Ishida, Tatsuaki
IPC分类号： G11B5/64 , G11B5/85
CPC分类号： G11B5/65 , G11B5/656 , G11B5/85 , Y10S428/90
摘要： A magnetic recording medium having a nonmagnetic substrate and a magnetic layer which is formed on a surface of the substrate and has an axis of easy magnetization slanting from a normal line of a layer plane, in which an angular dependency of coercive force, which is measured by changing an applying angle of a magnetic field from -90° to +90° from the layer plane in a normal plane including the axis of easy magnetization, has two maximum values and two minimum values, a ratio of the maximum value closer to a layer plane direction to the minimum value closer to the layer plane direction is from 1.6 to 2.4, and the maximum value closer to the layer plane direction is larger than the maximum value closer to the normal line of the layer plane, which medium has a high S/N ratio.
摘要翻译：一种磁记录介质，其具有非磁性基板和在基板的表面上形成的磁性层，该磁性层具有从层平面的法线倾斜的易磁化轴，其中矫正力的角度依赖性被测量通过在包含易磁化轴的法线平面中将层平面从-90°到+ 90°的磁场的施加角度改变为具有两个最大值和两个最小值，最大值接近于层间平面方向上的最小值为接近层平面方向的最小值为1.6至2.4，并且接近层平面方向的最大值大于接近层平面的法线的最大值，该介质具有高信噪比。

10. 发明公开

EP0464827A3 Magnetic recording medium and method for making the same 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：EP0464827A3
公开(公告)日：1992-03-18
申请号：EP91111149.0
申请日：1991-07-04
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Goto, Yoshiki , Shimasaki, Yukihiro , Honda, Kazuyoshi , Ishida, Tatsuaki , Tohma, Kiyokazu , Sugita, Ryuji , Kawawake, Yasuhiro
IPC分类号： G11B5/704
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/257
摘要： In the magnetic recording medium, the back coat layer (3) which includes polyurethane having a Tg ( the glass-transition temperature) under the room temperature, isocyanate hardener, carbon powder and inorganic abrasive pigment is formed on opposite face of the non-magnetic substrate(1)to the one face covered by the magnetic recording film(2).Owing to the back coat layer, improved characteristic of contact with post and the like is obtained, smooth running condition under small tention was realized, and the magnetic recording medium making small head wear, and having improved wear resistance is obtained.

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