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1. 发明授权

US5571595A Magnetic recording medium and method for production thereof 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：US5571595A
公开(公告)日：1996-11-05
申请号：US90197
申请日：1993-11-26
申请人： Kazunobu Chiba , Kenichi Sato , Yuichi Arisaka , Hirofumi Kondo , Yukari Yamada
发明人： Kazunobu Chiba , Kenichi Sato , Yuichi Arisaka , Hirofumi Kondo , Yukari Yamada
IPC分类号： G11B5/72 , G11B5/725 , G11B5/735 , G11B5/84 , G11B5/66 , B32B3/10 , C23C14/00
CPC分类号： G11B5/725 , G11B5/72 , G11B5/735 , G11B5/8408 , Y10S428/90 , Y10T428/24355 , Y10T428/265 , Y10T428/30 , Y10T428/31721 , Y10T428/31725 , Y10T428/31786
摘要： A magnetic recording medium having a magnetic metal thin film as a magnetic layer is disclosed. An oxide layer is formed on the surface of the magnetic metal thin film, and a proactive layer is further formed on the oxide layer. The oxide layer on the surface of the magnetic metal thin film has a thickness of 20 to 230 .ANG., while the protective layer has a thickness of 20 to 230 .ANG.. The combined total thickness of the oxide layer and the protective layer is 40 to 250 .ANG.. The oxide layer surface may be bombarded prior to formation of the protective layer for improving the bonding of the protective layer. A lubricant may be coated on the surface of the protective layer. The lubricant may be one of perfluoro alkyl ester of carboxylic acid, ester compounds of perfluoro polyether having carboxylic groups, and amine salt compounds. The reverse surface of a non-magnetic base film as a substrate has a centerline mean roughness R.sub.a and the maximum height R.sub.max of projections in the ranges of 0.015 .mu.m.ltoreq.R.sub.a 0.0070 .mu.m and 0.015.ltoreq.R.sub.max .ltoreq.0.070 .mu.m, respectively.
摘要翻译： PCT No.PCT / JP92 / 01510 Sec。 371日期：1993年11月26日 102（e）日期1993年11月26日PCT 1991年11月18日PCT PCT。公开号WO93 / 10526 日期：1993年5月27日公开了具有磁性金属薄膜作为磁性层的磁记录介质。在磁性金属薄膜的表面上形成氧化物层，在氧化物层上进一步形成主动层。磁性金属薄膜表面的氧化物层的厚度为20〜230，保护层的厚度为20〜230。氧化物层和保护层的总厚度为40至250安培。在形成用于改善保护层的结合的保护层之前，可以轰击氧化物层表面。润滑剂可以涂覆在保护层的表面上。润滑剂可以是羧酸的全氟烷基酯，具有羧基的全氟聚醚的酯化合物和胺盐化合物之一。作为基板的非磁性基膜的反面具有中心线平均粗糙度Ra和突起的最大高度Rmax在0.015μm≤Ra0.0070μm和0.015≤Rmax<0.070的范围内亩。

2. 发明授权

US5247397A Method for magnetically recording digital video signals with specified ranges of the easy axis and the bias magnetic field 失效
标题翻译：磁性记录数字视频信号的方法，具有易于轴和偏置磁场的指定范围
公开(公告)号：US5247397A
公开(公告)日：1993-09-21
申请号：US781578
申请日：1991-10-23
申请人： Kenichi Sato , Kazunobu Chiba , Yuichi Arisaka , Toshiharu Kobayashi , Yukari Yamada
发明人： Kenichi Sato , Kazunobu Chiba , Yuichi Arisaka , Toshiharu Kobayashi , Yukari Yamada
IPC分类号： G11B5/09 , G11B5/86 , H04N5/926
CPC分类号： G11B5/865 , G11B5/09 , H04N5/9261
摘要： A magnetic recording transfer method for use with the combination of a mother magnetic recording medium and a copy magnetic recording medium of a metal-deposited thin film type each. The two media are overlaid so that the column inclination of one medium will be opposite in direction to that of the other medium. This method comprises the step of externally applying a biased magnetic field to the combination of the media in such a manner that magnetized recordings on the mother medium will be transferred to the copy medium. The easy axis of the mother medium is positioned at an angle of 20.degree..+-.15.degree. with respect to the in-plane direction of the medium. The biased magnetic field is applied to the mother medium at an angle of 110.degree..+-.15.degree. with respect to the in-plane direction of the medium. This makes it possible to enhance the efficiency in transferring magnetic recording of the mother medium, especially the recordings of short wave lengths, and to minimize demagnetization of the mother medium. Furthermore, the ratio of the coercive force H.sub.CM of the mother medium to the coercive force H.sub.CC of the copy medium (H.sub. CM /H.sub.CC) is set to at most 1.5. This improves the magnetic recording transfer output of the copy medium and boosts the efficiency in the magnetic transfer of short wave magnetic recordings.
摘要翻译：一种磁记录转印方法，其用于母体磁记录介质和金属沉积薄膜型的复制磁记录介质的组合。两个介质被重叠，使得一个介质的列倾角将与其它介质的方向相反。该方法包括以下步骤：将偏置的磁场施加到介质的组合，使得母介质上的磁化记录将被传送到复制介质。母介质的容易轴相对于介质的面内方向以20°±15°的角度定位。将偏置磁场相对于介质的面内方向以110°±15°的角度施加到母介质。这使得可以提高转印母介质的磁记录的效率，特别是短波长的记录，并且使母介质的退磁最小化。此外，母介质的矫顽力HCM与复印介质的矫顽力HCC的比例（H CM / HCC）设定为1.5以下。这改善了复印介质的磁记录传送输出，提高了短波磁记录磁传输的效率。

3. 发明授权

US5672425A Magnetic recording medium and a method of fabricating the same 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：US5672425A
公开(公告)日：1997-09-30
申请号：US902869
申请日：1992-06-23
申请人： Kenichi Sato , Kazunobu Chiba , Yuichi Arisaka , Yukari Yamada
发明人： Kenichi Sato , Kazunobu Chiba , Yuichi Arisaka , Yukari Yamada
IPC分类号： G11B5/66 , G11B5/72
CPC分类号： G11B5/72 , Y10S428/90 , Y10T428/26 , Y10T428/265 , Y10T428/30
摘要： A magnetic recording medium comprised of a nonmagnetic support; a magnetic metal thin film formed on one major surface of the nonmagnetic support; and a protective film of a corrosion-resistant metal or a multilayer protective film structure consisting of a corrosion-resistant metal film and a durable protective film of a hard material. A multilayer protective film structure is formed by sputtering a corrosion-resistant protective film and a durable protective film over the magnetic metal thin film while the nonmagnetic support travels along the circumference of a cooling cylinder by using at least one target of a corrosion-resistant metal and at least one target of a hard material, or by using a composite target composed of at least one corrosion-resistant metal and one hard material. The protective film suppresses the corrosion of the magnetic metal thin film and improves the corrosion resistance and durability of the magnetic recording medium.
摘要翻译：由非磁性载体组成的磁记录介质; 形成在非磁性载体的一个主表面上的磁性金属薄膜; 以及由耐腐蚀金属膜和坚硬材料的耐久保护膜组成的耐腐蚀金属或多层保护膜结构的保护膜。多层保护膜结构是通过在磁性金属薄膜上溅射耐腐蚀保护膜和耐久保护膜而形成的，而非磁性支撑通过使用至少一个耐腐蚀金属靶材沿着冷却筒的圆周行进和硬质材料的至少一个靶材，或者使用由至少一种耐腐蚀金属和一种硬质材料构成的复合靶材。保护膜抑制磁性金属薄膜的腐蚀，提高磁记录介质的耐腐蚀性和耐久性。

4. 发明授权

US5906880A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5906880A
公开(公告)日：1999-05-25
申请号：US637562
申请日：1996-04-25
申请人： Kazunobu Chiba , Kenichi Sato , Yuichi Arisaka , Yukari Yamada
发明人： Kazunobu Chiba , Kenichi Sato , Yuichi Arisaka , Yukari Yamada
IPC分类号： G11B5/64 , G11B5/66
CPC分类号： G11B5/66 , G11B5/64 , Y10S428/90 , Y10T428/24942 , Y10T428/2495 , Y10T428/24975 , Y10T428/265
摘要： A magnetic recording medium, comprising a nonmagnetic substrate on the surface of which is deposited a magnetic layer. In one embodiment, the magnetic layer is formed of two thin films of magnetic metal and a layer of nonmagnetic material sandwiched therebetween, the layer of nonmagnetic material having a thickness no greater than 20% of the thickness of the magnetic layer, with the magnetic layer having an energy product of at least 100 gauss.multidot.cm.multidot.Oe as the product of its residual magnetic flux density, thickness and coercive force, and a surface roughness no greater than 0.003 .mu.m in center line average height. In another embodiment, the magnetic layer, which may be a single layer of magnetic metal film or may be of the aforementioned multiple layer construction, is vacuum deposited onto the substrate at an incident angle in the range of 30.degree. to 70.degree..
摘要翻译：一种磁记录介质，包括在其表面上沉积磁性层的非磁性基底。在一个实施例中，磁性层由两个磁性金属薄膜和夹在其间的非磁性材料层形成，非磁性材料层的厚度不大于磁性层厚度的20％，磁性层具有至少100高斯xcm×oe的能量乘积作为其剩余磁通密度，厚度和矫顽力的乘积，以及中心线平均高度不大于0.003μm的表面粗糙度。在另一个实施例中，可以是单层磁性金属膜或可以具有上述多层结构的磁性层以30°至70°的入射角真空沉积到基底上。

5. 发明授权

US5835673A Digital signal recording on a magnetic recording medium having a non-magnetic base and magnetic metal film of certain characteristics 失效
标题翻译：在具有某些特性的非磁性基底和磁性金属薄膜的磁记录介质上进行数字信号记录
公开(公告)号：US5835673A
公开(公告)日：1998-11-10
申请号：US877536
申请日：1997-06-17
申请人： Yukari Yamada , Mayumi Abe , Kazunobu Chiba , Yuichi Arisaka , Kenichi Sato
发明人： Yukari Yamada , Mayumi Abe , Kazunobu Chiba , Yuichi Arisaka , Kenichi Sato
IPC分类号： G11B5/008 , G11B5/09 , G11B5/64 , G11B5/65 , G11B5/70 , G11B5/706 , G11B5/73 , G11B5/733 , G11B5/738 , G11B20/00 , G11B20/10 , H01F10/16 , H04N5/7826 , H04N5/926 , H04N9/804 , H04N19/00 , H04N19/115 , H04N19/126 , H04N19/14 , H04N19/196 , H04N19/46 , H04N19/50 , H04N19/59 , H04N19/65 , H04N19/70 , H04N19/80 , H04N19/85 , H04N19/895 , H04N19/91 , H04N19/98 , H04N5/917 , H04N5/781
CPC分类号： G11B5/7305 , G11B20/10527 , G11B5/0086 , G11B5/09 , G11B5/733 , H04N5/78266 , H04N5/9261 , H04N9/804 , H04N9/8047 , G11B20/00007
摘要： A method for magnetically recording digital video signals includes the steps of: converting input digital video signals into data segmented into blocks each composed of a plurality of pixel data; compression-coding the blocks of pixel data block-by-block; converting the compression-coded data into channel-encoded data; and supplying the channel-encoded data to magnetic heads on a rotary drum for recording by such heads on a magnetic recording medium constituted by a nonmagnetic base having thereon a magnetic layer of at least one thin magnetic metal film which has an energy product of at least 75 G.cm.Oe, with the surface roughness of said magnetic recording medium being at most 0.003 .mu.m in center line average height Ra, and with the surface roughness of said magnetic recording medium being at most 0.04 .mu.m in ten point average height Rz.
摘要翻译：一种用于磁记录数字视频信号的方法包括以下步骤：将输入数字视频信号转换成分段成由多个像素数据组成的块; 逐块地对像素数据块进行压缩编码; 将压缩编码数据转换成通道编码数据; 并将通道编码数据提供给旋转磁鼓上的磁头，用于由这样的磁头记录在由非磁性基体构成的磁记录介质上，该非磁性基底上具有至少一个具有至少一个能量乘积的薄金属薄膜的磁性层 75 G.cm.Oe，所述磁记录介质的表面粗糙度在中心线平均高度Ra中为0.003μm以下，并且所述磁记录介质的表面粗糙度在十点平均高度中为至多0.04μm Rz。

6. 发明授权

US5512349A Method and apparatus for magnetic recording digital video signals and magnetic recording medium therefor 失效
标题翻译：用于磁记录数字视频信号的方法和装置及其磁记录介质
公开(公告)号：US5512349A
公开(公告)日：1996-04-30
申请号：US219957
申请日：1994-03-30
申请人： Kazunobu Chiba , Kenichi Sato , Yuichi Arisaka
发明人： Kazunobu Chiba , Kenichi Sato , Yuichi Arisaka
IPC分类号： G11B5/008 , G11B5/09 , G11B5/187 , G11B5/21 , G11B5/73 , G11B5/85 , G11B20/00 , G11B20/14 , G11B20/18 , H04N5/782 , H04N5/7826 , H04N5/926 , H04N7/26 , H04N9/804 , H04N9/806 , B32B33/00 , B32B9/00 , B32B19/00 , G11B5/66
CPC分类号： G11B5/7305 , G11B20/00007 , G11B20/1426 , G11B20/1813 , G11B20/1833 , G11B5/0086 , G11B5/09 , G11B5/187 , G11B5/21 , G11B5/70 , G11B5/85 , H04N19/98 , H04N5/782 , H04N5/9261 , H04N9/8042 , H04N9/806 , H04N5/78263 , H04N9/8047 , H04N9/8063 , Y10T428/24355 , Y10T428/26 , Y10T428/265
摘要： A magnetic tape for the recording of digital video signals is constituted by a nonmagnetic base having thereon a magnetic layer of at least one thin magnetic metal film which has an energy product of at least 100 G.cm.Oe, and with the surface roughness of the magnetic tape being at most 0.003 .mu.m in center line average height. Such tape, when used with magnetic heads each having a gap defined between portions of the respective head having a saturation magnetic flux density of at least 14 kG., contribute to the maintenance of an acceptable raw error bit rate below 1.times.10.sup.-4 when recording with a recorded bit area of no more than 1.25 .mu.m.sup.2 /bit.
摘要翻译：用于记录数字视频信号的磁带由具有至少一个薄磁性金属膜的磁性层的非磁性基底构成，该磁性层具有至少100G·cm·Oe的能量积，并且表面粗糙度磁带的中心线平均高度最大为0.003μm。当与具有在具有至少14kG的饱和磁通密度的相应头部的部分之间限定的间隙的磁头一起使用时，这种磁带有助于维持低于1×10 -4的可接受的原始误差位速率，当与记录位面积不超过1.25亩/位。

7. 发明授权

US5347406A Digital video recording apparatus for recording digital video signals of reduced bit rate on magnetic tape having particular thickness, energy product and surface roughness 失效
标题翻译：用于在具有特定厚度，能量积和表面粗糙度的磁带上记录降低比特率的数字视频信号的数字视频记录装置
公开(公告)号：US5347406A
公开(公告)日：1994-09-13
申请号：US83990
申请日：1993-06-28
申请人： Kazunobu Chiba , Kenichi Sato , Yuichi Arisaka
发明人： Kazunobu Chiba , Kenichi Sato , Yuichi Arisaka
IPC分类号： G11B5/008 , G11B5/09 , G11B5/187 , G11B5/21 , G11B5/73 , G11B5/85 , G11B20/00 , G11B20/14 , G11B20/18 , H04N5/782 , H04N5/7826 , H04N5/926 , H04N7/26 , H04N9/804 , H04N9/806 , H04N5/783
CPC分类号： G11B5/7305 , G11B20/00007 , G11B20/1426 , G11B20/1813 , G11B20/1833 , G11B5/0086 , G11B5/09 , G11B5/187 , G11B5/21 , G11B5/70 , G11B5/85 , H04N19/98 , H04N5/782 , H04N5/9261 , H04N9/8042 , H04N9/806 , H04N5/78263 , H04N9/8047 , H04N9/8063 , Y10T428/24355 , Y10T428/26 , Y10T428/265
摘要： A magnetic tape for the recording of digital video signals is constituted by a nonmagnetic base having thereon a magnetic layer of at least one thin magnetic metal film which has an energy product of at least 100 G.cm.Oe, and with the surface roughness of the magnetic tape being at most 0.003 .mu.m in center line average height. Such tape, when used with magnetic heads each having a gap defined between portions of the respective head having a saturation magnetic flux density of at least 14 kG., contribute to the maintenance of an acceptable raw error bit rate below 1.times.10.sup.-4 when recording with a recorded bit area of no more than 1.25 .mu.m.sup.2 /bit.
摘要翻译：用于记录数字视频信号的磁带由具有至少一个薄磁性金属膜的磁性层的非磁性基底构成，该磁性层具有至少100G·cm·Oe的能量积，并且表面粗糙度磁带的中心线平均高度最大为0.003μm。当与具有在具有至少14kG的饱和磁通密度的相应头部的部分之间限定的间隙的磁头一起使用时，这种磁带有助于维持低于1×10 -4的可接受的原始误差位速率，当与记录位面积不超过1.25亩/位。

8. 发明授权

US5253122A Recording of digital video signals on a magnetic medium having a particular energy product and surface roughness 失效
标题翻译：在具有特定能量积和表面粗糙度的磁介质上记录数字视频信号
公开(公告)号：US5253122A
公开(公告)日：1993-10-12
申请号：US784751
申请日：1991-10-30
申请人： Kazunobu Chiba , Kenichi Sato , Yuichi Arisaka
发明人： Kazunobu Chiba , Kenichi Sato , Yuichi Arisaka
IPC分类号： G11B5/66 , G11B5/008 , G11B5/09 , G11B5/187 , G11B5/21 , G11B5/64 , G11B5/65 , G11B5/73 , G11B5/85 , G11B20/00 , G11B20/14 , G11B20/18 , H04N5/782 , H04N5/7826 , H04N5/926 , H04N5/783
CPC分类号： G11B5/7305 , G11B20/00007 , G11B20/1426 , G11B20/1813 , G11B5/0086 , G11B5/09 , G11B5/187 , G11B5/21 , G11B5/85 , H04N19/98 , H04N5/9261
摘要： A magnetic tape for the recording of digital video signals is constituted by a nonmagnetic base having thereon a magnetic layer of at least one thin magnetic metal film which has an energy product of at least 100 G.cm.Oe, and with the surface roughness of the magnetic tape being at most 0.003 .mu.m in center line average height. Such tape, when used with magnetic heads each having a gap defined between portions of the respective head having a saturation magnetic flux density of at least 14 kG., contribute to the maintenance of an acceptable raw error bit rate below 1.times.10.sup.-4 when recording with a recorded bit area of no more than 1.25 .mu.m.sup.2 /bit.

9. 发明授权

US5349478A Magnetic recording and/or reproducing method having a double azimuth head arrangement 失效
标题翻译：具有双方位头装置的磁记录和/或再现方法
公开(公告)号：US5349478A
公开(公告)日：1994-09-20
申请号：US32015
申请日：1993-03-16
申请人： Kenichi Sato , Kazunobu Chiba
发明人： Kenichi Sato , Kazunobu Chiba
IPC分类号： G11B5/008 , G11B5/02 , G11B5/53
CPC分类号： G11B5/534 , G11B5/02
摘要： A magnetic recording and reproducing method for enhancing picture quality and other characteristics while suppressing the difference in reproduction output between two heads. The method involves using a double azimuth head arrangement for signal recording and reproduction by helical scan. The two heads A and B are provided so that their azimuth angles .theta..sub.A and .theta..sub.B do not coincide with each other. The actual recording direction represented by the sum of the azimuth angles .theta..sub.A and .theta..sub.B on the one hand and a still angle .alpha. between the heads A and B on the other is made as close to the direction of magnetic particle orientation on the magnetic recording medium as possible.
摘要翻译：一种用于在抑制两个头之间的再现输出的差异的同时提高图像质量和其他特性的磁记录和再现方法。该方法涉及使用双方位头装置进行螺旋扫描的信号记录和再现。两个头A和B被设置成使它们的方位角θA和θB彼此不一致。一方面由方位角θA和θB之和表示的实际记录方向和头A和B之间的静止角α在另一方面被制成为接近于磁记录上的磁性颗粒取向方向尽可能中等。

10. 发明授权

US5925404A Manufacturing method of magnetic material for metallic thin film magnetic recording media and metallic thin film magnetic recording medium 失效
标题翻译：用于金属薄膜磁记录介质和金属薄膜磁记录介质的磁性材料的制造方法
公开(公告)号：US5925404A
公开(公告)日：1999-07-20
申请号：US944478
申请日：1997-10-06
申请人： Kazunobu Chiba , Tustomu Takeda , Hiroyuki Yamada , Hideo Katagiri , Hiroshi Osumi
发明人： Kazunobu Chiba , Tustomu Takeda , Hiroyuki Yamada , Hideo Katagiri , Hiroshi Osumi
IPC分类号： C23C14/02 , C23C14/14 , G11B5/64 , G11B5/66 , G11B5/84 , G11B5/85 , H01F41/22
CPC分类号： G11B5/656 , G11B5/84 , G11B5/85 , Y10S428/90
摘要： The quantity of impurities in a magnetic material is decreased to produce a magnetic material with good quality, and a decrease in the cost of the magnetic material is realized by desulfurization. A magnetic raw material for metallic thin film magnetic recording media which contains sulfur more than 20 ppm is desulfurized to obtain the magnetic material for metallic thin film magnetic recording media with the sulfur content adjusted to 20 ppm or below, and a metallic thin film magnetic recording medium having a magnetic layer vaporized thereon with the magnetic material is fabricated.
摘要翻译：磁性材料中的杂质量减少以产生质量好的磁性材料，并且通过脱硫实现磁性材料成本的降低。含有大于20ppm硫的金属薄膜磁记录介质的磁性原料被脱硫以获得硫含量调节至20ppm或更低的金属薄膜磁记录介质的磁性材料和金属薄膜磁记录制造在磁性材料上蒸发了磁性层的介质。

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