专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明授权

US5292597A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5292597A
公开(公告)日：1994-03-08
申请号：US777147
申请日：1991-10-16
申请人： Hitoshi Noguchi , Shinji Saito , Hiroshi Ogawa
发明人： Hitoshi Noguchi , Shinji Saito , Hiroshi Ogawa
IPC分类号： G11B5/706 , C09D5/23 , C09D7/12 , G11B5/716 , B32B5/16 , G11B5/66
CPC分类号： G11B5/716 , Y10S428/90 , Y10T428/257
摘要： A magnetic recording medium having excellent electromagnetic characteristics and well adapted for video use, which comprises a non-magnetic support having provided thereon at least two magnetic layers each comprising a ferromagnetic powder and a binder resin, wherein the uppermost magnetic layer arranged farthest from the support contains a cobalt-containing iron oxide powder having an Fe.sup.2+ /Fe.sup.3+ mole ratio of 20/100 to 50/100 and a coercive force of 650 to 1,500 Oe, and at least one of said magnetic layers is a lower magnetic layer in contact with the uppermost magnetic layer and contains a cobalt-containing iron oxide powder having an Fe.sup.2+ /Fe.sup.3+ mole ratio of less than 20/100 and a coercive force of 0.6 to 1.0 times that of the cobalt-containing iron oxide powder contained in the uppermost magnetic layer.
摘要翻译：一种具有优异的电磁特性并且非常适合于视频使用的磁记录介质，其包括非磁性载体，其上设置有至少两个磁性层，每个磁性层包含铁磁性粉末和粘合剂树脂，其中最上层的磁性层布置在与载体含有Fe 2+ / Fe 3+摩尔比为20/100〜50/100，矫顽力为650〜1500Oe的钴的氧化铁粉末，并且所述磁性层中的至少一个是与并且含有Fe 2+ / Fe 3+摩尔比小于20/100的钴的氧化铁粉末和矫顽力为包含在最上层磁性层中的含钴氧化铁粉末的矫顽力的0.6〜1.0倍。

12. 发明申请

US20060024533A1 Magnetic recording medium 有权
公开(公告)号：US20060024533A1
公开(公告)日：2006-02-02
申请号：US11237973
申请日：2005-09-29
申请人： Shinji Saito , Hitoshi Noguchi , Nobuo Yamazaki
发明人： Shinji Saito , Hitoshi Noguchi , Nobuo Yamazaki
IPC分类号： G11B5/708
CPC分类号： G11B5/70678 , G11B5/70 , G11B5/714
摘要： Provided is a magnetic recording medium exhibiting good electromagnetic characteristics in high-density recording The magnetic recording medium employed for magnetically recording signals with a track width equal to or less than 2.0 μm and reproducing the magnetically recorded signals, wherein said magnetic recording medium comprises a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder or comprises a nonmagnetic layer comprise a nonmagnetic powder and a binder and a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder in this order on a nonmagnetic support. Said magnetic layer has a thickness equal to or less than 0.2 μm, and said hexagonal ferrite ferromagnetic powder has an average plate diameter being 1/30 or less of the magnetically recorded track width as well as ½ or less of the thickness of the magnetic layer.

13. 发明授权

US06855394B2 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06855394B2
公开(公告)日：2005-02-15
申请号：US10178764
申请日：2002-06-25
申请人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
发明人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
IPC分类号： G11B5/70 , G11B5/706 , G11B5/708
CPC分类号： G11B5/706 , G11B5/7085 , Y10T428/24355 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording medium is disclosed, comprising a support having provided thereon a substantially nonmagnetic lower layer by coating a lower layer coating solution comprising a nonmagnetic powder dispersed in a binder and drying, and a layer having a thickness of from 0.01 to 0.15 μm by coating a magnetic layer coating solution comprising a ferromagnetic metal powder or a hexagonal ferrite powder dispersed in a binder, wherein the magnetic layer contains diamond particles having an average particle size of from 1/5 to 2 times the thickness of the magnetic layer in an amount of from 0.1 to 5.0 mass % based on the ferromagnetic metal powder.
摘要翻译：公开了一种磁记录介质，其包括通过涂布包含分散在粘合剂中的非磁性粉末的下层涂布溶液和干燥而在其上设置有基本上非磁性的下层的载体，以及通过涂布具有0.01至0.15μm厚度的层包含分散在粘合剂中的铁磁性金属粉末或六方铁氧体粉末的磁性层涂布液，其中所述磁性层含有平均粒度为磁性层厚度的1/5至2倍的金刚石颗粒，其量为基于强磁性金属粉末为0.1〜5.0质量％。

14. 发明授权

US06780503B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06780503B2
公开(公告)日：2004-08-24
申请号：US10281947
申请日：2002-10-29
申请人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
发明人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
IPC分类号： G11B5702
CPC分类号： G11B5/7021 , G11B5/7023 , G11B5/70678 , G11B5/7085 , G11B5/714 , Y10T428/256 , Y10T428/31609
摘要： A magnetic recording medium comprising: a nonmagnetic support; and at least one magnetic layer comprising a ferromagnetic hexagonal ferrite powder and a binder, wherein the magnetic layer comprises diamond particles having an average particle size of 0.03 to 0.5 &mgr;m in a ratio of 0.1 to 5% by weight to the ferromagnetic hexagonal ferrite powder, the ferrite hexagonal ferrite powder has an average tabular diameter of 5 to 40 nm, and the binder is at least one of: (i) a binder comprising from 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM, wherein M represents a hydrogen atom, an alkali metal or ammonium, and (ii) a binder comprising from 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —N+R1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group.
摘要翻译：一种磁记录介质，包括：非磁性载体; 以及包含铁磁性六角铁氧体粉末和粘合剂的至少一个磁性层，其中所述磁性层包含平均粒度为0.03-0.5μm，相对于铁磁性六角铁氧体粉末为0.1-5wt％的金刚石颗粒，所述铁氧体六角铁氧体粉末的平均片状直径为5〜40nm，所述粘合剂为以下中的至少一种：（i）包含0.2〜0.7meq / g的至少一种选自-SO 3 M， OSO3M，-PO（OM）2，-OPO（OM）2和-COOM，其中M表示氢原子，碱金属或铵，和（ii）包含0.5-5meq / g至少一种选自-CONR1R2，-NR1R2和-N + R1R2R3的极性基团，其中R1，R2和R3各自独立地表示氢原子或烷基。

15. 发明授权

US06677036B2 Method for producing magnetic recording medium and magnetic recording medium 有权
标题翻译：磁记录介质和磁记录介质的制造方法
公开(公告)号：US06677036B2
公开(公告)日：2004-01-13
申请号：US10281996
申请日：2002-10-29
申请人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
发明人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
IPC分类号： B05D512
CPC分类号： G11B5/70678 , G11B5/7021 , G11B5/7023 , Y10S428/90
摘要： A method for producing a magnetic recording medium comprising: dispersing at least a binder and a ferromagnetic hexagonal ferrite powder to prepare a magnetic coating; and applying the magnetic coating to provide at least one magnetic layer, wherein the binder is at least one of: (a) a binder comprising 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM wherein M represents a hydrogen atom, an alkali metal or ammonium; and (b) a binder comprising 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —N+R1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group, and the ferromagnetic hexagonal ferrite powder has an average tabular diameter of from 10 to 40 nm and a water content of from 0.3 to 3% by weight.
摘要翻译：一种制造磁记录介质的方法，包括：分散至少一种粘结剂和一种铁磁性六角铁氧体粉末以制备磁性涂层; 以及施加所述磁性涂层以提供至少一个磁性层，其中所述粘合剂是以下至少一种：（a）包含0.2至0.7meq / g的至少一种选自-SO 3 M，-OSO 3 M，-PO （OM）2，-OPO（OM）2和-COOM，其中M表示氢原子，碱金属或铵; 和（b）包含0.5-5meq / g至少一种选自-CONR1R2，-NR1R2和-N + R1R2R3的极性基团的粘合剂，其中R1，R2和R3各自独立地表示氢原子或烷基，铁磁六方铁氧体粉末的平均片状直径为10〜40nm，水含量为0.3〜3重量％。

16. 发明授权

US5318828A Magnetic recording medium having multiple magnetic layers comprising magnetic particles and polyurethane resins having glass transition temperatures within specified ranges 失效
标题翻译：磁记录介质具有多个包含磁性颗粒的磁性层和具有玻璃化转变温度在特定范围内的聚氨酯树脂
公开(公告)号：US5318828A
公开(公告)日：1994-06-07
申请号：US26164
申请日：1993-03-01
申请人： Hitoshi Noguchi , Shinji Saito , Hiroshi Ogawa
发明人： Hitoshi Noguchi , Shinji Saito , Hiroshi Ogawa
IPC分类号： G11B5/702 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/06 , G11B5/714 , G11B5/716 , G11B5/00
CPC分类号： G11B5/7021 , G11B5/716 , Y10S428/90 , Y10T428/24942 , Y10T428/24975 , Y10T428/256 , Y10T428/265 , Y10T428/3158 , Y10T428/31591 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium is disclosed comprising a non-magnetic support having provided thereon a plurality of magnetic layers containing a ferromagnetic powder dispersed in a binder, wherein the lower magnetic layer closest to the support contains as the binder at least one polyurethane resin having a glass transition temperature (Tg) of from -50.degree. C. to -10.degree. C., and the uppermost magnetic layer contains as the binder at least one polyurethane resin having a glass transition temperature of from more than 40.degree. C. to 100 .degree. C.The magnetic recording medium of the present invention exhibits excellent running durability as well as electromagnetic conversion characteristics.
摘要翻译：公开了一种磁记录介质，其包括非磁性载体，其上设置有多个含有分散在粘合剂中的铁磁粉末的磁性层，其中最靠近载体的下磁性层含有至少一种具有玻璃的聚氨酯树脂作为粘合剂转变温度（Tg）为-50℃至-10℃，最上层的磁性层含有玻璃化转变温度高于40℃至100℃的至少一种聚氨酯树脂作为粘合剂本发明的磁记录介质具有优异的运行耐久性以及电磁转换特性。

17. 发明申请

US20050174674A1 Recording/reproducing method of magnetic disc 审中-公开
标题翻译：磁盘的记录/再现方法
公开(公告)号：US20050174674A1
公开(公告)日：2005-08-11
申请号：US11050767
申请日：2005-02-07
申请人： Shinji Saito , Hitoshi Noguchi
发明人： Shinji Saito , Hitoshi Noguchi
IPC分类号： G11B5/82 , G11B5/012 , G11B5/02 , G11B5/39 , G11B5/706 , G11B5/738 , G11B19/28
CPC分类号： G11B5/39 , G11B5/02 , G11B5/70678 , G11B5/73 , G11B19/28
摘要： A method comprising recording or reproducing a magnetic disc with a recording head or a reproducing head, the magnetic disc having a diameter of from 1.91 to 3.81 cm and comprising, in this order, a flexible support, a substantially nonmagnetic lower layer and a magnetic layer containing hexagonal ferrite magnetic powder and a binder, wherein relative speeds in all recording area of the magnetic disc are within a range of from 1.0 to 8.0 m/s when the recording or reproducing is conducted.
摘要翻译：一种包括用记录头或再现头记录或再现磁盘的方法，该磁盘的直径为1.91至3.81cm，并且依次包括柔性支撑件，基本上非磁性的下层和磁性层包含六角铁氧体磁粉和粘合剂，其中当进行记录或再现时，磁盘的所有记录区域中的相对速度在1.0至8.0m / s的范围内。

18. 发明授权

US06791803B2 Magnetic recording and reproducing method and magnetic recording medium employed for the same 有权
标题翻译：用于其的磁记录和再现方法和磁记录介质
公开(公告)号：US06791803B2
公开(公告)日：2004-09-14
申请号：US10218569
申请日：2002-08-15
申请人： Shinji Saito , Nobuo Yamazaki , Hitoshi Noguchi
发明人： Shinji Saito , Nobuo Yamazaki , Hitoshi Noguchi
IPC分类号： G11B502
CPC分类号： G11B5/714 , G11B5/70 , G11B5/70678 , Y10T428/257
摘要： Provided are a method of magnetic recording and reproducing capable of permitting high density recording on magnetic recording media even under the condition of high data transfer rates and yielding adequate recording and reproduction characteristics when an MR head is used in reproduction, and a magnetic recording medium capable of being used in this magnetic recording and reproducing method. The magnetic recording and reproducing method is a method for reproducing a signal magnetically recorded on a magnetic recording medium with a magnetoresistive (MR) head. The magnetic recording medium comprises a substantially nonmagnetic lower layer and a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder in this order on at least one side of a nonmagnetic support, in which said hexagonal ferrite ferromagnetic powder has a mean plate diameter ranging from 15 to 40 nm and a mean plate thickness ranging from 4 to 15 nm, and said magnetic layer has a coercive force Hc ranging from 143.3 to 318.4 kA/m, and said signal magnetically recorded has a maximum recording frequency ranging from 10 to 80 MHz.
摘要翻译：提供了一种磁记录和再现方法，即使在高数据传输速率的条件下也能够在磁记录介质上进行高密度记录，并且当在再现中使用MR磁头时产生足够的记录和再现特性，以及能够使用磁记录介质被用于这种磁记录和再现方法中。磁记录和再现方法是一种利用磁阻（MR）磁头再现磁记录在磁记录介质上的信号的方法。磁记录介质在非磁性载体的至少一侧上依次包括基本上非磁性的下层和包含六方铁素体铁磁粉末和粘合剂的磁性层，其中所述六方晶系铁氧体铁磁粉末的平均板直径范围为 15至40nm，平均板厚度范围为4至15nm，所述磁性层的矫顽力Hc为143.3至318.4kA / m，磁性记录的所述信号具有10至80MHz的最大记录频率。

19. 发明授权

US06703106B2 Magnetic recording and reproducing method and magnetic recording medium for use in the method 有权
标题翻译：用于该方法的磁记录和再现方法和磁记录介质
公开(公告)号：US06703106B2
公开(公告)日：2004-03-09
申请号：US10126616
申请日：2002-04-22
申请人： Hitoshi Noguchi , Takeshi Harasawa , Shinji Saito
发明人： Hitoshi Noguchi , Takeshi Harasawa , Shinji Saito
IPC分类号： G11B502
CPC分类号： G11B5/7085 , G11B5/00 , G11B5/70605 , G11B5/70678 , G11B2005/0016 , Y10T428/115 , Y10T428/25
摘要： A magnetic recording and reproducing method comprising recording and reproducing a signal with a magnetic head in a track width (A) of less than 5 &mgr;m on a magnetic recording medium comprising a support having provided thereon a magnetic layer containing at least a ferromagnetic powder, an abrasive and a binder, wherein the average longer size (B) of the abrasive particle(s) which are present on the magnetic layer surface is ⅓ or less of the track width (A).
摘要翻译：一种磁记录和再现方法，包括在磁记录介质上记录和再现具有小于5μm的磁道宽度（A）的磁头的信号，所述磁记录介质包括其上设置有至少含有铁磁性粉末的磁性层的支撑体，研磨剂和粘合剂，其中存在于磁性层表面上的磨料颗粒的平均较长尺寸（B）为轨道宽度（A）的1/3或更小。

20. 发明授权

US6037030A Disc-like magnetic recording medium 失效
标题翻译：盘状磁记录介质
公开(公告)号：US6037030A
公开(公告)日：2000-03-14
申请号：US46591
申请日：1998-03-24
申请人： Hitoshi Noguchi , Junichi Nakamigawa , Shinji Saito
发明人： Hitoshi Noguchi , Junichi Nakamigawa , Shinji Saito
IPC分类号： G11B5/706 , G11B5/70 , G11B5/714 , G11B5/738 , G11B5/82
CPC分类号： G11B5/70 , G11B5/714 , Y10T428/256 , Y10T428/265
摘要： A disc-like magnetic recording medium is disclosed, which comprises a support having thereon a magnetic layer comprising a ferromagnetic powder and a binder as main components, wherein the ferromagnetic powder has an average long axis length of from 0.01 to 0.18 .mu.m, a crystallite size of from 50 to 180 .ANG., an acicular ratio of from 2 to 9, the magnetic layer has the coercive force Hc of from 1,700 to 3,000 Oe, the in-plane orientation ratio of 0.85 or more, and the squareness ratio in the vertical direction to the surface of the magnetic layer of 0.30 or less.
摘要翻译：公开了一种盘状磁记录介质，其包括其上具有包含铁磁粉末和粘合剂作为主要成分的磁性层的载体，其中铁磁粉末的平均长轴长度为0.01至0.18μm，微晶尺寸为50〜180安培，针状比为2〜9，磁性层的矫顽力Hc为1700〜3000Oe，面内取向率为0.85以上，垂直方向的垂直度磁性层表面的方向为0.30以下。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式