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1. 发明申请

US20060008680A1 Magnetic recording medium 审中-公开
标题翻译：磁记录介质
公开(公告)号：US20060008680A1
公开(公告)日：2006-01-12
申请号：US11178321
申请日：2005-07-12
申请人： Shiho Kamisawa , Hiroaki Doushita
发明人： Shiho Kamisawa , Hiroaki Doushita
IPC分类号： G11B5/716
CPC分类号： G11B5/706 , G11B5/7013 , G11B5/714
摘要： A magnetic recording medium comprising: a non-magnetic support; and a coating layer including a magnetic layer which contains a ferromagnetic powder containing a rare earth element and a binder and optionally a non-magnetic layer which contains a non-magnetic inorganic powder and a binder, wherein an amount of a liberated rare earth element in the coating layer is not more than 30 ppm.
摘要翻译：一种磁记录介质，包括：非磁性载体; 以及包含含有含有稀土元素和粘合剂的铁磁性粉末和任选的含有非磁性无机粉末和粘合剂的非磁性层的磁性层的涂层，其中所释放的稀土元素的量在涂层不超过30ppm。

2. 发明授权

US07041398B2 Magnetic recording medium and magnetic recording and reproducing method using the same 有权
标题翻译：磁记录介质及使用其的磁记录和再现方法
公开(公告)号：US07041398B2
公开(公告)日：2006-05-09
申请号：US11088916
申请日：2005-03-25
申请人： Hiroaki Doushita
发明人： Hiroaki Doushita
IPC分类号： G11B5/706
CPC分类号： C08J7/045 , G11B5/70 , G11B5/70605 , G11B5/712 , G11B5/714
摘要： A magnetic recording medium comprising a non-magnetic support and a magnetic layer containing a ferromagnetic metal powder and a binder, wherein the ferromagnetic metal powder comprises an oxide layer and a metal portion surrounded by the oxide layer, and the ferromagnetic metal powder has an average long axis length of from 30 nm to 55 nm, a coefficient of variation of long axis length of not more than 25%, a coefficient of variation of axial ratio of not more than 20%, and a coefficient of variation of a thickness of the oxide layer of not more than 15%.
摘要翻译：一种包含非磁性载体和含有铁磁性金属粉末和粘合剂的磁性层的磁记录介质，其中所述强磁性金属粉末包括氧化物层和被所述氧化物层包围的金属部分，并且所述强磁性金属粉末具有平均值长轴长度为30nm〜55nm，长轴长度变化系数不大于25％，轴比变化系数不超过20％，厚度变化系数为氧化层不超过15％。

3. 发明授权

US06713171B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06713171B2
公开(公告)日：2004-03-30
申请号：US10216831
申请日：2002-08-13
申请人： Takako Ozawa , Hiroaki Doushita , Takeshi Harasawa
发明人： Takako Ozawa , Hiroaki Doushita , Takeshi Harasawa
IPC分类号： G11B5706
CPC分类号： G11B5/7085 , G11B5/70678 , Y10T428/257
摘要： Provided is a magnetic recording medium having improved electromagnetic characteristics, particularly, in which the C/N ratio in the high-density recording region is markedly improved. The magnetic recording medium comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic hexagonal ferrite powder and a binder in this order on a support. The number of magnetic aggregates present in the magnetic layer that are equal to or higher than 0.5 &mgr;m in size and have a magnetic intensity equal to or greater than 20 times the average value of magnetization turbulence obtained from a magnetic force image measured by a magnetic force microscope is equal to or less than 100/2,000 &mgr;m2.
摘要翻译：提供了具有改善的电磁特性的磁记录介质，特别是其中高密度记录区中的C / N比显着提高。磁记录介质包括非磁性粉末和粘合剂的非磁性层和在载体上依次包含铁磁性六角铁氧体粉末和粘合剂的磁性层。存在于磁性层中的磁性聚集体的数量等于或大于0.5μm，并且具有等于或大于由磁力测量的磁力图像获得的磁化湍流的平均值的20倍的磁强度显微镜等于或小于100 / 2,000mum <2>。

4. 发明申请

US20060067000A1 Magnetic tape cartridge 审中-公开
标题翻译：磁带盒
公开(公告)号：US20060067000A1
公开(公告)日：2006-03-30
申请号：US11236727
申请日：2005-09-28
申请人： Hiroaki Doushita
发明人： Hiroaki Doushita
IPC分类号： G11B5/78 , G11B23/02
CPC分类号： G11B23/037 , G11B5/70 , G11B23/107
摘要： A magnetic tape cartridge wherein a reel with magnetic tape wound thereon is rotatably housed within a cartridge case, the thickness of the magnetic tape being 7 μm or less and a reel hub constituting the reel being formed from a highly rigid material having a flexural rigidity of 5000 MPa or more.
摘要翻译：一种磁带盒，其中具有缠绕在其上的磁带的卷轴可旋转地容纳在盒壳体内，磁带的厚度为7μm或更小，并且构成卷轴的卷轴毂由高刚性材料形成，该刚性材料具有弯曲刚度 5000MPa以上。

5. 发明授权

US06805942B2 Magnetic recording tape 有权
标题翻译：磁记录磁带
公开(公告)号：US06805942B2
公开(公告)日：2004-10-19
申请号：US10447944
申请日：2003-05-30
申请人： Hiroaki Doushita , Noriko Inoue
发明人： Hiroaki Doushita , Noriko Inoue
IPC分类号： G11B5735
CPC分类号： G11B5/7021 , G11B5/735 , Y10T428/25 , Y10T428/257 , Y10T428/31609
摘要： A magnetic recording tape comprising: a magnetic layer comprising a ferromagnetic powder and a binder; a nonmagnetic layer; a support; and a back coating layer, in this order, wherein the magnetic layer comprises, as the binder, a polyurethane resin comprising a dimer diol as a diol component, the back coating layer comprises nonmagnetic inorganic powders and from 1 to 5 parts by weight, based on 100 parts by weight of a total amount of the nonmagnetic inorganic powders, of a lubricant, and a number of protrusions having a height, as measured by an atomic force microscope, of from 30 to 100 nm present on a surface of the back coating layer is from 10 to 1,000 per a 90-&mgr;m square.
摘要翻译：一种磁记录带，包括：包含铁磁粉末和粘合剂的磁性层; 非磁性层; 一个支持和背涂层，其中磁性层包含作为粘合剂的包含二聚体二醇作为二醇组分的聚氨酯树脂，背涂层包含非磁性无机粉末和基于1至5重量份的基于在100重量份的非磁性无机粉末，润滑剂的总量和通过原子力显微镜测量的具有30至100nm的高度的突起的数量存在于背涂层的表面上每90平方米的层数为10至1,000。

6. 发明授权

US06579592B1 Magnetic recording tape with controlled Hc and magnetic flux/unit area value and controlled Cl/Fe intensity 失效
标题翻译：具有受控Hc和磁通量/单位面积值和受控Cl / Fe强度的磁记录带
公开(公告)号：US06579592B1
公开(公告)日：2003-06-17
申请号：US09324754
申请日：1999-06-03
申请人： Satoshi Matsubaguchi , Masaki Suzuki , Hiroaki Doushita , Hiroaki Takano , Hiroo Inaba , Kiyomi Ejiri
发明人： Satoshi Matsubaguchi , Masaki Suzuki , Hiroaki Doushita , Hiroaki Takano , Hiroo Inaba , Kiyomi Ejiri
IPC分类号： G11B5702
CPC分类号： G11B5/70621 , G11B5/70 , Y10T428/24355 , Y10T428/25 , Y10T428/26 , Y10T428/2982 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording tape is described, which comprises a plastic support having provided thereon a magnetic layer comprising a ferromagnetic metal powder dispersed in a binder, wherein the magnetic layer has the product P of the coercivity Hc (Oe) in the in-plane machine direction of the tape and the magnetic flux &phgr;m (G·cm) of from 100 to 160.
摘要翻译：描述了一种磁记录带，其包括在其上设置有包含分散在粘合剂中的强磁性金属粉末的磁性层的塑料支撑体，其中磁性层具有在平面机器方向上的矫顽力Hc（Oe）的乘积P 的磁带和磁通量（G.cm）为100至160。

7. 发明授权

US5503943A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5503943A
公开(公告)日：1996-04-02
申请号：US285781
申请日：1994-08-04
申请人： Kunihiko Sano , Tadashi Yasunaga , Hiroaki Doushita
发明人： Kunihiko Sano , Tadashi Yasunaga , Hiroaki Doushita
IPC分类号： G11B5/64 , C23C14/14 , G11B5/62 , G11B5/65 , G11B5/66 , G11B5/73 , G11B5/85 , H01F10/16
CPC分类号： G11B5/656 , G11B5/85 , Y10S428/90
摘要： A metal thin film magnetic recording medium having improved S/N and reduced noise is disclosed, which has a ferromagnetic metal thin film composed mainly of Co on a non-magnetic support, characterized in that the crystallite size as determined from the thin film X-ray diffraction method is 45 .ANG. (angstrom) or less relative to the (100) face of .alpha.-Co, and 120 .ANG. or less relative to the (002) face of .alpha.-Co.
摘要翻译：公开了一种具有改善的S / N和降低的噪声的金属薄膜磁记录介质，其具有在非磁性载体上主要由Co组成的强磁性金属薄膜，其特征在于，从薄膜X- X射线衍射法相对于α-Co的（100）面为45（埃）或更小，相对于α-Co的（002）面为120或更小。

8. 发明授权

US5093191A Magnetic recording medium containing ferromagnetic particles with specified crystallite sizes and wherein the ratio of chlorine to iron at the surface is within a specified range 失效
标题翻译：含有指定结晶尺寸的氟化物颗粒的磁性记录介质，并且在表面上的氯化物比例在指定范围内
公开(公告)号：US5093191A
公开(公告)日：1992-03-03
申请号：US486329
申请日：1990-02-28
申请人： Kunihiko Sano , Hiroaki Doushita , Kiyomi Ejiri , Hiroyuki Tahara
发明人： Kunihiko Sano , Hiroaki Doushita , Kiyomi Ejiri , Hiroyuki Tahara
IPC分类号： C08K3/02 , C08L27/06 , C08L75/00 , C08L75/04 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/706 , G11B5/714
CPC分类号： G11B5/714 , G11B5/7022 , G11B5/7023 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/2982 , Y10T428/31 , Y10T428/3158 , Y10T428/31605 , Y10T428/31609
摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having thereon a magnetic layer comprising ferromagnetic particles and a binder containing a vinyl chloride polymer, wherein the crystallite size of the ferromagnetic particles is 250 angstrom or less, the vinyl chloride polymer is present in an amount of 20 to 50% by weight based on the binder, and an integrated intensity ratio, which is denoted by .alpha., of Cl-2P spectrum to Fe-2P (3/2) spectrum in the surface of the magnetic layer as measured by X-ray photoelectron spectroscopy is 0.20/1
摘要翻译：公开了一种磁记录介质，包括其上具有包含铁磁颗粒的磁性层和含有氯乙烯聚合物的粘合剂的非磁性载体，其中铁磁颗粒的微晶尺寸为250埃或更小，氯乙烯聚合物存在相对于粘合剂为20〜50重量％，由磁性层表面的Cl-2P光谱与Fe-2P（3/2）光谱的α表示的积分强度比，通过X射线光电子能谱测量为0.20 / 1 <α<0.42 / 1。磁记录材料具有优异的运行性能和耐久性，并且几乎不会导致头部堵塞。

9. 发明申请

US20090087689A1 MAGNETIC RECORDING MEDIUM 审中-公开
标题翻译：磁记录介质
公开(公告)号：US20090087689A1
公开(公告)日：2009-04-02
申请号：US12240284
申请日：2008-09-29
申请人： Hiroaki Doushita , Masahito Oyanagi
发明人： Hiroaki Doushita , Masahito Oyanagi
IPC分类号： G11B5/706
CPC分类号： G11B5/70 , G11B5/7021 , G11B5/71
摘要： The magnetic recording medium comprises a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support. In the magnetic recording medium, a number of protrusions equal to or greater than 10 nm in height on the magnetic layer surface, as measured by an atomic force microscope, ranges from 50 to 500/1,600 μm2, the binder comprises a polyurethane resin with a weight average molecular weight ranging from 100,000 to 200,000, and the magnetic layer further comprises a carbonic ester having a molecular weight ranging from 360 to 460.
摘要翻译：磁记录介质包括在非磁性载体上包含铁磁粉末和粘合剂的磁性层。在磁记录介质中，通过原子力显微镜测量的磁性层表面上的高度等于或大于10nm的突起的数量为50-500 /1,600μm2，粘合剂包括具有重均分子量为100,000〜200,000，磁性层还含有分子量为360〜460的碳酸酯。

10. 发明授权

US07129019B2 Optical information recording medium 失效
标题翻译：光信息记录介质
公开(公告)号：US07129019B2
公开(公告)日：2006-10-31
申请号：US10176088
申请日：2002-06-21
申请人： Takeshi Kakuta , Shinji Saito , Toshio Ishida , Takako Ozawa , Hiroaki Doushita
发明人： Takeshi Kakuta , Shinji Saito , Toshio Ishida , Takako Ozawa , Hiroaki Doushita
IPC分类号： G11B7/24
CPC分类号： G11B7/26 , G11B7/24 , G11B7/24079 , G11B7/246 , G11B7/2467 , G11B7/2472 , G11B7/2478 , G11B7/248 , G11B7/2532 , G11B7/2533 , G11B7/2534 , G11B7/2535 , G11B7/259 , Y10S430/146
摘要： The present invention provides an optical information recording medium that includes a substrate including a groove with a track pitch of 200 to 400 nm and a groove depth of 20 to 150 nm and having successively disposed thereon a light reflecting layer, a recording layer containing a dye in which information is recorded by irradiation with a laser beam having a wavelength of no greater than 450 nm, an adhesive layer, and a cover layer with a thickness of 0.01 to 0.5 mm. A surface of the optical information recording medium on a side disposed with the cover layer has a center surface average roughness (SRa1) of no greater than 3.0 nm when measured over a large surface area and a center surface average roughness (SRa2) of no greater than 3.0 nm when measured over a minute surface area.
摘要翻译：本发明提供一种光信息记录介质，其包括：基板，其具有轨道间距为200〜400nm，槽深为20〜150nm的槽，并且依次配置有光反射层，含有染料的记录层其中通过用波长不大于450nm的激光束照射信息，粘合剂层和厚度为0.01至0.5mm的覆盖层来记录信息。在覆盖层的一侧的光信息记录介质的表面在大面积测定时的中心面平均粗糙度（SRa 1）为3.0nm以下，中心面平均粗糙度（SRa 2）为在一分钟的表面积下测量时不大于3.0nm。

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