公开(公告)号：JP2005063507A

公开(公告)日：2005-03-10

申请号：JP2003289575

申请日：2003-08-08

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SATO SATOSHI

IPC: G11B5/738 ,  G11B5/64 ,  G11B5/65 ,  G11B5/72 ,  G11B5/725 ,  G11B5/73 ,  G11B5/78 ,  G11B5/851

Abstract: PROBLEM TO BE SOLVED: To apply a magnetic layer which has heretofore been applied as the recording layer of a hard disk to a magnetic tape medium.
SOLUTION: The magnetic recording medium has a nonmagnetic base layer 3, consisting of an Ru film deposited by a sputtering method on a nonmagnetic support body 1, consisting of a long-sized polymeric film and has the magnetic layer 4 consisting of of a CoNiPtO-based metallic film deposited by the sputtering method on the nonmagnetic base layer 3.
COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：将已经作为硬盘的记录层应用的磁性层应用于磁带介质。 解决方案：磁记录介质具有非磁性基层3，其由通过溅射法沉积在非磁性载体1上的Ru膜组成，由长尺寸的聚合物膜组成，并且具有由 通过溅射法沉积在非磁性基底层3上的CoNiPtO基金属膜。版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2005004892A

公开(公告)日：2005-01-06

申请号：JP2003167827

申请日：2003-06-12

Applicant: Fts Corporation:Kk ,  Sony Corp ,  ソニー株式会社 ,  株式会社 エフ・ティ・エス コーポレーション

Inventor： SATO SATOSHI ,  KADOKURA SADAO

IPC: C23C14/06 ,  C23C14/34 ,  C23C14/58 ,  G11B5/64 ,  G11B5/73 ,  G11B5/738 ,  G11B5/84 ,  G11B5/851 ,  H01F41/18

Abstract: PROBLEM TO BE SOLVED: To provide a high-density-recording magnetic recording medium that avoids the thermal deformation of a substrate in a film formation process, damage, or the like and, especially, forms a magnetic layer on the substrate made of a plastic film.
SOLUTION: In the magnetic recording medium 10, the magnetic layer 3 made of a maghemite thin film at least containing cobalt is formed on the substrate 1 made of plastic film; and the maghemite thin film containing cobalt is formed by subjecting the maghemite thin film containing cobalt formed by a facing target sputtering method to oxidation treatment.
COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种避免成膜过程中的基板的热变形，损伤等的高密度记录磁记录介质，特别是在所制成的基板上形成磁性层 的塑料薄膜。 解决方案：在磁记录介质10中，在由塑料膜制成的基板1上形成由至少含有钴的磁赤铁矿薄膜制成的磁性层3; 并且含有钴的磁赤铁矿薄膜通过使由面对靶溅射法形成的含有钴的磁赤铁矿薄膜进行氧化处理而形成。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2004362647A

公开(公告)日：2004-12-24

申请号：JP2003158032

申请日：2003-06-03

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SATO SATOSHI ,  SHOJI YUKIE ,  SEKINO TOMOYUKI

IPC: C10M105/26 ,  C10M105/50 ,  C10M105/54 ,  C10M107/38 ,  C10N30/06 ,  C10N40/18 ,  G11B5/64 ,  G11B5/72 ,  G11B5/725

Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic recording medium having high archival properties, excellent running durability and running stability, and enhanced wear resistance of a head.
SOLUTION: A magnetic recording medium 10 has a magnetic layer 2 consisting of a cobalt-containing maghemite thin film having 1 to 10wt.% cobalt content on a long-length substrate 1. Fine protrusions having 5 to 20 nm height are formed on the magnetic layer-formed surface side at a density of 0.5×10
8 to 5.0×10
8 pieces/mm
2 .
COPYRIGHT: (C)2005,JPO&NCIPI

公开(公告)号：JP2004326851A

公开(公告)日：2004-11-18

申请号：JP2003116653

申请日：2003-04-22

Applicant: Sony Corp ,  ソニー株式会社

Inventor： TERAJIMA HIDEKI ,  TAKAHASHI KIMIO ,  SATO SATOSHI

IPC: G11B5/78 ,  G11B5/738 ,  G11B5/84 ,  G11B5/851

Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic recording medium having satisfactory corrosion resistance and excellent cupping characteristics.
SOLUTION: The magnetic recording medium has a shield layer 2 film-deposited on one principal surface of a non-magnetic substrate 1 of a long shape by a facing-target type sputtering method and consisting of a silicon nitride film and a magnetic layer 3 film-deposited by a vacuum thin film deposition technology. When cupping in the width direction of the medium is defined as a and the length of the width of the medium is defined as w, the absolute value of a/w is specified to be ≤0.05.
COPYRIGHT: (C)2005,JPO&NCIPI

公开(公告)号：JP2004227677A

公开(公告)日：2004-08-12

申请号：JP2003014504

申请日：2003-01-23

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SHOJI YUKIE ,  TERAJIMA HIDEKI ,  SATO SATOSHI

IPC: G11B5/65 ,  G11B5/02 ,  G11B5/64 ,  G11B5/73

Abstract: PROBLEM TO BE SOLVED: To obtain a highly reliable magnetic tape medium superior in electromagnetic conversion characteristics, archival nature, in run durability, and shelf life stability.
SOLUTION: A magnetic recording medium 10 is constituted in such a manner that a magnetic layer 2 consisting of a cobalt-containing maghemite thin film is formed on a nonmagnetic support 1. The nonmagnetic support 1 consists of an aramid film, having a thickness of 3 to 10 μm, a 10 points average roughness SRz of a magnetic layer forming surface of 5 to 30 nm and a degree of heat shrinkage of 1% or below in a temperature range of 25 to 300°C. The magnetic layer 2 has a film thickness of 10 to 50 nm, a center face average roughness SRa on the surface of 0.1 to 3.0 nm, and a coercive force Hc of 2000 to 4000 Oe (158-316 kA/m).
COPYRIGHT: (C)2004,JPO&NCIPI

Abstract translation: 要解决的问题：获得电磁转换特性，档案性，运行耐久性和保质期稳定性优异的高度可靠的磁带介质。 解决方案：磁记录介质10以在非磁性载体1上形成由含钴的磁赤铁矿薄膜组成的磁性层2构成。非磁性载体1由芳族聚酰胺薄膜组成，其具有 厚度为3〜10μm，磁性层形成面的10点平均粗糙度SRz为5〜30nm，热收缩率为1％以下，温度范围为25〜300℃。 磁性层2的膜厚为10〜50nm，表面的中心面平均粗糙度SRa为0.1〜3.0nm，矫顽力Hc为2000〜4000Oe（158-316kA / m）。 版权所有（C）2004，JPO＆NCIPI

公开(公告)号：JP2004047009A

公开(公告)日：2004-02-12

申请号：JP2002205336

申请日：2002-07-15

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SATO SATOSHI

IPC: G11B5/65 ,  G11B5/70 ,  G11B5/702 ,  G11B5/706 ,  G11B5/73 ,  G11B5/851

CPC classification number: G11B5/7023 ,  G11B5/70 ,  G11B5/70621 ,  G11B5/70673 ,  G11B5/7305

Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic recording medium in which a desirable reproduction output, noise level, and error rate are obtained and storage stability is also excellent.
SOLUTION: This magnetic recording medium 10 has constitution in which a magnetic layer 3 consisting of a maghemite thin film containing cobalt is formed on a long substrate 1 consisting of aromatic polyimide, film thickness of the substrate 1 is 3∼10μm, average surface roughness of ten points (SRz) of a plane forming the magnetic layer 3 is 5∼30μm, film thickness of the magnetic layer 3 is 10∼50nm, average surface roughness of center plane (SRz) is 0.1∼3.0nm, coercive force in the plane direction is 2,000∼4,000Oe(158,000∼316,000A/m).
COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2003331411A

公开(公告)日：2003-11-21

申请号：JP2002132724

申请日：2002-05-08

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SATO SATOSHI

IPC: G11B5/64 ,  G11B5/85 ,  H01F10/16 ,  H01F41/20

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium of a high recording density enabling use as a perpendicular magnetic recording medium of a recording and reproducing system in which reproduction of recorded signals is performed by a magneto-resistive head and having a high signal-to-noise ratio and excellent preservable property with a high coercive force and to provide a method for manufacturing the same. SOLUTION: A magnetic layer 2 constituting of a thin magnetic metallic film which consists of Co, Pt and O, contains Co and Pt as essential components, and is controlled to a content ratio of x=60 to 90 (atm.%) when defining the composition formula thereof as Co( 100-x) Pt x is formed on one chief surface of a substrate 1 consisting of a nonmagnetic support by using a vacuum vapor deposition system and heating the substrate to 100 to 400°C under an oxygen introducing rate of 0.2 to 0.8 sccm and a carbon protective layer 3 is deposited on the surface of this magnetic layer 2. Further, the surface of the layer 3 is provided with a lubricating layer 4. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供一种高记录密度的磁记录介质，能够用作记录和再现系统的垂直磁记录介质，其中记录信号的再现由磁阻头执行并具有 高的信噪比和优良的保留性能，具有高的矫顽力，并提供其制造方法。 解决方案：构成由Co，Pt和O组成的薄磁性金属膜的磁性层2含有Co和Pt作为必要组分，并且控制为含量比为x = 60〜90（大气压） ）当将其组成式定义为Co（ 100-x）时，通过使用真空蒸气在由非磁性载体构成的基板1的一个主表面上形成Pt x 沉积系统，并在0.2至0.8sccm的氧气引入速率下将衬底加热至100至400℃，并且在该磁性层2的表面上沉积碳保护层3.此外，层3的表面设置有 润滑层4.版权所有（C）2004，JPO

公开(公告)号：JP2003223774A

公开(公告)日：2003-08-08

申请号：JP2002019246

申请日：2002-01-28

Applicant: SONY CORP

Inventor： OKAWA WATARU ,  YAMAGA MINORU ,  MAEJIMA KATSUNORI ,  HIRAI MOTOSUKE ,  SATO SATOSHI

IPC: G11B5/735 ,  G11B5/008 ,  G11B5/39 ,  G11B5/40 ,  G11B5/738 ,  G11B5/78 ,  G11B15/67 ,  G11B23/087 ,  G11B23/107 ,  G11B23/26 ,  G11B33/14

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic tape cartridge and a recording/reproducing apparatus for the magnetic tape cartridge, capable of preventing the damage of a magnetic head by preventing the electrification of a magnetic tape, while maintaining the high electromagnetic transducing properties and reducing the resistance of the magnetic tape. SOLUTION: A tape reel 7 is made of a conductive material, in which the surface resistivity in 'Ω/square#' of an edge of the magnetic tape 6 connected to a reel hub 7B thereof is made equal to or less than the order of 10 7 . The magnetic tape is composed of a multi-layer structure having a magnetic layer 23, a nonmagnetic conductive layer 22, a plastic film 21, and a back coat layer 24, from the side of a magnetic surface 6M. Thus, the nonmagnetic conductive layer 22 exposed by removing the magnetic layer 23 is connected to a reel hub 7A, even when the surface resistivity of the magnetic layer 23 exceeds 10 7 Ω/square. Accordingly, the resistance of the magnetic tape can be reduced while maintaining the high electromagnetic transducing properties. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2000011351A

公开(公告)日：2000-01-14

申请号：JP18125398

申请日：1998-06-26

Applicant: SONY CORP

Inventor： SATO SATOSHI

IPC: G11B5/66 ,  G11B5/64 ,  G11B5/73 ,  G11B5/733 ,  G11B5/85

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium having both of good electromagnetic conversion characteristics and travelling property which enables further long-time recording and large capacity by using an aromatic polyamide film having

公开(公告)号：JPH1116145A

公开(公告)日：1999-01-22

申请号：JP16472197

申请日：1997-06-20

Applicant: SONY CORP

Inventor： SATO SATOSHI ,  MATSUMURA SHINICHI

IPC: G11B5/66 ,  G11B5/64 ,  G11B5/73 ,  G11B5/733

Abstract: PROBLEM TO BE SOLVED: To provide the magnetic recording medium in which good running and operating characteristics are secured during the production process of a non-magnetic supporting body and the medium, deterioration of the magnetic layer surface caused by back penetration and a transfer is prevented and a good electromagnetic converting characteristic is provided. SOLUTION: In the medium, a magnetic layer 2, made of a metallic magnetic thin film, is formed on a non-magnetic supporting body 1. In the body 1, a spacial average wavelength (Sλa) of a surface 3, on which the layer 2 is formed, is set to 6 to 10 μm, a center line average roughness (SRa) of the surface 4, that is the opposite side of the surface on which the layer 2 is formed, is set to 2 to 12 nm. Moreover, a ten point average roughness (SRz) of the surface 4, that is the opposite side of the surface on which the layer 2 is formed, is set to 20 to 300 nm.