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1.发明专利
公开(公告)号：JP2003178414A
公开(公告)日：2003-06-27
申请号：JP2001375422
申请日：2001-12-10
Applicant: SONY CORP
Inventor： MAEDA NAOTO , OKAWA WATARU
Abstract: PROBLEM TO BE SOLVED: To increase a recording capacity of a magnetic recording medium of a linear system and to suppress magnetic transfer. SOLUTION: In the magnetic recording medium having magnetic layers 12 and 13 consisting of at least one layer of an obliquely vapor deposited metal magnetic thin film on both principal surfaces of a non-magnetic support 11 of a long shape respectively as information recording layers, recording and reproduction of signals are performed linearly in the longitudinal direction. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2002074643A
公开(公告)日：2002-03-15
申请号：JP2000264827
申请日：2000-09-01
Applicant: SONY CORP
Inventor： MAEDA NAOTO
IPC: G11B5/708
Abstract: PROBLEM TO BE SOLVED: To enhance running durability of a magnetic disk and to suppress the wear of a magnetic head for attaining high density and large capacity recording of a multilayer coating type magnetic recording medium, especially a magnetic disk. SOLUTION: In the magnetic disk having lower layers 21 and upper layers (magnetic layers) 20 formed on the principal surfaces of a non-magnetic substrate 22, a non-magnetic powder having Mohs hardness of >7 and =9 are contained in the upper layers 20.
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公开(公告)号：JP2001052326A
公开(公告)日：2001-02-23
申请号：JP22151599
申请日：1999-08-04
Applicant: SONY CORP
Inventor： MAEDA NAOTO
Abstract: PROBLEM TO BE SOLVED: To improve surface strength without degrading the electromagnetic conversion characteristics. SOLUTION: This medium has a nonmagnetic base 1, a magnetic layer 3 which is formed by applying magnetic paint obtained by kneading at least magnetic powder and a binding agent, a hard carbon protection film 4 formed on the magnetic layer 3, and a lubricant layer 5 formed of a lubricant on the hard carbon protection film 4. The magnetic recording medium has a superior surface strength by having the DLC protection film and lubricant layer formed, and its coefficient of friction is reduced. The medium, therefore, has superior wear resistance and electromagnetic conversion characteristics. Thus, the magnetic recording medium is suitable for high-density recording.
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公开(公告)号：JPH11296843A
公开(公告)日：1999-10-29
申请号：JP15297198
申请日：1998-06-02
Applicant: SONY CORP
Inventor： MATSUMURA SHINICHI , MAEDA NAOTO
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium of which deformation is suppressed as far as possible, by which a good contact state with a magnetic head is assured, of which durability is excellent, by which good recording and reproducing characteristics may be obtd. and a higher linear recording density is realized. SOLUTION: The magnetic recording medium 1 has a nonmagnetic base 2 which consists of a biaxially oriented polyethylene terephthalate film and magnetic layers 3, 4 which are formed on the nonmagnetic base 2 and contain ferromagnetic powder and a high-polymer material. The nonmagnetic base 2 is in the difference Δn1 in the refractive index between the first main surface 2a and the second main surface 2b. The thickness of the nonmagnetic base 2 is preferably >=30 μm and the thermal shrinkage rate at 80 deg.C is preferably . Thermosetting polyisocyanate may be preferably incorporated into the magnetic layers 3, 4.
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公开(公告)号：JP2003059007A
公开(公告)日：2003-02-28
申请号：JP2001246768
申请日：2001-08-15
Inventor： MAEDA NAOTO , OKAWA WATARU
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic head wherein a high density and a large capacity are achieved by using an oblique deposition magnetic tape for a linear magnetic recording/reproducing device and increasing an SN ratio in both of forward and backward directions, and a magnetic recording/reproducing device incorporating the magnetic head.
SOLUTION: This magnetic head for recording information in a magnetic tape by a linear system is constructed in such a manner that saturation magnetic flux density of one metal soft magnetic layer is different from that of a core gap part, for example the case of a movement of a magnetic head to the inclining side of the easy magnetization direction 3 of a magnetic layer 2 with respect to the surface of a nonmagnetic support 1 is set as a forward direction, and in the core gap part 12 of a lead-out side when the magnetic head is moved in the forward direction, a metal soft magnetic layer having a saturation magnetic flux density higher than that of the core gap layer 11 of an introduction side when the magnetic head is moved in the forward direction is formed.
COPYRIGHT: (C)2003,JPOAbstract translation: 要解决的问题：提供一种磁头，其中通过使用用于线性磁记录/再现装置的倾斜沉积磁带和提高前后两个方向的SN比来实现高密度和大容量， 包含磁头的磁记录/重放装置。 解决方案：用于通过线性系统在磁带中记录信息的磁头被构造成使得一个金属软磁性层的饱和磁通密度与芯间隙部分的饱和磁通密度不同，例如运动的情况 将磁头相对于非磁性支撑体1的表面的磁性层2的易磁化方向3的倾斜侧的磁头设定为向前方向，在导出侧的芯间隙部12中， 磁头沿向前方向移动时，形成了当磁头沿向前方向移动时，饱和磁通密度高于导入侧的芯间隙层11的饱和磁通密度的金属软磁性层。
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Patent Agency Ranking
公开(公告)号：JP2000285447A
公开(公告)日：2000-10-13
申请号：JP8462099
申请日：1999-03-26
Applicant: SONY CORP
Inventor： MAEDA NAOTO
IPC: G11B5/84
Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a magnetic recording medium suitable for a system employing a floating magnetic head. SOLUTION: The method for producing a magnetic recording medium comprises a step for coating a nonmagnetic support 1 with a magnetic paint principally comprising a magnetic powder and a binder and drying the magnetic paint to form a magnetic layer, a step for making smooth the surface of the magnetic layer by calendaring, a step for punching the nonmagnetic support 1 formed with the magnetic layer into a disc and making a magnetic disc, and a step for unwarping the magnetic disc by heat treating it at a temperature higher than the glass transition point of the binder and lower than the glass transition point of the nonmagnetic support 1, wherein the temperature rising rate is set at 1.0 deg.C/min or below in the step for unwarping by heat treatment.
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公开(公告)号：JP2002319115A
公开(公告)日：2002-10-31
申请号：JP2001122354
申请日：2001-04-20
Applicant: SONY CORP
Inventor： MAEDA NAOTO
Abstract: PROBLEM TO BE SOLVED: To suppress the wear of a magnetic head while securing electromagnetic conversion characteristics of the magnetic head and to enhance running durability by preventing a coating film destruction due to the sliding with the head by high speed rotation. SOLUTION: In the magnetic head 13 provided with a contact pad 14 for coating the surface facing a magnetic disk of the magnetic head 13 with a material consisting of diamond like carbon, the contact pad 14 consists of a material impregnated with a lubricant, the lubricant consists of a material containing at least one alkylamine and the magnetic head is disposed in the state of sandwiching the magnetic disk wherein magnetic layers are formed on the both principal surfaces of a non-magnetic substrate.
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公开(公告)号：JP2001307316A
公开(公告)日：2001-11-02
申请号：JP2000119984
申请日：2000-04-20
Applicant: SONY CORP
Inventor： MAEDA NAOTO
IPC: C09D5/23 , C09D7/12 , C09D201/00 , G11B5/708
Abstract: PROBLEM TO BE SOLVED: To enhance traveling durability and to restrain a magnetic head from being abraded in order to achieve high-density high-capacity recording of a multiple-layer-coated magnetic recording medium, particularly a magnetic disk. SOLUTION: This magnetic disk has a lower layer 21 and an upper layer (a magnetic layer) 20 formed on each of both main surfaces of a nonmagnetic support 22. The layer 20 contains nonmagnetic powder having 7 or lower Mohs' hardness and nonmagnetic powder having 9 or higher Mohs' hardness.
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公开(公告)号：JP2006120232A
公开(公告)日：2006-05-11
申请号：JP2004306280
申请日：2004-10-21
Inventor： MAEDA NAOTO
IPC: G11B15/67 , G11B23/037 , G11B23/26
Abstract: PROBLEM TO BE SOLVED: To suppress or prevent the transfer of the shape of the joined part of a magnetic tape 4 and a cartridge leader 13 in a magnetic recording/reproducing device which uses a magnetic tape cartridge of one reel type having the cartridge leader 13 connected to the end of the magnetic tape, and incldues a takeup reel hub 23a, and a takeup leader 11 having one end fixed to the reel hub and the other end bonded to the other end of the cartridge leader 13. SOLUTION: A recess 20 is formed on the tape takeup surface of a reel hub 23a in a portion facing the center of the takeup reel hub 23a from the joined part of a magnetic tape 4 and a cartridge leader 13 when a takeup leader 11, the cartridge leader 13 bonded to the takepup leader 11, and the magnetic tape 4 are wound on the takeup reel hub 23a. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract translation: 要解决的问题：为了抑制或防止将磁带4和盒头引导件13的接合部分的形状转移到使用具有一个卷轴的磁带盒的磁记录/再现装置中 盒式磁带引导件13，其连接到磁带的端部，并且包括卷绕卷轴23a，以及卷绕头部11，其一端固定到卷轴盘毂，另一端结合到盒头部13的另一端。
解决方案：当卷带头11，从卷带轮毂23a的接合部分和卷带头13的接合部分的面对卷绕卷轴毂23a的中心部分的卷轴毂23a的卷带表面上形成有凹部20， 接合到记录头部11的盒引导件13和磁带4缠绕在收紧卷轴毂23a上。 版权所有（C）2006，JPO＆NCIPI
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公开(公告)号：JP2001307317A
公开(公告)日：2001-11-02
申请号：JP2000119985
申请日：2000-04-20
Applicant: SONY CORP
Inventor： OKAMOTO KAZUHIRO , SASAKI YUICHI , KOISHIKAWA HATSUE , OKAZAKI YUTAKA , MAEDA NAOTO , KAWASHIMA TAKASHI , KUDO TAKAO , GOTO KAZUO
Abstract: PROBLEM TO BE SOLVED: To enhance durability and reliability by controlling the abrading amount and friction of a head by the high-speed sliding action to be effectively small while maintaining the high-density recording and high transferring rate of a multiple-layer-coated magnetic recording medium, particularly a magnetic disk. SOLUTION: Three kinds of powder consisting of cobalt-containing metallic powder, alumina powder and at least one other inorganic powder selected from inorganic powder of silicon compound, inorganic powder of titanium compound and powder of zirconium oxide are blended in an upper layer (a magnetic layer) 20 of the multiple-layer-coated magnetic disk 3.
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