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1. 发明专利

JPS58224436A Magnetic disk 失效
标题翻译：磁性盘
公开(公告)号：JPS58224436A
公开(公告)日：1983-12-26
申请号：JP10691882
申请日：1982-06-23
申请人： Hitachi Ltd
发明人： ABE KATSUO , NAKAGAWA YOSHIO , TAKAGAKI TOKUSUKE , OOISHI MAKOTO , NAKAMURA TAKAO
IPC分类号： G11B5/66 , G11B5/64 , G11B5/73 , G11B5/738 , G11B5/82 , G11B5/851 , H01F10/26
CPC分类号： G11B5/851
摘要： PURPOSE:To obtain a magnetic disc free from surface defects, superior in etching resistance, and high in reliability, by forming a thin nonmagnetic iron oxide film on an aluminum or its alloy base, and on this film a thin ferromagnetic iron oxide film. CONSTITUTION:The thin nonmagnetic film 3 of alpha-Fe2O3 is formed on a base plate 4 made of aluminum or alloy consisting mainly of it in the presence of gaseous argon contg. a prescribed amt. of O2 in a reduced pressure by the high frequency wave sputtering method, and a Fe3O4 layer is formed on the layer 3 by the sputtering method, and then, it is oxidized under heating at 300 deg.C to convert it into a ferromagnetic iron oxide layer 2 of gamma-Fe2O3. Otherwise, the film 3 is reduced in a gaseous H2 stream to form an Fe3O4 layer down to a prescribed depth from the surface, and it is oxidized under heating to give gamma- Fe2O3 and the layer 2 is formed on this layer 3 converted. Next, a lubricant and protective layer 1 is formed on the layer 2. Since the layer 3 is good in etching resistance and it prevents diffusion of Fe or O into the base 1 and also diffusion of aluminum into the layer 2 and deterioration of magnetic characteristics during formation of the layer 2, a superior magnetic disc is obtained.
摘要翻译：目的：通过在铝或其合金基体上形成薄的非磁性氧化铁膜，在该薄膜上形成薄的铁磁性氧化铁膜，以获得没有表面缺陷，耐腐蚀性优异，可靠性高的磁盘。构成：α-Fe2O3的薄的非磁性膜3形成在由铝或合金制成的基板4上，其主要由其在气态氩气存在下组成。一个规定的通过高频波溅射法在减压下，通过溅射法在层3上形成Fe 3 O 4层，然后在300℃加热下氧化，将其转化为铁磁性氧化铁 γ-Fe2O3层2。否则，膜3在气态H 2流中还原形成从表面到规定深度的Fe 3 O 4层，并且在加热下被氧化以得到γ-Fe 2 O 3，并且在该层3上形成层2。接下来，在层2上形成润滑剂和保护层1.由于层3具有良好的耐蚀刻性，并且防止Fe或O扩散到基体1中，并且还将铝扩散到层2中并降低磁特性在层2的形成期间，获得了优异的磁盘。

2. 发明专利

JPS58158026A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPS58158026A
公开(公告)日：1983-09-20
申请号：JP3952782
申请日：1982-03-15
申请人： HITACHI LTD
发明人： KAIZUKA TAKANORI , OOISHI MAKOTO
IPC分类号： C08L27/12 , G11B5/02 , G11B5/64 , G11B5/66 , G11B5/72 , G11B5/73
摘要： PURPOSE:To improve durability, etc., by disposing a thin magnetic film for recording by vertical magnetization between a base film and a thin layer of an auxiliary medium. CONSTITUTION:A magnetic recording medium 7 which is used by a system for recording by vertical magnetization by using a main magnetic pole 1 and an auxiliary magnetic pole 2 is constituted by forming a Co-Cr film or the like for recording by vertical magnetization between a base 6' of a fluororesin or the like and a thin layer 5 of an auxiliary medium consisting of a high magnetically permeable material such as ''Permalloy ''.

3. 发明专利

JPS56146668A BURNISHING PROCESS 失效
公开(公告)号：JPS56146668A
公开(公告)日：1981-11-14
申请号：JP3038680
申请日：1980-03-12
申请人： HITACHI LTD
发明人： OOISHI MAKOTO
IPC分类号： B24B39/06 , B24B39/00
摘要： PURPOSE:To attain favorable burnishing effect without damage on the work in such a way that an electromagnet is excited by alternating current, and peak pressure and average pressure are properly controlled. CONSTITUTION:In a burnishing process to smooth surfaces of aluminum base plate and magnetic pellicle of a magnetic disc, or the like, electric current is flowed from an electric current source 5 to coils 4, 4', burnishing heads 4, 4' are magnetized to each other, by which the burnishing heads 4, 4' are pushed to the upper and lower surfaces of the magnetic disc 1. Electric current to be flowed to the coils 4, 4' is alternating current which includes direct current bias content, average pressure is determined by the direct current bias content, and peak pressure is determined by the peak of the alternating currrent content. Actual burnishing effect can be attained at the time of this peak pressure. This process facilitates to attain favorable burnishing effect without damage on the work.

4. 发明专利

JPS5647957A MAGNETIC HEAD SLIDER 失效
公开(公告)号：JPS5647957A
公开(公告)日：1981-04-30
申请号：JP10126479
申请日：1979-08-10
申请人： HITACHI LTD
发明人： OOISHI MAKOTO
IPC分类号： G11B5/60 , G11B21/21
摘要： PURPOSE:To prevent the deposition of dust at the rear end of a magnetic head slider by providing pores, penetrating the floating surface and rear flank, at the read end of the slider. CONSTITUTION:Magnetic head slider 10 is provided with plural and fine pores 4, penetrating the floating surface and rear flank, at read end B of the slider. As a result, air flow is blown out of the slider rear flank by way of pores 4 of the floating surface. Therefore, the generating of a vortex of a following wake at the slider rear flank can be prevented. The said constitution can prevent dust from being deposited at the rear end of slider 10. Therefore, a head crush, damage of a disk, etc., due to a deposit of dust can be prevented.

5. 发明专利

JPH0245245B2 失效
公开(公告)号：JPH0245245B2
公开(公告)日：1990-10-08
申请号：JP3389481
申请日：1981-03-11
申请人： HITACHI LTD
发明人： ISHIHARA HEIGO , KATO YOSHIKI , IMAMURA MASAAKI , KAWAKUBO YOICHI , SEO YOSUKE , YAMADA KAZUO , OOISHI MAKOTO , FUKUYA HAJIME , MAEDA FUJIO , OOTANI JUICHI
IPC分类号： G11B5/84 , G11B5/842

6. 发明专利

JPS6212562B2 失效
公开(公告)号：JPS6212562B2
公开(公告)日：1987-03-19
申请号：JP7572079
申请日：1979-06-18
申请人： HITACHI LTD
发明人： OOISHI MAKOTO
IPC分类号： G11B5/82 , G11B5/55 , G11B5/56 , G11B5/596 , G11B21/10 , G11B21/24 , G11B23/00

7. 发明专利

JPS591163A Method of working base plate 失效
标题翻译：基板工作方法
公开(公告)号：JPS591163A
公开(公告)日：1984-01-06
申请号：JP10971582
申请日：1982-06-28
申请人： Hitachi Ltd
发明人： NAKAMURA TAKAO , OOISHI MAKOTO
IPC分类号： G11B5/84 , B24B39/06
CPC分类号： B24B37/048
摘要： PURPOSE:To obtain an ultra-highly accurate smooth surface of a base plate, by controlling the tip angle, pressing force, scratching speed, etc. of a diamond press-element having grooves each defined by convex parts for cutting fine projections on the surface of the base plate and a concave part for exhausting the removed projections. CONSTITUTION:The floated height of a vanishing head 2 floated above a disc base plate 1 is controlled by a chaning the rotational speed of the disc 1. That is, when the floated height is reduced due to the lowering of the speed, a reciprocating seek is carried out for removing fine projections 3 by controlling the speed at a constant value in accordance with an electrically detected signal which is generated upon convex parts of grooves 4 formed in the slider surface of the head 2 being touched to the fine projections 3. The surfaces of the magnetic disc base plate 1 is subjected to surface-treatment with a liquid or solid lubricant for preventing the surface of the base plate from being deteriorated due to the friction of the vanishing head, and for promoting the exhausting of the removed fine projections.
摘要翻译：目的：通过控制金刚石压力元件的尖端角度，压力，划痕速度等获得极高精度的平板表面，该金刚石压力元件具有由凸起部分限定的凹槽，用于切割表面上的微小突起和用于排出去除的突起的凹部。构成：浮动在盘基板1上方的消失头2的漂浮高度通过改变盘1的旋转速度来控制。即，当浮动高度由于速度降低而减小时，往复式寻道通过根据形成在头部2的滑块表面的凹槽4的凸部上产生的电检测信号，将速度控制在恒定值来进行微细突起3的移除，微细突起3被接触。用液体或固体润滑剂对磁盘基板1的表面进行表面处理，以防止基板的表面由于消失头的摩擦而劣化，并且为了促进去除的细突起的排出。

8. 发明专利

JPS563434A MAGNETIC DISK FOR POSITIONING ADJUSTMENT 失效
公开(公告)号：JPS563434A
公开(公告)日：1981-01-14
申请号：JP7572079
申请日：1979-06-18
申请人： HITACHI LTD
发明人： OOISHI MAKOTO
IPC分类号： G11B5/82 , G11B5/55 , G11B5/56 , G11B5/596 , G11B21/10 , G11B21/24 , G11B23/00
摘要： PURPOSE:To realize the control to a pair of magnetic heads with just one execution, by providing two adjacent tracks with different bit patterns recorded to both surfaces of the positioning adjusting magnetic disk of the magnetic disk driving unit access mechanism. CONSTITUTION:Two tracks 11a and 12a which are adjacent concentrically are provided on the surface of positioning adjusting magnetic disk 10 to secure recording of different bit patterns 21 and 22. In the same way, tracks 11b and 12b are provided on the back of dish 10 with the position coincidence to tracks 11a and 12a each. Then bit pattern 22' having the inverted polarization direction to pattern 22 is recorded on track 11b; while bit pattern 21' having the inverted polarization direction to pattern 21 is recorded on track 12b respectively. The bit-inverted positions have an agreement among patterns 21', 22', 21 and 22 each. And these tracks are provided along the circumference of disk 10.

9. 发明专利

JPS55129936A VANISHER 失效
公开(公告)号：JPS55129936A
公开(公告)日：1980-10-08
申请号：JP3689079
申请日：1979-03-30
申请人： HITACHI LTD
发明人： OOISHI MAKOTO
IPC分类号： G11B5/84
摘要： PURPOSE:To subject the surface of a recording medium to vanish finishing surely and stably, by controlling rotation drive of the disc-shaped recording medium according to force acted on a vanishing head. CONSTITUTION:Force corresponding to vanish force is applied to vanishing head 2 incorporated in carriage 9. Force changed by the relative speed between rotating magnetic disc 1 and head 2 is detected by sensor 3 such as a strain gauge, and motor 6 for driving disc 1 is controlled through motor driving circuit 7 according to the detection output, and rotation drive of disc 1 is so controlled that vanish force may be a value within a required proper range, thus vanishing and smoothing always protrusions in the inside part and the outside part of disc 1, which are different in rotation speed, surely and stably independently of heavy and light loads.

10. 发明专利

JPS6256573B2 失效
公开(公告)号：JPS6256573B2
公开(公告)日：1987-11-26
申请号：JP3952782
申请日：1982-03-15
申请人： HITACHI LTD
发明人： KAIZUKA TAKANORI , OOISHI MAKOTO
IPC分类号： C08L27/12 , G11B5/02 , G11B5/64 , G11B5/66 , G11B5/72 , G11B5/73

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