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公开(公告)号：JPH10172133A
公开(公告)日：1998-06-26
申请号：JP33054296
申请日：1996-12-11
Applicant: KAO CORP
Inventor： SATO MASAYASU , MATSUO YUZO , ISHIWATARI KENJI
Abstract: PROBLEM TO BE SOLVED: To make a recording medium thin and to improve electromagnetic conversion characteristics by forming a first supporting body layer and a vapor deposition layer to constitute a supporting body and controlling the Young's modulus of the supporting body and each thickness of the first supporting body layer and the vapor deposition layer to a specified range. SOLUTION: The supporting body of a magnetic recording medium is a composite layer comprising a first supporting body layer 1 having 1 to 5μm thickness and a vapor deposition layer 2 formed by vapor deposition on at least one surface of the first supporting body layer 1. The Young's modulus of the supporting body of this composite layer is controlled to 900 to 1800kg/mm . The ratio of the thickness t1 of the first supporting body layer 1 to the thickness t2 of the vapor deposition layer 2 is controlled to 2.5 to 12.5. Especially preferably, the Young's modulus of the supporting body comprising the composite layer, thickness t1 of the first supporting body layer 1 and the thickness of the vapor deposition layer 2 and t1/t2 are specified respectively to 900 to 1600kg/mm , 2 to 4.5μm, 2200 to 1000Å and 6 to 12.5.
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公开(公告)号：JPH1088326A
公开(公告)日：1998-04-07
申请号：JP24150896
申请日：1996-09-12
Applicant: KAO CORP
Inventor： MIZUNOYA HIROHIDE , MATSUO YUZO , YAMAMOTO JUN
Abstract: PROBLEM TO BE SOLVED: To provide a thin coating forming device capable of holding a minimum incident angle of a particle to be vapor-deposited to a certain angle and capable of stably obtaining a homogeneous thin coating and furthermore to provide a thin coating forming device capable of reducing the waste of material and moreover capable of easily executing a maintenance. SOLUTION: This device is the one in which the material is evaporated in a vacuum tank, and the evaporated particles are vapor-deposited on a running supporting body 3, by which thin coating is formed on the surface of the supporting body and having a container 5 stored with the material, a sheet 8a allowed to roll-exist from this container, an evaporating means 7 evaporating the material within the container and a shielding member 9 provided between the supporting body and the container, and among the evaporated particles, the ones adhered to the sheet 8a are constituted so as to be recovered within the container, and moreover, the minimum incident angle at which the evaporated particles are vapor-deposited on the supporting body is not prescribed by the sheet but prescribed by the shielding member.
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公开(公告)号：JPH0941141A
公开(公告)日：1997-02-10
申请号：JP19325995
申请日：1995-07-28
Applicant: KAO CORP
Inventor： MIZUNOYA HIROHIDE , MATSUO YUZO , IMAMURA HIDEKI , SHIGA AKIRA
Abstract: PROBLEM TO BE SOLVED: To eliminate the need for preparing many cooling can rolls varying in diameters by arranging the plural unit cooling can rolls to an arc form and moving their axial positions to form a virtual curve having a prescribed radius of curvature. SOLUTION: The respective axes of the unit cooling can rolls 1a to 1i are arranged along the arc of the prescribed radius of curvature. The radius of curvature of the arc is changed by moving the axial positions to change the radius of curvature of the virtual curve formed by connecting the surfaces of the unit cooling can rolls 1a to 1i. A non-management base 2, such as PET film, is supplied along the virtual curve formed by the unit cooling can rolls 1a to 1i from a supply side roll 3a and is sent to a take-up side roll 3b. The inside of a vacuum vessel 9 is exhausted to a prescribed vacuum degree. A magnetic alloy 6 in a crucible 5 is evaporated and splashed by operating an electron gun 7 to deposit the magnetic alloy 6 by evaporation on the base 2. The knowledge on at what diameter of the cooling can rolls need be set in order to form the thin films having good characteristics is easily known.
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公开(公告)号：JPH0935265A
公开(公告)日：1997-02-07
申请号：JP17980395
申请日：1995-07-17
Applicant: KAO CORP
Inventor： MATSUO YUZO , KITAORI NORIYUKI , YOSHIDA OSAMU , MIZUNOYA HIROHIDE , SASAKI KATSUMI , WAKABAYASHI SHIGEMI , SHIGA AKIRA
Abstract: PROBLEM TO BE SOLVED: To easily produce a high S-N ratio magnetic recording medium with magnetic layers having a multilayered magnetic thin film structure. SOLUTION: A substrate is transferred with plural can rolls arranged in a vacuum atmosphere and a magnetic metal is vapor-deposited on the substrate on each of the can rolls to form plural magnetic thin films on the substrate. The can rolls 13, 14 are different from each other in diameter. The can roll 13 on the upper stream side of the transfer path of the substrate 6 has a larger diameter than the can roll 14 on the downstream side and the ratio between the diameters of the rolls 13, 14 is 5:1 to 2:1, preferably 4:1 to 3:1.
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公开(公告)号：JPH0927123A
公开(公告)日：1997-01-28
申请号：JP17213395
申请日：1995-07-07
Applicant: KAO CORP
Inventor： WAKABAYASHI SHIGEMI , KITAORI NORIYUKI , YOSHIDA OSAMU , MIZUNOYA HIROHIDE , SASAKI KATSUMI , MATSUO YUZO , SHIGA AKIRA
Abstract: PROBLEM TO BE SOLVED: To avoid such a problem that a material to be vapor deposited is wound up on a cooling can and to obtain a normal travelling state of the material to be vapor deposited by forming a conductive film on the material before a magnetic layer is formed. SOLUTION: This producing device 10 is equipped with a device 20 for formation of a conductive film which is connected to a vacuum chamber 1 through a connecting pipe 24. The device 20 for formation of a conductive film consists of a vacuum chamber 21 for formation of a conductive film which is connected to the vacuum chamber 1, a travelling device 22 disposed in the vacuum chamber so as to travel a continuous tape 5 as the material to be vapor deposited, a high frequency electric furnace 23 disposed beneath the tape 5, and a conductive material housed in the high frequency electric furnace 23. In this device, a high frequency current is applied on a coil 34 to heat an aluminum material in a crucible 33. The aluminum material is continuously molten and vaporized by the heat. The aluminum vapor deposits on the tape 5 while the tape 5 rotates along the circumference direction of a cooling can 32. During this process, an aluminum conductive film is formed on the tape 5.
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Patent Agency Ranking
公开(公告)号：JPH0927110A
公开(公告)日：1997-01-28
申请号：JP17221995
申请日：1995-07-07
Applicant: KAO CORP
Inventor： MIZUNOYA HIROHIDE , KITAORI NORIYUKI , YOSHIDA OSAMU , SASAKI KATSUMI , MATSUO YUZO , SHIGA AKIRA , ISHIKAWA JUNKO
Abstract: PROBLEM TO BE SOLVED: To improve quality of a magnetic recording medium and to easily produce the medium by forming a base layer containing copper on a supporting body and forming a magnetic layer containing iron and nitrogen on the base layer. SOLUTION: A base layer 2 containing copper is formed by physical vapor deposition on a supporting body 1, and a magnetic layer 3 containing iron and nitrogen is formed by ion-assist physical vapor deposition method on the base layer 2. Because the crystal structure of copper is similar to the crystal structure of the iron nitrogen compd. and vapor deposition of copper on the supporting body is easy, vapor of the iron-nitrogen compd. can be easily deposited compared to the case of forming a magnetic layer 3 directly on the supporting body 1. The base layer 2 contains copper in the form of metal copper, copper compd. or copper alloy. As for the copper compd., CuO is used, and as for the copper alloy, Cu-Al alloy or Cu-Ni alloy can be used. The base layer 2 is preferably formed to 150-350Å thickness.
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公开(公告)号：JPH08329463A
公开(公告)日：1996-12-13
申请号：JP13486295
申请日：1995-06-01
Applicant: KAO CORP
Inventor： ISHIKAWA JUNKO , KITAORI NORIYUKI , YOSHIDA OSAMU , MIZUNOYA HIROHIDE , SASAKI KATSUMI , MATSUO YUZO , SHIGA AKIRA
Abstract: PURPOSE: To effectively use the space in a vacuum chamber and to eliminate time-consuming and complicated processes by providing the device with a heating means which is disposed along a can roll but apart from a crucible. CONSTITUTION: When electron beams are emitted from an electron gun 16 to a magnetic metal 10, the magnetic metal 10 is molten and continuously evaporates by irradiation of the electron beams. A tape 5 released from a releasing roll 6 into a vaporizing region 17 of a crucible 3 is traveled around in the circumference direction on a can roll 8 while the vapor of the magnetic metal deposits on the tape 5 to form a first magnetic layer on the tape. Then the tape 5 is introduced again in the vaporizing zone 18 of a heating means 9, where a second magnetic layer is formed on the first magnetic layer. Then the tape 5 is wound up by a winding roll 7.
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公开(公告)号：JPH08221752A
公开(公告)日：1996-08-30
申请号：JP2285695
申请日：1995-02-10
Applicant: KAO CORP
Inventor： MATSUO YUZO , KITAORI NORIYUKI , YOSHIDA OSAMU , MIZUNOYA HIROHIDE , SASAKI KATSUMI , WAKABAYASHI SHIGEMI , SHIGA AKIRA
Abstract: PURPOSE: To easily produce a magnetic recording medium having many layers of magnetic layers varying in film quality. CONSTITUTION: A base is transported by plural can rolls disposed in a vacuum atmosphere and the plural magnetic layers are formed by vapor deposition on this base. The min. incident angles at the respective can rolls are adjusted by shielding plates 5, etc., in such a manner that the min. incident angle (θ1 ) of the can roll 1 disposed upstream of the transporting route for the base attains the angle larger than the min. incident angle (θ2 ) of the can roll 2 disposed downstream of this can roll.
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公开(公告)号：JPH08161740A
公开(公告)日：1996-06-21
申请号：JP29845794
申请日：1994-12-01
Applicant: KAO CORP
Inventor： KITAORI NORIYUKI , YOSHIDA OSAMU , MIZUNOYA HIROHIDE , SASAKI KATSUMI , MATSUO YUZO , WAKABAYASHI SHIGEMI , SHIGA AKIRA
Abstract: PURPOSE: To achieve uniformity of a film thickness distribution by spraying and supplying a lubricating agent atomized by an ultrasonic wave to an applicator roll to be transferred and applied onto a magnetic layer of a magnetic recording medium. CONSTITUTION: In a magnetic recording medium 3 on the surface of which is formed a magnetic layer comprising a vacuum evaporated thin film made of ferromagnetic metal such as Co, Ni, Fe or an alloy thereof, an ultrasonic wave is applied to a lubricating agent to atomize by a sprayer, running between an the applicator roll 1 and a backup roll 4, comprising an ultrasonic oscillator 2, a vibrator, a horn and the like to be supplied to the applicator roll 1 by a nozzle or the like. The applicator roll 1 transfers the lubricating agent to be applied on the magnetic layer of the magnetic recording medium 3. The lubricating agent herein used is 0.001-1.0 by wt% of a solution in which perfluoropolyether with the molecular weight of 2,000-5,000 is dissolved in perfluorocarbon as solvent. The atomization of the solution by an ultrasonic wave enables coating thereof in a vacuum environment.
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公开(公告)号：JPH08161722A
公开(公告)日：1996-06-21
申请号：JP29692294
申请日：1994-11-30
Applicant: KAO CORP
Inventor： KITAORI NORIYUKI , YOSHIDA OSAMU , MIZUNOYA HIROHIDE , SASAKI KATSUMI , MATSUO YUZO , WAKABAYASHI SHIGEMI , SHIGA AKIRA
Abstract: PURPOSE: To obtain an evaporation type magnetic recording medium which enables the delivering of excellent output characteristics from a low to high band. CONSTITUTION: An evaporation type magnetic recording medium is obtained to let a residual magnetic flux density and a coercive force satisfy relationships as given by formulas (1) and (2).
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