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公开(公告)号：JPH06267054A
公开(公告)日：1994-09-22
申请号：JP20169093
申请日：1993-08-13
Applicant: BASF MAGNETICS GMBH
Inventor： GERUTO FUITSUSHIYAA , ARUFUREETO HAAGEMAIAA , HARUTOMUUTO HIBUSUTO
Abstract: PURPOSE: To obtain a magnetic recording medium which is constituted of a sheet-shaped polymer substrate and a metallic contact thin layer formed on a treated main surface of the substrate by a PVD method, having 50 to 1000nm thickness, being ferromagnetic and containing cobalt and which causes no cracking, has no internal stress, is uniform and mechanically stable. CONSTITUTION: The magnetic recording medium is constituted of the sheet- shaped polymer substrate at least one main surface of which is pretreated by ion etching and the metallic contact thin layer which is formed on the treated main surface of the substrate by the PVD method, has 50 to 1000nm thickness, is ferromagnetic and contains cobalt. At least the main surfaces of the substrate for the metallic thin layer are denatured in advance by ion etching with a gas containing nitrogen or oxygen.
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公开(公告)号：JPH06168437A
公开(公告)日：1994-06-14
申请号：JP20168893
申请日：1993-08-13
Applicant: BASF MAGNETICS GMBH
Inventor： GERUTO FUITSUSHIYAA , ARENTO BUERUNAA , HARUTOMUUTO HIBUSUTO
IPC: C23F4/00 , C23C14/02 , C23C14/20 , G11B5/64 , G11B5/66 , G11B5/73 , G11B5/84 , G11B5/85 , G11B5/851
Abstract: PURPOSE: To provide a magnetic recording medium which has improved recording characteristics and is formed with a magnetic layer on a substrate sheet subjected to a plasma treatment. CONSTITUTION: This magnetic recording medium consists of a sheet-like polymer substrate subjected to the plasma treatment on at least one surface of its main surfaces and the ferromagnetic layer of 10 to 1000nm thickness formed on the main surface subjected to the plasma treatment of the substrate. The main surface of the substrate for formation of such ferromagnetic layer is previously treated by at least two kinds of different plasma methods, such as ion beam etching and sputter etching.
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公开(公告)号：JPH05101383A
公开(公告)日：1993-04-23
申请号：JP7688692
申请日：1992-03-31
Applicant: BASF MAGNETICS GMBH
Inventor： HANSU YURUGEN RIHITAA , HARUTOMUUTO HIBUSUTO , GERUTO FUITSUSHIYAA
Abstract: PURPOSE: To provide a process for producing a magnetic recording medium of a metallic thin layer type which does not exhibit the defect of the loss of the residual induction to be induced at the time of reproduction while the deviation from the desirable magnetic direction of the magnetic recording medium produced by the conventional method brings about such loss and more particularly the magnetic recording medium of the metallic thin film type of which the projection of the desirable magnetic direction with respect to a tape surface is aligned to an average recording direction. CONSTITUTION: The magnetic recording medium substantially consisting of a polymer band-like substrate guided on a cylindrical drum and more particularly a roller-shaped cooling drum and the tightly adhesive thin layer of a ferromagnetic material is produced by forming the vapor jet of this ferromagnetic material from an evaporating device 6 to which this material is supplied in a reduced pressure chamber 1 and depositing the vapor jet by evaporation on this substrate. At this time, the vapor jet 7 is brought into collision against the substrate 2 at the angle different from 90 deg.. The revolving shaft of the cylindrical drum 4 for guiding the substrate is inclined with respect to the plane of the evaporating device 6.
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公开(公告)号：JPH06187638A
公开(公告)日：1994-07-08
申请号：JP15353393
申请日：1993-06-24
Applicant: BASF MAGNETICS GMBH
Abstract: PURPOSE: To maximize the yield of a magnetic material by using a PVD method by vapor deposition of the magnetic material in an oblique angle direction at the time of forming a thin-film metallic layer on a polymer substrate. CONSTITUTION: The web-like substrate 2 passes over such a drum-like supporting body 1 which has a radius R and of which the revolving shaft is the origin of an x/y coordinate system. Coating screens 3, 3' condense the metallic vapor jet from a crucible evaporator 4 onto the substrate 2 at the point of a range 5. The angel range opened for coating on the substrate 2 is regulated by graduation angles Φ1 , Φ2 and is determined by the position of the evaporator 4. The coordinate base point of the angles Φ2, Φ1 is calculated in the counterclockwise direction starting from the position Xaxis of the coordinate system existing at the revolving shaft of the drum-like supporting body 1. The coordinate system of the evaporator 4 is like equation I. In the equation, A: the max. value of the quantity of the metal vapor butting against the substrate 2, β1 , β2 : the angles between the central perpendicular line of the evaporator 4 and the line connecting the center of the evaporator 4 and the ends of the coating screens 3, 3', (n): the evaporation rate specific to the evaporating metal source and is a value of 2 to 5.
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公开(公告)号：JPH06162497A
公开(公告)日：1994-06-10
申请号：JP19851493
申请日：1993-08-10
Applicant: BASF MAGNETICS GMBH
Inventor： GERUTO FUITSUSHIYAA , ARUFUREETO HAAGEMAIAA , GEERUHARUTO KOTSUKUSU , HARUTOMUUTO HIBUSUTO
Abstract: PURPOSE: To enable the increase of perpendicular coercive force and saturation magnetization without rising a substrate temp. and to improve a reproducing level by subjecting a polymer substrate film to a plasma pretreatment by etching using a prescribed gas then depositing a magnetic material layer by evaporation. CONSTITUTION: The magnetic recording medium formed by laminating cobalt/ chromium layers of coherent ferromagnetic thin layers on the polymer material is subjected to the plasma pretreatment by ion etching or plasma etching using the nitrogen- or oxygen-contg. gas. At this time, the magnetic moment per cobalt atom in the magnetic layer is increased and the perpendicular coercive force is increased. As a result, the recording properties and reproducing level are improved without rising the temp. of the substrate.
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Patent Agency Ranking
公开(公告)号：JPH04315818A
公开(公告)日：1992-11-06
申请号：JP645792
申请日：1992-01-17
Applicant: BASF MAGNETICS GMBH
Inventor： HANSU YUUGEN RIHITAA , HARUTOMUUTO HIBUSUTO , GERUTO FUITSUSHIYAA
Abstract: PURPOSE: To provide a method for producing a magnetic recording medium of a thin layer metallic layer type of which the desirable magnetic bearing on a tape surface coincides with an average recording direction. CONSTITUTION: At the time of depositing the vapor jet 7 of a magnetic material generated from an evaporator unit 6 housing the magnetic material in a reduced pressure chamber 1 by evaporation on a base 2, the center line of the evaporator unit is moved transversely in the axial direction of a drum with respect to the center line of the base surface and is arranged. The direction of the vapor jet is controlled by a shutter 9, the which the specific direction is imparted to the magnetic material deposited by evaporation.
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公开(公告)号：JPH06259742A
公开(公告)日：1994-09-16
申请号：JP20168993
申请日：1993-08-13
Applicant: BASF MAGNETICS GMBH
Inventor： GERUTO FUITSUSHIYAA , ARUFUREETO HAAGEMAIAA , HARUTOMUUTO HIBUSUTO
Abstract: PURPOSE: To obtain a magnetic recording medium which causes no cracking, has no internal stress, is uniform and mechanically stable. CONSTITUTION: The magnetic recording medium is constituted of a sheet-shaped polymer substrate at least one main surface of which is pretreated by plasma etching and a metallic contact thin layer which is formed on the treated main surface of the substrate by a PVD method, has 50 to 1000nm thickness, is ferromagnetic and contains cobalt. At least main surfaces of the substrate for the metallic thin layer are denatured in advance by plasma etching with a gas containing at least 5vol.% of oxygen.
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公开(公告)号：JPH06158286A
公开(公告)日：1994-06-07
申请号：JP19953893
申请日：1993-08-11
Applicant: BASF MAGNETICS GMBH
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9.发明专利
公开(公告)号：JPH06157786A
公开(公告)日：1994-06-07
申请号：JP18975493
申请日：1993-07-30
Applicant: BASF MAGNETICS GMBH
Inventor： GERUTO FUITSUSHIYAA , ARUFUREETO HAAGEMAIYAA , HARUTOMUUTO HIBUSUTO , HANSU YURUGEN RIHITAA , HANSUUPEETAA SHIRUTOBERUKU , SHIRUBUAN RAZAARU , MATEIASU BORE
IPC: C08J7/00 , B23K26/00 , B29C35/08 , B29C59/16 , C08G63/88 , C08J5/18 , G11B5/73 , G11B5/84 , H05K3/38
Abstract: Sheet-like PET materials having slight surface roughness consisting of fine dot patterns in the submicron range are produced by double successive exposure of the surfaces to polarized UV light produced by a pulsed excimer laser and having planes of polarization arranged at an angle of from 20 DEG to 90 DEG relative to one another, and the PET films treated in this manner are used as a substrate for thin ferromagnetic metal layers.
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公开(公告)号：JPH05101384A
公开(公告)日：1993-04-23
申请号：JP7688892
申请日：1992-03-31
Applicant: BASF MAGNETICS GMBH
Inventor： HANSU YURUGEN RIHITAA , HARUTOMUUTO HIBUSUTO , GERUTO FUITSUSHIYAA
Abstract: PURPOSE: To provide a process for producing a magnetic recording medium of a metallic thin layer type of which the projection of the desirable magnetic direction with respect to a tape surface is aligned to an average recording direction. CONSTITUTION: The magnetic recording medium is produced by forming a vapor jet 7 of a ferromagnetic material from an evaporating device 6 to which this material is supplied in a reduced pressure chamber 1 and depositing the vapor jet by evaporation on polymer band-like substrates guided on a cylindrical drum. At this time, the vapor jet 7 is brought into collision against the substrates 2, 2' at the angle different from 90 deg.. The vapor jet 7 of the ferromagnetic material injected form the evaporating device 6 toward the cylindrical drums 4, 4' in the reduced pressure chamber 1 is brought into contact with the surfaces of two sheets of the band-lie substrates 2, 2' guided in the direction facing each other on two pieces of the separate cylindrical drums 4, 4' at the angle not below 30 deg. and not over 90 deg.. The evaporating device 6 is shifted in the axial line direction of the drums so as to be arranged between two pieces of the cylindrical drums 4, 4'.
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