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41. 发明专利

JPH06282841A MAGNETIC RECORDING MEDIUM AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH06282841A
公开(公告)日：1994-10-07
申请号：JP9385293
申请日：1993-03-30
申请人： SONY CORP
发明人： KOBAYASHI TOMIO , SATO KENICHI , UCHIYAMA HIROSHI , CHIBA KAZUNOBU , HIRATSUKA RYOICHI , ARIZAKA YUICHI , TAKEDA TSUTOMU , MORI TAKAO
IPC分类号： G11B5/72 , G11B5/64 , G11B5/65 , G11B5/84
摘要： PURPOSE:To obtain a magnetic recording medium which is excellent in running durability and anticorrosiveness by forming a composite oxide deposited film firmly and closely on a magnetic deposited thin film. CONSTITUTION:In a magnetic recording medium which has a magnetic deposited thin film 2 mainly composed of Co as magnetic layer, a composite oxide deposited film 3 of a two-layer structure comprising an Si oxide matrix layer as protective film and a metal oxide dispersion layer is formed on the magnetic deposited thin film.

42. 发明专利

JPH06282840A MAGNETIC RECORDING MEDIUM AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH06282840A
公开(公告)日：1994-10-07
申请号：JP7211693
申请日：1993-03-30
申请人： SONY CORP
发明人： HIRATSUKA RYOICHI , ONODERA SEIICHI , UCHIYAMA HIROSHI , SATO KENICHI , CHIBA KAZUNOBU
IPC分类号： G11B5/72 , G11B5/64 , G11B5/84
摘要： PURPOSE:To obtain a magnetic recording medium which is excellent in still durability. CONSTITUTION:In the formation of a carbon protective film by at least one method selected from a sputtering method, a CVD method and an ion plating method, the formation of the film is performed with a back pressure in a vacuum chamber below 5X10 Pa or the back pressure in the vacuum chamber below 1X10 Pa and a partial pressure of hydrogen above 1%. Thus, a magnetic recording medium can be produced with the oxygen content of the carbon protective film below 3at% or less.

43. 发明专利

JPH0617250A EXPANDER ROLL 失效
公开(公告)号：JPH0617250A
公开(公告)日：1994-01-25
申请号：JP19628592
申请日：1992-06-30
申请人： SONY CORP
发明人： KATO YOSHIKATSU , HIRATSUKA RYOICHI
IPC分类号： C23C14/56 , G11B5/84
摘要： PURPOSE:To improve the production efficiency by the expander roll by which the wrinkles and frills of a sheet are removed and an expansion effect is obtd. CONSTITUTION:Both ends of the roll 2 of the expander roll 1 are provided with level difference parts 3 having the diameter larger than the diameter of the other parts. The sheet 4 is traveled thereon in an M1 direction, by that, the sheet 4 is stretched in an M2 direction (transverse direction). The surface of the roll 2 is formed to have the coefft. of friction larger than the coefft. of friction of the level difference parts 3. For example, the roll 2 may be formed of a metal and the level difference parts 3 of a high-molecular material.

44. 发明专利

JPH05336548A 失效
公开(公告)号：JPH05336548A
公开(公告)日：1993-12-17
申请号：JP16379392
申请日：1992-05-30
申请人： SONY CORP
发明人： HIRATSUKA RYOICHI , KAWAKAMI KIKUJI , TAKEDA TSUTOMU , SUZUKI KAZUYA
IPC分类号： H04N13/02
摘要： PURPOSE:To obtain an excellent stereoscopic image regardless of whether a subject is distant or close by freely adjusting the distance between both video camera devices and the directions of the respective video camera devices. CONSTITUTION:Camera support plates 8R and 8L are rotated around a center shaft 7 by a support plate driving device and a support plate driving controller arranged corresponding to the support plate driving device, and their mutual angle, i.e., the distance between the right and left video camera devices 1R and 1L is freely adjusted. A couple of camera bases 6R and 6L are rotated by a camera base driving device and a camera base driving controller arranged corresponding to the camera base driving device, and the directions of the couple of video camera devices 1R and 1L are freely adjusted. Then the angle between the camera support plates 8R and 8L and the angles of rotation of the camera bases 6R and 6L are adjusted to align the optical axes of the right and left video camera devices 1R and 1L with the subject.

45. 发明专利

JP2000268356A MANUFACTURE FOR MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JP2000268356A
公开(公告)日：2000-09-29
申请号：JP13617999
申请日：1999-05-17
申请人： SONY CORP
发明人： HIRATSUKA RYOICHI , NISHIDA YASUYO , AMANO SHUNJI , HAYASHI HIROSHI , HOSHI KAZUO
IPC分类号： G11B5/84
摘要： PROBLEM TO BE SOLVED: To make uniformly formable a thin carbon protecting film by conducting a Raman spectroscopic measurement by argon ion laser excitation of a specific wavelength and, controlling the film thickness of a carbon protecting film based on the intensity area of a Raman spectrum including a background because of a fluorescent light appearing to an area of a specific range. SOLUTION: The Raman spectroscopic measurement by argon ion laser excitation of a wavelength of 514.5 nm is carried out to control the film thickness based on the intensity area of a Raman spectrum by a fluorescent light appearing in 1,000-1,800 cm-1. A magnetic recording medium is formed by vapor depositing Co on a polyethylene terephthalate film while introducing oxygen gas, thereby forming a partly oxidized ferromagnetic metallic thin film. A Raman measurement element 22 is connected to a laser oscillator 23 and a Raman spectrograph 24. A Raman spectroscopic system is operated by a computer to manage a film formation condition such as a line speed or the like to make the Raman spectrum constant.

46. 发明专利

JPH10255263A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH10255263A
公开(公告)日：1998-09-25
申请号：JP5270697
申请日：1997-03-07
申请人： SONY CORP
发明人： ITOU YUKA , HIRATSUKA RYOICHI
IPC分类号： G11B5/66 , G11B5/64 , G11B5/72 , G11B5/85
摘要： PROBLEM TO BE SOLVED: To form a protection film that has superior traveling property and durability by using ethylene as a raw material when forming a carbon protection film on a deposition magnetic recording medium by the CVD method and further adding an Ar gas. SOLUTION: A body 1 to be treated where Co is deposited on a PET film that is a non-magnetic support and a metal magnetic thin film is formed is wound by a wind-up roll 4 along a drum-shaped counter electrode 9 from a wind-off roll 3 in a vacuum chamber 11. A potential of +500-2000V is applied to an electrode 6 in a reaction tube 5, a gas where an ethylene/Ar ratio is 2/1-6/1 molar ratio is introduced from a reaction gas introduction port 8, and a diamond-shaped carbon film with a specific thickness is formed on the metal magnetic thin film by the CVD method. Furthermore, a surface carbon film is treated in a plasma surface treatment room 12, thus obtaining the best characteristics where time and a friction coefficient until a reproduction output drops by 3dB are in molar ratio of 3/1.

47. 发明专利

JPH10198953A PRODUCTION OF MAGNETIC RECORDING MEDIUM, AND APPARATUS FOR PRODUCTION OF THE SAME 失效
公开(公告)号：JPH10198953A
公开(公告)日：1998-07-31
申请号：JP35161796
申请日：1996-12-27
申请人： SONY CORP
发明人： MORI TAKAO , HIRATSUKA RYOICHI , KAWANA TAKAHIRO
IPC分类号： G11B5/66 , G11B5/64 , G11B5/72 , G11B5/725 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To obtain a process for production of a long-life magnetic recording medium having excellent corrosion resistance, sliding durability, etc., by providing the process with respective stages for successively forming a hard carbon film and a fluorination treated film on a magnetic layer consisting of a magnetic metallic thin film, treating this fluorination treated film in plasma and forming a fluorine atom-contg. lubricant layer, on the surface and to provide an apparatus therefor. SOLUTION: A raw film 21 provided with the magnetic metallic thin film on a nonmagnetic base is sent into a first reaction chamber 2 on a counter electrode 5 and a prescribed DC voltage is impressed on an electrode 7. A gaseous raw material 15, such as toluene, is introduced into this chamber. At this time, the fluorination treated film is formed on the hard carbon film formed on the magnetic metallic thin film by impressing the prescribed DC voltage on an electrode 9 in a second reaction chamber 3 and introducing a gaseous raw material 16, such as ethylene, into the chamber. The film is sent into a plasma treatment chamber 4 and the fluorine atom-contg. lubricant layer is formed on the fluorination treated film by impressing the prescribed AC voltage on electrodes 13, 14 and introducing a gaseous raw material 17, such as nitrogen, into the chamber. As a result, the magnetic recording medium improved in the corrosion resistance and durability is obtd. by sufficiently adsorbing the lubricant for a long period of time.

48. 发明专利

JPH103653A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH103653A
公开(公告)日：1998-01-06
申请号：JP15441496
申请日：1996-06-14
申请人： SONY CORP
发明人： KAWANA TAKAHIRO , HIRATSUKA RYOICHI , MORI TAKAO , ONODERA SEIICHI
IPC分类号： B32B27/16 , G11B5/735 , G11B5/78 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To prevent the absorption of a lubricant into a back coating layer, to prevent the decrease of a lubricant, to obviate a change with lapse of time and to obtain reliability by forming a surface treated layer by a plasma treatment with silicon and gaseous fluorine on the surface of the back coating layer. SOLUTION: This magnetic recording medium is obtd. by forming a magnetic layer 2 consisting of Fe, Co, etc., on one surface of a base film 1, providing the surface of this layer with a protective film 3 consisting of carbon as a main pigment. Further, a lubricant 4 is applied on this protective film 3 for improving the sliding of the magnetic recording medium. A back coating layer 5 contg. carbon is applied and formed on the opposite surface of the base film 1. Further, the surface thereof is subjected to a plasma treatment with the silicon and the gaseous fluorine, by which the surface treated layer 6 is formed. The surface treated layer 6 is formed on the back coating layer 5 in such a manner, by which the absorption of the lubricant 4 into the back coating layer is prevented as the surface treated layer 6 spills the lubricant 4. The decrease of the lubricant is thus prevented. A magnetic recording tape which is free from the change in the durability with lapse of time and has the high reliability is obtd.

49. 发明专利

JPH103650A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH103650A
公开(公告)日：1998-01-06
申请号：JP15441596
申请日：1996-06-14
申请人： SONY CORP
发明人： KAWANA TAKAHIRO , MORI TAKAO , HIRATSUKA RYOICHI , ONODERA SEIICHI
IPC分类号： C01B31/02 , C23C16/26 , G11B5/64 , G11B5/72
摘要： PROBLEM TO BE SOLVED: To improve the weatherability and reliability of a magnetic recording medium and to enable the long-term preservation of the magnetic recording medium by reforming the surface of a protective film by the plasma of silicon and fluorine and forming silicon-fluorine on the surface. SOLUTION: The magnetic recording medium 10 is formed with a magnetic layer 2 by a physical vapor growth PVD technique for evaporating ferromagnetic metallic materials, such as Fe and Co, by heating under vacuum to directly deposit this materials on one surface of a base film 1. The surface thereof is provided with the protective film 3 consisting of a gaseous mixture composed of gaseous siloxane and gaseous hydrogen carbonate as a raw material. Next, the surface thereof is subjected to the reforming of the surface of the protective film 3 by the plasma obtd. by converting silicon and fluorine to plasma to form a reformed part 4. The opposite surface of the base film 1 is provided with a back coating layer. The siliconfluorine are formed on the surface of the protective film obtd. by reforming the surface of the protective film consisting essentially of carbon with the silicon and fluorine in such a manner, by which the weatherability and reliability of the magnetic recording medium are improved and the utilization to the magnetic recording medium requiring long-term preservation is made possible.

50. 发明专利

JPH09320044A MAGNETIC RECORDING MEDIUM AND ITS MANUFACTURE 失效
公开(公告)号：JPH09320044A
公开(公告)日：1997-12-12
申请号：JP16077496
申请日：1996-05-31
申请人： SONY CORP
发明人： HIRATSUKA RYOICHI , KAWANA TAKAHIRO , HISAMICHI YASUYO
IPC分类号： C23C16/26 , C23C16/50 , G11B5/64 , G11B5/72 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To obtain a highly reliable magnetic recording medium and its manufacture, by setting a protecting film of a surface coat ratio of not smaller than a fixed value on a magnetic layer and largely improving the slide durability of the magnetic layer. SOLUTION: The protecting film of a surface coat ratio of 80% or larger is formed on a magnetic layer. The pressure when the protecting film is formed is set to be 100Pa or smaller, so that the surface coat ratio of the protecting film of 80% or larger is attained. The magnetic recording medium of superior slide durability is thus obtained. The diagram indicates a reaction pressure when the carbon protecting film is formed on the magnetic layer and a change of a level down due to the surface coat ratio of the carbon protecting film when a shuttle runs. More specifically, if the pressure when the carbon film is formed is not larger than 100Pa and the coat surface ratio of the carbon film is not smaller than 80%, a good result than the level down is smaller is achieved in a shuttle run test. In contrast, if the pressure exceeds 100Pa, the surface coat ratio of the carbon film is decreased and the level down at the test is extremely increased, bringing about a poor result.

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