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公开(公告)号：JP2004362730A
公开(公告)日：2004-12-24
申请号：JP2003384784
申请日：2003-11-14
Inventor： TERAJIMA HIDEKI , TAKAHASHI KIMIO , SATO SATOSHI , NAGAI NOBUYUKI
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium having excellent corrosion resistance, sufficient mechanical strength, excellent smoothness, little cupping, and a good tape shape.
SOLUTION: The magnetic recording medium which has a magnetic layer 2 which is formed by a vacuum thin film forming technique on one major face of a long-sized nonmagnetic support 1 and has a shielding layer 4 which is deposited by a facing target sputtering process on another major face of the nonmagnetic support 1 and in which the absolute value of a/w is ≤0.05 when the cupping in a transverse direction is defined as (a) and the length of the width as w is provided.
COPYRIGHT: (C)2005,JPO&NCIPI-
公开(公告)号：JP2004158131A
公开(公告)日：2004-06-03
申请号：JP2002323434
申请日：2002-11-07
Inventor： SATO SATOSHI
Abstract: PROBLEM TO BE SOLVED: To produce a magnetic tape wherein the archive property, stability in recording and low noise are realized.
SOLUTION: As for the magnetic tape, a magnetic layer 2 is formed directly on a base 1 consisting of one of polyamide, polymide, polyethylene terephthalate and polyethylene naphthalate, and the magnetic layer 2 consists of a cobalt-containing maghemite thin film which contains cobalt in 1 to 10 w%.
COPYRIGHT: (C)2004,JPOAbstract translation: 要解决的问题：制造其档案性能，记录稳定性和低噪声的磁带。 解决方案：对于磁带，磁性层2直接形成在由聚酰胺，聚酰亚胺，聚对苯二甲酸乙二醇酯和聚萘二甲酸乙二醇酯构成的基体1上，磁性层2由含钴的磁赤铁矿薄膜 其含有1至10w％的钴。 版权所有（C）2004，JPO
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公开(公告)号：JP2002304720A
公开(公告)日：2002-10-18
申请号：JP2001110374
申请日：2001-04-09
Applicant: SONY CORP
Inventor： SATO SATOSHI , OKAWA WATARU , YAMAGA MINORU , MAEJIMA KATSUNORI , HIRAI MOTOSUKE
Abstract: PROBLEM TO BE SOLVED: To improve the dimensional stability of a magnetic recording medium against expansion by humidity. SOLUTION: As for the nonmagnetic supporting body 1 constituting the magnetic recording medium, a film produced by forming reinforcing layers 5, 5a, 5b of aluminum, cobalt, chromium or oxides of these with total 4 to 1,000 [nm] film thickness on at least one principal surface of an aromatic polyamide film having 2.0 to 5.0 [μm] film thickness is used. The expansion rate by humidity of the medium in the width direction is specified to
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公开(公告)号：JP2002025042A
公开(公告)日：2002-01-25
申请号：JP2000206990
申请日：2000-07-07
Applicant: SONY CORP
Inventor： SATO SATOSHI
Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic recording medium having a magnetic layer of a ferromagnetic metal thin film which can more effectively suppress curling, which has excellent traveling durability and excellent touching property with a head to make ultrahigh-density recording at high rotation possible. SOLUTION: The magnetic recording medium has a Cr alloy base layer L1, CoCr magnetic layer L2 and protective layer L3 successively and each formed by a vacuum film formation method on a nonmagnetic supporting body 10. The nonmagnetic supporting body 10 is prepared in such a manner that the difference in mechanical strength in the plane, namely, the difference Δn between the maximum and minimum of the refractive index is
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Patent Agency Ranking
公开(公告)号：JP2000348325A
公开(公告)日：2000-12-15
申请号：JP15835799
申请日：1999-06-04
Applicant: SONY CORP
Inventor： SATO SATOSHI , MATSUMURA SHINICHI
Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic recording medium which has good electromagnetic conversion characteristics and traveling property in combination even when an aromatic polyamide is used as a nonmagnetic base. SOLUTION: Fine projections 3 of 10 to 40 nm in height from the central surface are formed at density of 1 million to 20 millions pieces/mm2 on the main surface at least on the side to be formed with a metallic thin film of the nonmagnetic base 1 of the magnetic recording medium constituted by depositing at least a magnetic layer 2 consisting of the metallic thin film on the one main surface of the nonmagnetic base 1. In the bearing curve of the main surface of the nonmagnetic base 1 on the side formed with the fine projections 3, the inclination of a straight line is confined to
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公开(公告)号：JP2000105915A
公开(公告)日：2000-04-11
申请号：JP27616298
申请日：1998-09-29
Applicant: SONY CORP
Inventor： MATSUMURA SHINICHI , SATO SATOSHI
Abstract: PROBLEM TO BE SOLVED: To ensure superior running durability and high reliability in data recording/readout as well as to attain a high recording capacity. SOLUTION: A nonmagnetic substrate 1 used has at least a 1st aromatic polyamide film 5 forming one of the principal surfaces and a 2nd aromatic polyamide film 6 formed on the 1st aromatic polyamide film 5. Inert particles contained in the 1st aromatic polyamide film 5 are coarser than inert particles contained in the 2nd 1st aromatic polyamide film 6. The thickness of the substrate 1 except the 1st aromatic polyamide film 5 is >=2.0 μm.
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公开(公告)号：JPH0954934A
公开(公告)日：1997-02-25
申请号：JP20468995
申请日：1995-08-10
Applicant: SONY CORP
Inventor： SATO SATOSHI , MATSUMURA SHINICHI
Abstract: PROBLEM TO BE SOLVED: To improve the shape of surface protrusions and to obtain a magnetic recording medium having satisfactory running performance and not causing abnormality in image quality. SOLUTION: A metallic magnetic thin film 13 is formed on a nonmagnetic substrate 20. In the resultant magnetic recording medium, ten protrusions are selected from among the protrusions 21 of the substrate 20 in the order of decreasing height within the range of 30μm×30μm and the average shape factor of the ten protrusions 21 is regulated to >=0.55. The shape factor of each of the protrusions is represented by the ratio of the height of the protrusion to the half-width.
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公开(公告)号：JPH02217096A
公开(公告)日：1990-08-29
申请号：JP3803989
申请日：1989-02-17
Applicant: SONY CORP
Inventor： ICHIGAYA KOJI , SATO SATOSHI
IPC: H04N17/04
Abstract: PURPOSE:To simply measure a secular change in the distortion of luminance line electrically with high accuracy by providing a pattern generator, an optical sensor, a memory and a secular distortion calculation means. CONSTITUTION:When a pattern generator 1 outputs a video signal, a luminance line, is displayed on a screen 3 of a CRT 2 and the light irradiating from the luminance line is detected by optical sensors S1-S21. The light intensity data being the detected output of the optical sensors S1-S21 is stored in a memory 10 and a light intensity data stored in the memory 10 is used as a reference data by a secular distortion calculation means 11 and the luminance intensify data being the detection output of the optical sensors measured after the detection of the reference data is used as a comparison data and a difference between the reference data and the comparison data is calculated. Since the light intensity data is changed in response to the position of the luminance line with respect to the optical sensors, the secular distortion of the luminance line is measured from the secular change of the difference data. Thus, the secular change in the luminance line is simply measured electrically with high accuracy.
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公开(公告)号：JPH02213295A
公开(公告)日：1990-08-24
申请号：JP3338389
申请日：1989-02-13
Applicant: SONY CORP
Inventor： SATO SATOSHI , ICHIGAYA KOJI
IPC: H04N17/04
Abstract: PURPOSE:To prevent the lowering of measurement accuracy caused by the lowering of luminance for an luminous line in the beginning of measurement by providing a miss convergence quantity calculating means, defining the luminous line in the beginning of the measurement as a dummy luminous line and excluding the detection output of an optical sensor by this dummy luminous line out of measurement data. CONSTITUTION:The digitized light intensity data of an optical sensor 4 are written to a measurement data memory 7 based on the write signal of a CPU 8. When the measurement is started, the CPU 8 outputs a write control signal so that writing can be started from the second light intensity data. Namely, when the measurement is started, the luminous line in a first frame is defined as the dummy luminous line and the detection output of the optical sensor 4 in this dummy luminous line is excluded out of the measurement data. Accordingly, in the calculation of miss convergence quantity, since the light intensity data, for which there is danger the luminance of the luminous line is lower than an original value, in the beginning of the measurement are not included, the miss convergence quantity of satisfactory accuracy. Then, for the luminous line in the beginning of the measurement, these light intensity data are excluded from the measurement data. As a result, the error of the measurement caused by the lowering of the luminous in the beginning of the measurement is prevented.
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