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1. 发明专利

JPH0827935B2 失效
公开(公告)号：JPH0827935B2
公开(公告)日：1996-03-21
申请号：JP30553086
申请日：1986-12-23
申请人： ASAHI GLASS CO LTD
发明人： TAKAKUSA TOSHIHARU , TAKEHARA MIKIO
IPC分类号： G11B5/82 , G11B5/73 , G11B5/84

2. 发明专利

JPH02168419A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH02168419A
公开(公告)日：1990-06-28
申请号：JP32191788
申请日：1988-12-22
申请人： ASAHI GLASS CO LTD
发明人： TAKEHARA MIKIO , ANDO HIDEKAZU , SUZUKI KOICHI , MAKINO ICHIRO , MATSUMOTO KIYOSHI , ISEDA TORU
IPC分类号： G11B5/72
摘要： PURPOSE:To improve the wear resistance by forming the outermost layer of a protection film formed on the upper part of a magnetic recording film at the air side with an oxide film. CONSTITUTION:A protection film is provided on a magnetic recording film of a magnetic recording medium and the outermost layer of the protection film at the air side is made of an oxide film. The oxide film is preferably made of an oxide film represented by M.Nx.Oy (x, y depict an atomic ratio of N and O with respect to one atom of M) including at least one (expressed in M) selected out of a group of Ti, Zr, Hf, Sn, Ta and In and at least one (expressed in N) selected from B or Si, an oxide including especially Zr and B or Zr, Hf and B is preferred because the oxide is excellent in the wear resistance and the chemical stability. Thus, the magnetic recording medium having a protection film with excellent wear resistance is obtained.

3. 发明专利

JPH11213869A METHOD FOR FORMING PROTECTIVE FILM OF AC-TYPE PLASMA DISPLAY PANEL, AND DEVICE THEREOF 失效
公开(公告)号：JPH11213869A
公开(公告)日：1999-08-06
申请号：JP969398
申请日：1998-01-21
申请人： ASAHI GLASS CO LTD
发明人： TAKEHARA MIKIO
IPC分类号： C23C14/32 , H01J9/02 , H01J9/20 , H01J11/40 , H01J17/49
摘要： PROBLEM TO BE SOLVED: To stably form a protective film which is mainly composed of homogeneous (111) oriented MgO crystal over the entire surface of the upper layer of a dielectric layer at a high speed by making a raw material vapor flow interact with a plasma formed between a plasma generating source and an anode electrode. SOLUTION: A raw material vapor flow 17 formed by evaporation or sublimation in a raw material evaporating part 2 is carried towards the surface of a dielectric layer 18 of AC-PDP. On the other hand, electrons or plasmas 19 generated by a plasma generating source 4 are supplied into a vacuum tank 1 to form the existing region of a plasma flow 20. At this time, the raw material vapor flow 17 crosses the present region of the plasma flow 20 and also interacts with the plasma 19. When a raw material containing 50% or more of Mg metal is used, a gas containing a prescribed quantity of oxygen is preferably introduced through a reaction gas inlet port arranged on the sidewall 14 of the vacuum tank 1. The raw material vapor flow 17 then reaches the surface of the dielectric layer 18 to form a protective film which is composed mainly of MgO crystal.

4. 发明专利

JPS6061701A LENS ARRAY 失效
公开(公告)号：JPS6061701A
公开(公告)日：1985-04-09
申请号：JP16930183
申请日：1983-09-16
申请人： ASAHI GLASS CO LTD
发明人： TAKATSUKA TOYOMITSU , TAKAKUSA TOSHIHARU , TAKEHARA MIKIO
IPC分类号： G02B3/00
摘要： PURPOSE:To maintain the adequate position relation with a photoelectric sensor even if temp. and humidity fluctuate and to prevent the fluctuation of the optical axis by fixing respective lens elements by means of an adhesive agent and packing further a rubber-like elastic material into the space betweens the lens elements. CONSTITUTION:Lens elements L1, L2, ..., Ln each having a convex lens on one side are formed of a transparent plastic resin such as acryl or polycarbonate. These lens elements are connected by joining materials 5 and are formed into an array shape. The materials 5 consist of a rubber or foamed urethane resin. The lens array is further adhered and united by an adhesive agent 3 to a phptoelectric sensor 4 formed on a ceramic or metallic base plate. The expansion and shrinkage of the respective lens elements are absorbed or compensated by the material having rubber-like elasticity, by which the optical axis of each lens element is made hardly deviatable and the adequate positional relation between each lens element and a photoelectric sensor is maintained.

5. 发明专利

JPH07151901A HIGH QUALITY MULTILAYER FILM AND ITS PRODUCTION 失效
公开(公告)号：JPH07151901A
公开(公告)日：1995-06-16
申请号：JP29709993
申请日：1993-11-26
申请人： ASAHI GLASS CO LTD
发明人： TAKEHARA MIKIO
IPC分类号： G02B5/28 , C23C14/08 , C23C14/32 , G02B1/10 , G02B1/115 , G02B1/14
摘要： PURPOSE:To obtain a high quality and highly stable film which is dense and optically stable and has high refractive index, good heat resistance, and good gas cut-off property by forming a layer containing crystalline Ta oxides. CONSTITUTION:At least one layer containing crystalline Ta oxides is formed. As for Ta oxides, not only Ta2O3 but non-stoichiometric Ta oxides are used. It is preferable that a high refractive index layer having >=1.7 refractive index in the structural layers of the multilayer film consists of the layer containing crystalline Ta oxides. In the production method of the multilayer film having at least one layer containing crystalline Ta oxides, the layer containing crystalline Ta oxides is preferably produced in vacuum of

6. 发明专利

JPH03156724A MAGNETIC RECORDING MEDIUM AND ITS PRODUCTION 失效
公开(公告)号：JPH03156724A
公开(公告)日：1991-07-04
申请号：JP4713890
申请日：1990-03-01
申请人： ASAHI GLASS CO LTD
发明人： MAKINO ICHIRO , MITSUI AKIRA , TAKEHARA MIKIO , ANDO HIDEKAZU , EBISAWA JUNICHI , SUZUKI KOICHI , MATSUMOTO KIYOSHI , ISEDA TORU , SUZUKI SUSUMU
IPC分类号： G11B5/72 , G11B5/64 , G11B5/84
摘要： PURPOSE:To improve corrosion resistance and wear resistance of the medium by providing a protective film comprising at least one layer on the upper side of a magnetic recording film and constituting the protective film to have an oxide layer as the most outer layer exposed to air. CONSTITUTION:The protective film is formed to prevent microcorrosion and to reduce inner stress by selecting the ratio of Zr/B, Zr/Si or Zr/(B+Si) in a proper range. Namely, by reducing the ratio of Zr/B, Zr/Si or Zr/(B+Si) and increasing the number of atoms of B, Si or (B+Si), inner stress can be reduced. By this method, the protective film can maintain enough corrosion resistance and good wear resistance even when the film is as thin as 100 - 500 Angstrom thickness.

7. 发明专利

JPS63160010A GALSS BASE FOR MAGNETIC DISK AND ITS MANUFACTURE 失效
公开(公告)号：JPS63160010A
公开(公告)日：1988-07-02
申请号：JP30553086
申请日：1986-12-23
申请人： ASAHI GLASS CO LTD
发明人： TAKAKUSA TOSHIHARU , TAKEHARA MIKIO
IPC分类号： G11B5/82 , G11B5/73 , G11B5/84
摘要： PURPOSE:To improve the CSS (contact start stop) performance and the head stick performance by forming highs of ruggedness being in the range of 50-700Angstrom to be at a pitch within a range of 0.1-10mum so as to reduce the friction force. CONSTITUTION:A glass base for magnetic disk is manufactured by forming minute reggedness onto the surface of a glass base and then applying them chemical surface processing thereupon. The shapes of the ruggedness manufacture in this way whose height H is in the range of 50-700Angstrom are at a pitch W of 0.1-10mum in measuring the coarseness by using a probe coarse meter so as to allow a probe whose radium is 2.5mum to scan the surface of the glass. The magnetic film is formed on the glass base processed in this way be means of the process such as sputtering, plating or vapor-deposition, the friction force is reduce to improve the CCS performance and the head stick performance.

8. 发明专利

JPS57161848A MANUFACTURE OF PROJECTION SCREEN MATERIAL 失效
公开(公告)号：JPS57161848A
公开(公告)日：1982-10-05
申请号：JP4639881
申请日：1981-03-31
申请人： ASAHI GLASS CO LTD
发明人： TAMAMURA AKIRA , TAKEHARA MIKIO
IPC分类号： G03B21/60 , G11B17/028 , G11B19/20 , G11B23/00 , G11B25/04
摘要： PURPOSE:To obtain a screen made of synthetic resin which has uniform light scattering characteristics by using a die manufactured by an electroforming method. CONSTITUTION:A pattern which provides desired screen scattering characteristics is transferred to a glass plate and etching is carried out to form prescribed unevenness. This glass plate is used as an original pattern and on its surface, a conductive film is formed by vacuum deposition, sputtering, etc., to obtain conductivity, thereby carrying out electroforming in an electroforming liquid while using the conductive film as a cathode. A metallic film formed on the conductive film by the electroforming method is peeled from the original pattern, and this metallic film is used as a die for press formation to press and transfer its unevenness to a screen basic material of synthetic resin.

9. 发明专利

JP2000199083A DEVICE AND METHOD FOR ETCHING TIN OXIDE FILM 失效
公开(公告)号：JP2000199083A
公开(公告)日：2000-07-18
申请号：JP37426698
申请日：1998-12-28
申请人： ASAHI GLASS CO LTD
发明人： TAKEHARA MIKIO , ADACHI KUNIHIKO
IPC分类号： C25F1/00 , C23F1/08 , C23F1/30 , C23F1/46
摘要： PROBLEM TO BE SOLVED: To uniformly etch a film of tin oxide on a substrate and over an extensive range inside an etching tank by separating an electrolysis reducing tank from the etching tank. SOLUTION: Two functions of an electrolysis reducing tank A to generate or recycle an etching solution, and an etching tank B are separated from each other. The tank A comprises a cathode side liquid chamber 1 to store an acid solution containing metal ion and a cathode 2 arranged in the cathode side liquid chamber, an anode side liquid chamber 3 to store an electrolytic solution and an anode 4 arranged in the anode side liquid chamber, and a separator 5 to separate the anode side liquid chamber 3 from the cathode side liquid chamber 1. The cathode side liquid chamber 1 is provided with a liquid feeding means 5a to continuously or intermittently feed the cathode side liquid from a supply tank C added to smooth the operation of the tank A, the tank B and a whole device, and also a liquid feeding means 5b to directly or indirectly supply the solution reduced in the tank A to the tank B.

10. 发明专利

JPH07188909A VACUUM FILM FORMING DEVICE AND FILM PRODUCED BY THE SAME 失效
公开(公告)号：JPH07188909A
公开(公告)日：1995-07-25
申请号：JP33560293
申请日：1993-12-28
申请人： ASAHI GLASS CO LTD
发明人： TAKEHARA MIKIO
IPC分类号： H05H1/46 , C23C14/32 , H01T23/00
摘要： PURPOSE:To provide a vacuum film forming device which is good in the stability of the current and voltage of a plasma generating source and good in space distribution of plasma, etc., and is, therefore, capable of stably forming films having uniform quality by providing this device with a means for preventing adhesion of film formable materials on an anode electrode. CONSTITUTION:A cover 15 for preventing adhesion of the film formable materials (hereafter described as a deposition preventive plate) on the anode electrode 2 for receiving the charges from the plasma generating source 1 is arranged on the front surface of the anode electrode 2. The shape of this deposition preventive plate is not particularly limited, insofar as the film formable materials made into a particle form hardly fly to the surface of the anode electrode. A more preferable shape of such deposition preventive plate is exemplified by a shape formed by providing the front surface of the deposition preventive plate (inside direction of a vacuum chamber 12) with a proper number of plates (described as fin-like plates) in a horizontal state. Another deposition preventive means of this device includes disposition of a cylinder in front of the anode electrode or arrangement of the rear surface of the anode electrode at a film formable material generating source.

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