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1. 发明专利

JPH09274188A OPTICAL MODULATION ELEMENT AND OPTICAL HEAD DEVICE 失效
公开(公告)号：JPH09274188A
公开(公告)日：1997-10-21
申请号：JP8280196
申请日：1996-04-04
申请人： ASAHI GLASS CO LTD
发明人： TAKIGAWA TOMOYA , TANABE YUZURU
IPC分类号： G02F1/1337 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To enhance the utilization efficiency of light and to prevent the degradation in orientation characteristics by rubbing the oriented films on the surfaces of the grating-like rugged parts on transparent substrates in the stripe direction of gratings. SOLUTION: The SiON film on the surface of the first glass substrate 1 is etched, by which the grid-shaped rugged parts 2 having a rectangular section are formed. A polyimide film 4 is formed by a spin coating method on the surface of the second glass substrate 3 and is subjected to a rubbing treatment for the purpose of orientation. On the other hand, a polyimide film 5 is similarly formed on the surface of the glass substrate 1 formed with the rugged parts 2 and is subjected to the rubbing treatment in the direction parallel with the strip direction of the rugged parts 2 in such a manner that the rubbing direction of the polyimide film 5 and the stripe direction of the rugged parts 2 are made the same. The glass substrates 1, 3 are disposed to face each other and the circumferences of the respective glass substrates 1, 3 are sealed with an epoxy resin 6. Liquid crystals 7 are vacuum injected between the substrates from a liquid crystal injection port to form the optically anisotropic diffraction gratings. Further, a λ/4 film 8, a photopolymer and a third substrate 9 are laminated and adhered to the glass substrate 3, by which the optical modulation element is obtd.

2. 发明专利

JPH09167376A OPTICAL HEAD DEVICE 失效
公开(公告)号：JPH09167376A
公开(公告)日：1997-06-24
申请号：JP33040495
申请日：1995-12-19
申请人： ASAHI GLASS CO LTD
发明人： TANABE YUZURU , TAKIGAWA TOMOYA
IPC分类号： G02B5/18 , G03H1/00 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To inexpensively obtain an optical head device having a high light utilization efficiency with a simple constitution. SOLUTION: Grid-like rugged parts 2 of a rectangular shape having 1.2μm depth and 10μm pitch (period) are formed on a first glass substrate 1. A phase difference sheet (λ/4 sheet) 5 made of polycarbonate is adhered with a transparent tacky adhesive onto one surface of a second glass substrate 4. A silica thin film 6 having 0.03μm thickness is previously formed by a sputtering method on the surface of liquid crystal 3 side of the phase difference sheet 5.

3. 发明专利

JPH09167372A MANUFACTURE OF OPTICAL HEAD DEVICE AND DEVICE THEREFOR 失效
公开(公告)号：JPH09167372A
公开(公告)日：1997-06-24
申请号：JP32561995
申请日：1995-12-14
申请人： ASAHI GLASS CO LTD
发明人： TANABE YUZURU , TAKIGAWA TOMOYA , MURATA KOICHI , AIZAWA YUJI
IPC分类号： G11B7/135
摘要： PROBLEM TO BE SOLVED: To perform highly accurate and high quality recording/reproduction with a high optical efficiency by irradiating an exposure diffraction grating member having a plurality of diffraction grating regions with a parallel light and subjecting this to interference and exposure in the substrate of a photosensitive member so as to form a volume hologram. SOLUTION: Grating regions A and B composed of surface recessed/projected type diffraction gratings 4A and 4B are formed on the upper surface of the upper layer cover glass 2 of an exposure diffraction grating member. Each of the diffraction gratings 4A and 4B has a grating pattern decided based on a phase transformation function different from each other. Of parallel lights made incident from the upper part, a light reaching the grating region A and a light reaching the grating region B are diffracted at specified rates, made incident on the substrate 1 of a photosensitive member as respective collecting magnetic fluxes, interference fringes are formed in the substrate 1, and thereby, a volume hologram is formed. A shutting-off mask 5 is provided between the grating regions A and B, a middle shutting-off mask 3 is inserted and thus an optical head having a high optical efficiency is manufactured.

4. 发明专利

JPH04251437A PRODUCTION OF SUBSTRATE FOR MAGNETIC DISK 失效
公开(公告)号：JPH04251437A
公开(公告)日：1992-09-07
申请号：JP14955191
申请日：1991-05-24
申请人： ASAHI GLASS CO LTD
发明人： TAKIGAWA TOMOYA , KIJIMA SHUN , MURAMOTO SHIGERU , TASHIRO AKIHIKO
IPC分类号： C03C15/00 , G11B5/84
摘要： PURPOSE:To improve the glass substrate for magnetic disks, particularly CSS characteristics and static friction characteristics by forming the ruggedness of the substrate for magnetic disks consisting of glass formed with the microruggedness on the surface in such a manner that the max. height of the ruggedness is within the range of prescribed values and the ruggedness is formed at pitches of a prescribed range. CONSTITUTION:The glass blank plates are subjected to prescribed rough lapping and polishing, then to washing and drying on both surfaces. Such glass blank plates are fixed at the center to a revolving shaft 39 to form a disk-shaped glass assembly 30. After an upper part 35 of an etching tank is removed, the assembly 30 is mounted to a motor 32 and the upper part 35 is mounted again. The upper part 35 and lower part 36, and gaseous mixture supply pipings 33 and pipings are controlled to a prescribed temp. and gaseous nitrogen is discharged from a gaseous mixture discharge pipe 34. While the assembly 30 is kept rotated, the assembly is rested for a prescribed period of time. The gaseous mixture is thereafter discharged from the discharge pipe 34 for a prescribed period of time to execute etching. The ruggedness having the surface roughness suitable for the magnetic disk substrates is obtd. in this way.

5. 发明专利

JPS63190171A IMPROVED NOZZLE FOR INTRODUCING GAS FOR CVD 失效
公开(公告)号：JPS63190171A
公开(公告)日：1988-08-05
申请号：JP2168387
申请日：1987-02-03
申请人： ASAHI GLASS CO LTD
发明人： KOBAYASHI SHIGEYOSHI , HACHIUMA SUSUMU , TAKIGAWA TOMOYA
IPC分类号： C23C16/44 , C23C16/453 , C23C16/455
摘要： PURPOSE:To uniformize flow velocity and flow rate in the width direction of gas and to stably form a thin film having uniform film thickness by constituting a nozzle for introducing gas in a CVD device wherein one or two and more kinds of gaseous raw materials are introduced and the thin film is formed on a substrate, so that it consists of a specified structure. CONSTITUTION:In case of feeding a plurality of gasses A, B, C for forming a thin film on a substrate in a CVD device, the flow path of gas C is formed by plates 1, 5 and the flow path of gas B is formed by plates 2, 4 and the flow path of gas A is formed by a plate 3. Respective plates have 0.2-20mm thickness respectively and are constituted of a groove 7 which is long in the width direction for forming gas flow path and has 0.1-100mm width, >0.1mm depth and 0.1-150mm length, a plurality of slender grooves 8 whose ends are connected with the groove 7, a groove 9 wherein a flow path connected to the grooves 8 is enlarged and made confluent and a groove 10 for discharging gas. The groove 9 has =0.1mm depth and >=500 enlargement ratio of the flow path area and the length to the outlet of the groove 10 from the gas confluent end is regulated to >=100mm.

6. 发明专利

JPH11322367A GLASS SUBSTRATE FOR FLAT PANEL DISPLAY AND ITS PRODUCTION 失效
公开(公告)号：JPH11322367A
公开(公告)日：1999-11-24
申请号：JP13240598
申请日：1998-05-14
申请人： ASAHI GLASS CO LTD
发明人： KANEKO MASAMI , TAKIGAWA TOMOYA
IPC分类号： C03C15/00 , C03C17/30 , G09F9/30
摘要： PROBLEM TO BE SOLVED: To obtain a high strength glass substrate without requiring chemical strengthening by coating the end face of a glass substrate from which flaws, which influence on mechanical strength is removed by etching treatment, with a protective film comprising a silica layer of cured material of a coating composition containing polysilazane and having a specific hardness. SOLUTION: A glass raw plate having a composition corresponding to uses is cut into a prescribed size and the end face is subjected to beveling and fish processing with grinding stone, etc. and as necessary, main surface is polished to improve the flatness. The end face of the glass substrate is subjected to etching treatment with fluorosulfuric acid, etc., so as to remove >=15 μm deep injury which exist on the end face controlling flexural strength as much as possible. A protective film having a hardness of >=5 H scratch value of pencil is applied onto the end face of the substrate subjected to etching treatment. A silica layer which is the cured product of a coating composition containing polysilazane is preferable as the protective film. The protective film is formed by applying the coating composition to the end face and heat-curing the composition. The protective film attached to main surface is preferably polished and removed.

7. 发明专利

JPH09269287A SLURRY SPECIFIC GRAVITY MEASURING METHOD AND SLURRY SPECIFIC GRAVITY MEASURING DEVICE 失效
公开(公告)号：JPH09269287A
公开(公告)日：1997-10-14
申请号：JP8026796
申请日：1996-04-02
申请人： ASAHI GLASS CO LTD
发明人： TAKIGAWA TOMOYA
IPC分类号： G01G17/04 , G01N9/02
摘要： PROBLEM TO BE SOLVED: To measure the specific gravity of slurry easily and correctly and dispense with maintenance by feeding slurry at always constant specific flow velocity to a specific gravity measuring container of round pipe shape, provided separately from a slurry tank, to detect weight. SOLUTION: A mixer 3 for agitating slurry 2 is fitted to a slurry tank 1 for storing the slurry 2 to be fed between a polished glass article and a polishing tool. The slurry 2 is fed from the tank 1 to a specific gravity measuring container 7 by a pump 4 and returned to the tank 1 via an outflow pipe 8 and an outflow hose 9. An inflow port (outflow port) is formed into gently enlarged (narrowed) cross-sectional area shape so as not to generate complex flow such as separating bubbles when the slurry 2 flows in or flows out of the container 7, and the relation between the flow velocity V1 in the container 7 and the average settling velocity V2 of abrasive grains in the container 7 is made V1

8. 发明专利

JPH08262417A LIQUID CRYSTAL DISPLAY DEVICE AND ITS PRODUCTION 失效
公开(公告)号：JPH08262417A
公开(公告)日：1996-10-11
申请号：JP6806995
申请日：1995-03-27
申请人： ASAHI GLASS CO LTD
发明人： TAKIGAWA TOMOYA , SUGAWARA TSUNEHIKO
IPC分类号： G02F1/1333 , G02F1/133
摘要： PURPOSE: To substantially prevent the occurrence of disturbance in polarized light and to prevent the degradation in the contrast ratio of display by forming transparent films on the bases of the plasma discharge spaces of a substrate and smoothing the surfaces thereof to the max. surface roughness of a specific value or above. CONSTITUTION: The peripheries of substrates 1, 4 holding a liquid crystal layer 3 are sealed by a sealing material 10. The plasma discharge spaces 6 are formed of the second substrate 4 and a third substrate 7. The second substrate 4 and a third substrate 7 are joined at least at the peripheral parts. The third substrate 7 is formed with many slender grooves as the plasma discharge spaces 6 and the bases of these grooves have a considerable number of pieces of ruggedness. The scattering of the light transmitted through the polarizing plate 12 is resulted in this state. The transparent films are, therefore, formed on such roughened bases and are smoothed to the max. surface roughness of

9. 发明专利

JPH0729518A CATHODE-RAY TUBE 失效
公开(公告)号：JPH0729518A
公开(公告)日：1995-01-31
申请号：JP19900293
申请日：1993-07-16
申请人： ASAHI GLASS CO LTD
发明人： TAKIGAWA TOMOYA
IPC分类号： H01J29/89 , H01J29/87 , H01J29/88
摘要： PURPOSE:To remove the distortion of a face surface of a CRT by bonding an elastically deformed glass thin plate to an outside surface of a panel face by ultraviolet-curing resin without carrying out surface polishing. CONSTITUTION:A glass thin plate 1 is sandwiched between a pressure reducing fixing tool 4 having a cylinder surface shape equal to a panel face surface of a CRT and a mold 6. The mold 6 is pushed down, and the thin plate 1 is made to follow the cylinder surface shape. After pressure is reduced and the thin plate is fixed to the fixing tool 4, the mold 6 is removed. Since highly accurate bending work can be carried out without prepreparation, an undistorted excellent face surface can be obtained.

10. 发明专利

JPS63240917A GAS SEPARATION MEMBRANE 失效
公开(公告)号：JPS63240917A
公开(公告)日：1988-10-06
申请号：JP7177587
申请日：1987-03-27
申请人： ASAHI GLASS CO LTD
发明人： KO HIDEMASA , TAKIGAWA TOMOYA , SUGIYAMA TOKUHIDE
IPC分类号： B01D53/22
摘要： PURPOSE:To obtain gas separation membrane having a separation factor balancing with permeation velocity for O2, having also stable durability of the characteristic of the membrane by using a copolymer consisting of tetrafluoroethylene and a specified vinylether contg. siloxane. CONSTITUTION:Gas separating membrane is obtd. by superposing thin film of a copolymer consisting of tetrafluoroethylene and a specified vinylether contg. siloxane expressed by formula I on porous polysulfone film. Suitable proportion of each comonomer to be contained in the above described copolymer is generally, about 5-70mol.% tetrafluoroethylene, and about 60-5mol.% specified vinylether contg. siloxane. By copolymerizing, if necessary, a specified third component such as alpha-olefin, or more components therewith, characteristics of the membrane, such as crosslinking characteristics, adhesivity to a base film, may be imparted to the product.

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