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1. 发明专利

JPH10314598A ANTIFOULING METHOD USING PHOTOCATALYST, ANTIFOULING FILM AND ANTIFOULING PRODUCT 失效
公开(公告)号：JPH10314598A
公开(公告)日：1998-12-02
申请号：JP12989197
申请日：1997-05-20
申请人： HITACHI LTD , NITTO DENKO CORP
发明人： ISHIKAWA TAKAO , KAMOTO DAIGORO , OISHI TOMOJI , TAKAHASHI KEN , DOMOTO TADANORI , SHIBATA KAZUNARI
IPC分类号： B01D53/86 , B01J35/02 , B32B9/00 , C09K3/00 , C09K3/16
摘要： PROBLEM TO BE SOLVED: To catalyze the decomposition of organic matters and prevent the adhesion of foreign matters by using a conductive body and making the surface resistance of a photocatalyst film less than specified value. SOLUTION: A glass plate 5 with an anti-static photocatalyst film formed of a base 1 and a conductive photocatalyst film 4 laminated together is manufactured (b). A continuous phase 3 composed of TiO2 as a photocatalyst and conductive fine particles 2 dispersed in the continuous phase 3 are provided (a). In the manufacturing method for the glass plate 5, a coating liquid prepared by ITO-fine particle dispersed into titania sol is dried and heated after forming a film of one of the surface and the back of the glass base 1. When the surface resistance value and an anti-static photocatalyst film 4 of non-conductive film thus formed and the foul of the film after the film is left in a smoking room for one month are checked and the surface resistance value is 10 Ω/square or less, the anti-static preventing function is effective for preventing the adhesion of dust.

2. 发明专利

JPH10138385A PLASTIC FILM WITH OXIDE THIN-FILM AND ITS MANUFACTURE 失效
公开(公告)号：JPH10138385A
公开(公告)日：1998-05-26
申请号：JP30032396
申请日：1996-11-12
申请人： HITACHI LTD , NITTO DENKO CORP
发明人： ISHIKAWA TAKAO , KAMOTO DAIGORO , OISHI TOMOJI , TAKAHASHI KEN , NAGAI YOZO , KOUCHI KOJI
IPC分类号： B32B9/00 , B32B15/04 , H01B5/14 , H01G4/20
摘要： PROBLEM TO BE SOLVED: To provide a plastic film having an oxide thin film for effectively reducing a production cost by easily forming the thin film having a high strength at a low temperature on the plastic film. SOLUTION: When an ultraviolet ray is emitted, the ray can be reflected by an Ag film 3, and a PET film 1 can be protected. Further, the ray reflected by the film 3 is again emitted to an oxide thin film 2 to improve a ray emitting efficiency, and the thin film can be sufficiently sintered. As a result, a large- scale apparatus like a vacuum apparatus is not only eliminated as compared with first prior art, but also the film 2 can be rigidly formed even at a low temperature as compared with second prior art. Further, there is no fear of damaging the PET film as compared with third prior art.

3. 发明专利

JP2001354444A GLASS SUBSTRATE FOR INFORMATION RECORDING DISK 失效
公开(公告)号：JP2001354444A
公开(公告)日：2001-12-25
申请号：JP2001116301
申请日：2001-04-16
申请人： HITACHI LTD
发明人： YAMAMOTO HIROTAKA , NAITO TAKASHI , NAMEKAWA TAKASHI , TAKAHASHI KEN , WATANABE MASAHIRO , TAKEO NORIYUKI
IPC分类号： C03C3/095 , G11B5/73 , G11B5/733 , G11B7/24 , G11B7/253 , G11B11/105
摘要： PROBLEM TO BE SOLVED: To provide a glass substrate for an information recording disk having high mechanical characteristics and excellent in chemical stability, thermal stability, smoothness and transparency. SOLUTION: The glass substrate comprises glass containing at least one rare earth element selected from the group consisting of Sc, Y, La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. A layer for recording information is disposed on at least a part of the surface of the glass substrate.

4. 发明专利

JP2000223302A CERAMICS RESISTOR AND ITS MANUFACTURE 失效
公开(公告)号：JP2000223302A
公开(公告)日：2000-08-11
申请号：JP2169899
申请日：1999-01-29
申请人： HITACHI LTD
发明人： KANAI TSUNEYUKI , CHIBA AKIO , SAITO YUKIO , TAKAHASHI KEN
IPC分类号： H01C7/00
摘要： PROBLEM TO BE SOLVED: To restrain resistivity at normal temperature and improve stability of characteristics, reliability and reproducibility by dispersing a specified amount in Si3N4 as free carbon of deposited SiC. SOLUTION: The mixing ratio of C powder to Si3N4 powder is set in the range of at least 1 wt.% and less than 15 wt.%. In order to reduce the temperature dependence of free carbon, free carbon amount is set to be at least 100 PPM and less than 10,000 PPM. Proper amount of dispersant is added to those powders. They are sulbjicted to thermal treatment in inert gas at 1,500-1,800 deg.C is performed, material powder is decomposed and/or composed by chemical reaction, and SiC particles and/or SiC whiskers are formed in Si3N4 matrix. SiC particles, SiC whiskers and free carbon can be formed uniformly and finely and decomposed in Si3N4. As a result, free carbon as a material with which SiC restrains resistivity can be decreased in temperature dependence of a resistor.

5. 发明专利

JP2000207724A MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING DEVICE USING THE SAME 失效
公开(公告)号：JP2000207724A
公开(公告)日：2000-07-28
申请号：JP607199
申请日：1999-01-13
申请人： HITACHI LTD
发明人： KIRINO FUMIYOSHI , INABA NOBUYUKI , YAMAMOTO HIROTAKA , NAITO TAKASHI , TAKAHASHI KEN , TERAO MOTOYASU , HOSAKA SUMIO , KOYAMA EIJI , KURAMOTO HIROKI
IPC分类号： G11B5/66 , G11B5/65 , G11B5/73 , G11B5/738 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To provide a magnetic disk medium for realizing reduction in noise, thermal fluctuation and thermal demagnetization, and to provide a magnetic recording device for realizing ultrahigh density magnetic recording which exceeds 10 GB/inch2 as a result. SOLUTION: An inorganic compound thin film 2 obtained by dissolving one kind of oxide (solute) selected from among cobalt oxide, iron oxide, or nickel oxide in at least one kind of oxide (solvent) selected from among silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, or zinc oxide is formed on the surface of a glass substrate 1, and then a magnetic recording medium is formed. In the inorganic thin film 2, the solute substances are deposited as crystal particles, and the solvent substances are allowed to exist in the crystal boundary.

6. 发明专利

JP2000111705A DISPLAY DEVICE 失效
公开(公告)号：JP2000111705A
公开(公告)日：2000-04-21
申请号：JP28500198
申请日：1998-10-07
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： ISHIKAWA TAKAO , KAMOTO DAIGORO , OISHI TOMOJI , TAKAHASHI KEN , UCHIYAMA NORIKAZU , MIURA SEIJI , NISHIZAWA SHOKO , TOJO TOSHIO
IPC分类号： G02B1/11 , G02B1/116 , H01J29/88 , H01J29/89
摘要： PROBLEM TO BE SOLVED: To provide a display device which is provided with a surface treated film with low reflection, low resistance, and wavelength selective absorption effect by forming a surface treated film in which luminous transmittance and luminous reflectivity is respectively a specific rate or less, and the absolute value of the differential value of a reflectivity curve is a specific value or less, and the reflectivity curve is made flat. SOLUTION: This display device is provided with a surface treated film in which luminous transmittance is 85% or less, luminous reflectivity is 2% or less, the absolute value of the differential value of a reflectivity curve is 2 or less, and the reflectivity curve is made flat. For example, a high precise cathode ray tube 1 is provided with an envelope 2 made of glass, and the envelope 2 is provided with a neck 3 and a face plate 5 sealed by flit glass continuing from the neck 3. A fluorescent screen is provided on the inner face of the face plate 5. Then, a reflective charge preventing film 12 with a waveform selective absorption effect being this surface treated film is provided on the outer surface of the face plate 5 of the cathode ray tube 1.

7. 发明专利

JP2000011455A OPTICAL INFORMATION RECORDING MEDIUM 失效
公开(公告)号：JP2000011455A
公开(公告)日：2000-01-14
申请号：JP18189498
申请日：1998-06-29
申请人： HITACHI LTD
发明人： YAMAMOTO HIROTAKA , NAITO TAKASHI , NAMEKAWA TAKASHI , IMANISHI YASUO , TERAO MOTOYASU , SHINTANI TOSHIMICHI , TAKAHASHI KEN
IPC分类号： B82B1/00 , G11B7/09 , G11B7/125 , G11B7/243 , G11B7/257 , G11B7/24
摘要： PROBLEM TO BE SOLVED: To assure repetitive recording and reproducing operation for a long period and to enable high productivity and super-high resolution effect by providing the record medium with a super-high resolution film of an inorg. compd. composed of plural phases capable of changing the reflectivity and intensity distribution of reflected light dependently upon the intensity of incident light. SOLUTION: The super-high resolution film 2 of a desired film thickness is formed by sputtering on a substrate 1 and an SiO2 protective film 5 is formed thereon, following which a reflection film 4 is further formed thereon. A super- high resolution effect is not obtainable if the super-high resolution film 2 is a single phase film. If the super-high resolution film is formed by specifying a CoO content to 60 to 95 wt.% without depending on the kinds of the matrix, an output level may be raised up to a high-frequency component and the super- high resolution effect may be obtd. Output deterioration is lessened in spite of repetitive reproducing or recording and reproducing. The high-frequency components of signals are plotted in dense bit patterns on a ROM disk and, therefore, the reproduction output by reading down to the fine pit patterns is made possible by the formation of the super-high resolution film 2.

8. 发明专利

JPH10314600A OXIDE PHOTOCATALYST FILM AND PRODUCT PROVIDED WITH THE SAME 失效
公开(公告)号：JPH10314600A
公开(公告)日：1998-12-02
申请号：JP12929997
申请日：1997-05-20
申请人： HITACHI LTD
发明人： ISHIKAWA TAKAO , KAMOTO DAIGORO , OISHI TOMOJI , TAKAHASHI KEN
IPC分类号： B01J21/06 , A01N25/00 , B01J23/02 , B01J23/06 , B01J23/14 , B01J23/18 , B01J23/26 , B01J23/38 , B01J23/74 , B01J33/00 , B01J35/02
摘要： PROBLEM TO BE SOLVED: To obtain a photocatalyst film of titanium oxide particle dispersion type exhibiting photocatalyst activities to be durable for practical use by slight light quantity even when the crystallizability of titanium oxide is low and also provided a product having the film by incorporating a specific metal element in an inorganic film of an oxide photocatalyst film. SOLUTION: Ions of valence of 2 or less of an element having the electronegativity smaller than 1.6 and the ion radius of less than 0.2 nm are added on a oxide photocatalyst film in which TiO2 fine particles are dispersed in an inorganic film. For the purpose of forming the oxide photocatalyst film, first a solution formed by dispersing TiO2 in SiO2 sol is prepared, and a PET film 1 is formed by using the solution. Then the PET film 1 is coated with TiO2 dispersed SiO2 , and the treatment is carried out while emitting a low pressure mercury lamp to form a plastic film coated with a TiO2 dispersed SiO2 film 4 with TiO2 fine particles 3 dispersed in an SiO2 film 2.

9. 发明专利

JPH10214584A ELECTRIC CHARACTERISTIC ANALYZER 失效
公开(公告)号：JPH10214584A
公开(公告)日：1998-08-11
申请号：JP1818497
申请日：1997-01-31
申请人： HITACHI LTD
发明人： TANAKA SHIGERU , TAKAHASHI KEN , YAMADA SEIICHI , SHOJI MORITAKA
IPC分类号： G01N23/22 , H01J37/20 , H01J37/244 , H01J37/28
摘要： PROBLEM TO BE SOLVED: To specify an arbitrary position of a sample and achieve measurement of electric characteristics of the sample at the arbitrary position without any sample machining by using a sample stage provided with at least two metallic micro probes, which can be moved at a predetermined pitch in X-, Y- and Z-directions, and a scanning electron microscope capable of confirming the surface of the sample and the tip of the micro probe. SOLUTION: Micro probes 2 and a sample holder fixed to various lead wires are placed on a sample stage 4 of a scanning electron microscope(SEM). A ceramics sample having an appropriate size is stuck to the sample holder, and then, the micro probes 2 are visually moved near the surface of the sample. Thereafter, the SEM is vacuum-exhausted, thus generating an electron beam. In work for confirming the sample and the tip of the micro probe 2, PZT ceramic 3 (driving element of the micro probe) is driven to finely adjust the micro probe 2 in an arbitrary position after determination of an observed region. Consequently, it is possible to grasp electric properties of the arbitrary fine region in the sample.

10. 发明专利

JPH1036168A PRODUCTION OF CERAMIC LINEAR RESISTOR 失效
公开(公告)号：JPH1036168A
公开(公告)日：1998-02-10
申请号：JP19457496
申请日：1996-07-24
申请人： HITACHI LTD , JAPAN RES DEV CORP
发明人： MOTOWAKI NARIHISA , TAKAHASHI KEN , TANAKA SHIGERU , MAEDA KUNIHIRO
IPC分类号： C04B35/453 , H01C7/10
摘要： PROBLEM TO BE SOLVED: To obtain a ceramic linear resistor aiming at a highly withstanding property by blending specific four components and burning the mixture, and a breaker stably functioning up to a high temperature by using the highly withstanding ceramic linear resistor. SOLUTION: This ceramic linear resistor is obtained by blending 68-90mol% Zn based on ZnO, 5-20mol% Al based on Al2 O3 , 3-10mol% Mg based on MgO and >=1mol% at least one of ZnAl2 O4 and MgAl2 O4 , and sintering the mixture. A resistor element 1 obtained by inserting an insulating rod 2 into an insulating tube 3, is housed in a resistor unit 4 of a breaker shown in the figure, and a bushing 10 for protecting an electric circuit is installed therein. By air from an air tank 9, a piston 7 for opening and closing operations is actuated, main contact points 6a, 6b for turning on electricity are opened for applying the electricity to the resistor unit 4 connected in parallel, and rear resisting contact points 5a, 5b are opened to complete a breaking function. A turning on function is to close the resistor contacting points 5a, 5b by the piston 7 for the opening and closing operations, turn on the electricity to the resistor unit 4 and close the main contacting points 6a, 6b.

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