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1. 发明专利

JPH0332885A OPTICAL INFORMATION RECORDING MEDIUM 失效
公开(公告)号：JPH0332885A
公开(公告)日：1991-02-13
申请号：JP16923089
申请日：1989-06-29
申请人： KURARAY CO
发明人： KAWATSUKI YOSHIHIRO , MIYAKE NOBUYUKI , ICHIMURA EIJIRO
IPC分类号： B41M5/26 , C09B23/06 , C09B23/08 , G03C1/72 , G11B7/24 , G11B7/244
摘要： PURPOSE:To obtain an optical information recording medium having no regenerative properties by providing a color film containing two specific cyanine colors having an absorptive wavelength peak staying within a specific range at a weight ratio of 100:1 and a reflective film of metal or a dielectric on a substrate. CONSTITUTION:A color film containing a cyanine color having an absorptive wavelength peak staying within a range of 300 to 690nm as shown by formula I and a cyanine color having an absorptive wavelength peak staying within a range of 690 to 850 nm as shown by formula II at a weight ratio of 10:1 to 100:1, and a reflective film of metal or a dielectric are provided on a substrate. In the formulae, R , R are a 1 to 4C alkyl group, R , R , R , R are a hydrogen atom, a halogen atom or a 1 to 10C alkyl group respectively, R is a hydrogen atom, a chlorine atom or a phenyl group, and X , X are an anion selected from among a halogen atom, perchloride, benzene sulfonic acid and toluene sulfonic acid. A hydrogen atom placed at the meso position of a methyl chain may be substituted with a chlorine atom or a phenyl group, and n is 1 or 2.

2. 发明专利

JPS51106171A SEINONOSUGURETA TAKOSHITSUSHIITOZAIRYONO SEIZOHO 失效
公开(公告)号：JPS51106171A
公开(公告)日：1976-09-20
申请号：JP3086175
申请日：1975-03-14
申请人： KURARAY CO
发明人： TSUCHA SHIZUO , ICHIMURA EIJIRO , TANBA YOSHIHIRO
IPC分类号： D06N3/14 , C08J9/28 , D06N3/00

3. 发明专利

JPH04309954A PATTERN FORMING METHOD 失效
公开(公告)号：JPH04309954A
公开(公告)日：1992-11-02
申请号：JP10396091
申请日：1991-04-08
申请人： KURARAY CO
发明人： NAKAMU SHIGEKI , WATANABE MUTSUJI , ICHIMURA EIJIRO
IPC分类号： G03F7/004 , G03F7/027 , G03F7/031 , G03F7/40
摘要： PURPOSE:To obtain a pattern having a surface relief structure by partially irradiating a thin film of a photosensitive resin consisting of a specific polymer and compound with ultraviolet ray, by removing unreacted compound with a specific solvent and by irradiating the full surface with ultraviolet ray. CONSTITUTION:The thin film of the photosensitive resin composition consisting of a polymer A containing 2-100mol% structure unit expressed by the formula I, 0-98mol% structure unit expressed by the formula II and a compound B selected from a group of aromatic aldehyde and aromatic keton is formed. In the formula I, X is hydrogen atom or alkyl group, Y is cycloalkenyl group or the like. And in the formula II, X is hydrogen atom or alkyl group, Y is phenyl group or the like. Next, the thin film is partially irradiated with ultraviolet wave corresponding the the desired pattern and unreacted compound B is removed from the thin film with the solvent which does not dissolve the polymer A. After that, the full surface of the thin film is irradiated with ultraviolet wave. In this way, refractive index of the exposed part becomes higher than that the unexposed part and heat resistant pattern is formed.

4. 发明专利

JPH0416315A MANUFACTURE OF OPTICAL PART 失效
公开(公告)号：JPH0416315A
公开(公告)日：1992-01-21
申请号：JP12087290
申请日：1990-05-09
申请人： KURARAY CO
发明人： NAKAMU SHIGEKI , ICHIMURA EIJIRO
IPC分类号： B29C43/18 , B29C59/00 , B29C59/02 , B29K55/00 , B29L11/00 , B29L17/00
摘要： PURPOSE:To exactly transfer a tongue-and-groove structure formed on a mold and obtain an industrially profitable optical part by a method wherein the mold, which is heated up to the heat distortion temperature of the resin composing resin layer, is pressed against the resin layer, the temperature of which is held below its heat distortion temperature. CONSTITUTION:By pressing a mold 3, which is heated up to the heat distortion temperature of the resin composing resin layer 2, against the surface of the resin layer 2, the temperature of which is held below its heat distortion temperature, the tongued parts of the mold 3 firstly come into contact with the resin layer 2, resulting in dispelling air interposing between the mold 3 and the resin layer 2. Heat is transferred through the resin layer 2 contacting with said heated mold 3, resulting in gradually imbedding the mold 3 in the layer 3. Thus, since no bubble generates between the mold 3 and the resin during forming, the tongue-and-groove structure formed on the mold 3 is exactly transferred to the resin layer 2.

5. 发明专利

JPH0351183A OPTICAL DATA RECORDING MEDIUM 失效
公开(公告)号：JPH0351183A
公开(公告)日：1991-03-05
申请号：JP18771989
申请日：1989-07-19
申请人： KURARAY CO
发明人： KAWATSUKI YOSHIHIRO , MIYAKE NOBUYUKI , ICHIMURA EIJIRO
IPC分类号： B41M5/26 , G11B7/24 , G11B7/244
摘要： PURPOSE:To obtain an optical data recording medium having high reflectivity and good jitter characteristics by mounting a cyanin dye film absorbing laser beam used in order to record data and showing no change in its characteristics even when data is repeatedly reproduced. CONSTITUTION:A dye film containing a cyanin dye represented by formula I and having and absorption wavelength peak within a range of 300 - 690 nm and a cyanin dye represented by formula II and having an absorption wavelength peak within a range of 690 -850 nm in a wt. ratio of 10 : 1 - 100 : 1 is provided on a substrate. Further, a reflecting film having reflectivity of 60 - 100% is provided on the dye film and a protective film having the modulus of elasticity of 1 X 10 - 1 X 10 dyne/cm is provided on the reflecting film. As mentioned above, by mounting the cyanin dye film absorbing laser beam used in order to record data and showing no change in its characteristics even when data is repeatedly reproduced, an optical data recording medium having high reflectivity and good jitter characteristics is obtained.

6. 发明专利

JPH0330988A OPTICAL DATA RECORDING MEDIUM 失效
公开(公告)号：JPH0330988A
公开(公告)日：1991-02-08
申请号：JP16771589
申请日：1989-06-28
申请人： KURARAY CO
发明人： KAWATSUKI YOSHIHIRO , MIYAKE NOBUYUKI , NAKAMU SHIGEKI , ICHIMURA EIJIRO
IPC分类号： B41M5/26 , G03C1/72 , G11B7/24 , G11B7/244
摘要： PURPOSE:To enhance reflectivity and to prevent the change of reproduction characteristics by providing a dye film containing an indolenin type cyanine dye represented by a specific formula and having an absorption wavelength peak within a specific range and a reflecting film composed of a metal or a dielectric to a substrate. CONSTITUTION:A substrate is equipped with a dye film containing an indolenin type cyanine dye I represented by general formula I [wherein R is a 2-6C alkyl group or a group represented by formula II, R is a hydrogen atom or a 1-6C alkyl group, x is an integer of 0-4, y is an integer of 0-5, m is an integer of 1-3 and n is an integer of 0-2] and having an absorption wavelength peak within a range of 630-720nm and a reflecting film composed of a metal or a dielectric. The thickness of the dye film is pref. 30-200nm and that of the reflecting film is pref. 20-100nm and the dye film is formed by dissolving the dye I in an alcoholic solvent and applying the obtained solution to the substrate to form the same into a film.

7. 发明专利

JPH0260976A INK FOR OPTICAL INFORMATION RECORDING MEDIUM 失效
公开(公告)号：JPH0260976A
公开(公告)日：1990-03-01
申请号：JP21446688
申请日：1988-08-29
申请人： PENTEL KK , KURARAY CO
发明人： SAKAI KAZUO , KAWABATA KATSUHIKO , ARISAWA KATSUJI , ICHIMURA EIJIRO , YAMAMOTO YASUHIRO
IPC分类号： C09D11/00 , C09D11/02 , C09D11/033
摘要： PURPOSE:To obtain the title ink which does not impair the recording and reproduction characteristics even when it is used in printing or writing on an information recording surface of an optical information recording medium on or from which information is recorded or reproduced by using laser beams, by using a colorant, a resin and a solvent as essential components and specifying its transmittance. CONSTITUTION:This ink is essentially composed of a colorant (e.g., Varifast Black 1802 or Oil Blue 8B) which has a small absorption at 780nm which is the oscillation wavelength of laser beams of a Ga-As semiconductor, a resin having solvent solubility, film forming properties, an ability to fix writings, etc., which is at least one selected from, for example, natural resins such as rosin and shellac and synthetic and semisynthetic resins such as phenol, ketone, alkyd, amino and cellulosic resins an a solvent (e.g., an 8C or lower primary alcohol) so that the transmittance (wavelength of 780nm) of film formed by uniformly applying it with a bar coater of a wire diameter of 3mm and drying it may be at least 50%.

8. 发明专利

JPH049803A DIFFRACTION GRATING 失效
公开(公告)号：JPH049803A
公开(公告)日：1992-01-14
申请号：JP11199290
申请日：1990-04-27
申请人： KURARAY CO
发明人： NAKAMU SHIGEKI , FUJISAWA KATSUYA , ICHIMURA EIJIRO
IPC分类号： G02B5/18 , G02B27/46
摘要： PURPOSE:To obtain the diffraction grating which has near IR absorptivity and excellent water resistance and moisture resistance and is adequate for use as an optical low-pass filter by forming a grid-like rugged structure on the main surface of a substrate consisting of a resin having the near IR absorptivity. CONSTITUTION:This diffraction grating is constituted by forming the grid-like rugged structure 2 on the main surface of the substrate 1 consisting of the resin having the near IR absorptivity. A transparent resin into which a near IR absorbent is incorporated may be used as the resin having the near IR absorptivity. Heteropolycyclic dyes stuff, such as pentacene derivaties, and anthraquinone dyes stuff, such as 1, 4, 5, 8-tetrachloroanthaquinone, are exemplified as the near IR absorbent. The diffraction grating which has the near IR absorptivity and the excellent water resistance and moisture resistance and is adequate for use as the optical low-pass filter is obtd. in this way.

9. 发明专利

JPH02198893A PREPARATION OF OPTICAL CARD 失效
公开(公告)号：JPH02198893A
公开(公告)日：1990-08-07
申请号：JP1874889
申请日：1989-01-27
申请人： KURARAY CO
发明人： ONO KOJI , ICHIMURA EIJIRO
IPC分类号： B41M5/26 , G11B7/24 , G11B7/243 , G11B7/26
摘要： PURPOSE:To form a recording film with good mass productivity by using a target composed of an alloy consisting of Se and one or more kind of other element to form the recording film on a continuous film according to a sputtering method. CONSTITUTION:An optical card is prepared by using a target composed of an alloy consisting of Se and one or more kind of other element and forming a recording film on a continuous film according to a sputtering method. Or, the recording film is formed on the continuous film according to a DC sputtering method. The m.p. of the target obtained by alloying Se and one or more kind of other element is higher than that of a target composed only of Se and charged electric power at the time of the formation of the recording film can be raised. Therefore, a film forming rate can be enhanced and the taking-up time of the continuous film can be largely shortened. By forming the recording film according to the DC sputtering method, a substrate can be protected from high frequency plasma.

10. 发明专利

JPH02179941A OPTICAL INFORMATION RECORDING MEDIUM AND ITS PRODUCTION 失效
公开(公告)号：JPH02179941A
公开(公告)日：1990-07-12
申请号：JP33544388
申请日：1988-12-29
申请人： KURARAY CO
发明人： ICHIMURA EIJIRO , NAKAMU SHIGEKI
IPC分类号： G11B23/40 , G11B7/24 , G11B7/26
摘要： PURPOSE:To enable visual check of a specified pattern on the surface of a recording medium without causing any influence of the formed pattern on recording/reproducing characteristics by making difference in intensity or color of reflected or diffracted light in the area corresponding to the pattern from other area. CONSTITUTION:If the fine signal patterns 5 in a macroscopic area 7 corresponding to the prescribed pattern 2 are made different in either shape or size from other signal patterns, diffraction effect in the area 7 differs from that in the other area to give different intensity or color of reflected or diffracted light from light in other area. If a photosensitive resin is provided on this substrate ad exposed to light, first to form uneven surface state and second to form the specified pattern, the projections or recessions in the pattern area differ from those in other area in shape or size. By this method, the obtd. optical information recording medium can have patterns of letters or images which can be visually checked without causing any trouble on recording/reproducing by an optical head.

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