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Patent Searching and Data


Matches 201 - 250 out of 1,205

Document Document Title
JP2004039136A
To provide a stamper which can inexpensively and easily be manufactured and which can satisfactorily be peeled from a light-hardened resin layer and a manufacturing method of an optical multilayer recording medium with satisfactory produ...  
JP2004005872A
To solve the problem wherein if a PEB (post-exposure bake) conditions are set to improve pit edge shape, slippage is generated in the shape of a long and short pit, from the difference in the amount of spreads of acid generated in a expo...  
JP3477446B2
A dual-layer DVD disc that does not require a stamping step (typically as part of the 2P prior art manufacturing process) during its manufacture. A polycarbonate substrate (64) is molded and coated with a semireflective data layer (66), ...  
JP3469713B2
To easily manufacture an optical disk medium with less warping and birefringence by positioning two substrates coated with adhesive on recording surface sides oppositely to each other and applying compression force in the radial directio...  
JP2003323748A
To provide a mother stamper and its manufacturing method for an ultra-resolution optical disk which can improve the surface roughness of the mother die and advanced light exposure on the photoresist of the die.This method has a step to p...  
JP2003281791A
To enhance uniformity of the thickness of an intermediate layer provided between two recording layers in a single-sided two layered optical disk for the next generation.A stamper is spin-coated with a 2P resin (Photo-Polymer) (ST1) and a...  
JP2003228892A
To exactly and stably position and hold a disk-like base material having no central hole for a disk-like optical recording medium in subjecting the disk-like base material to spin coating.A circular recessed part 16 is formed at the cent...  
JP2003524273A
(57) in order to provide a summary optical type with the easy and cheap method for coating the data carrier which can be read, The method and equipment for coating optically the data carrier which can be read which were -ed made to 着 o...  
JP2003217194A
To provide a method of manufacturing an optical disk including spincoating a substrate with a resin to form a light transmission layer without an additional cover.The method of manufacturing the optical disk comprises: a step (a) of prep...  
JP2003520381A
Production of a substrate comprises: continuously coating a plastic film strip with a liquid ultraviolet-hardenable material in a specified layer thickness; drying the coating of the strip using heat; and coiling the coated strip for fur...  
JP2003168250A
To provide a simple production method for a multi-layer information record carrier by which the manufacturing time is shortened and creation of automation equipment for mass production is facilitated.The production method involves formin...  
JP2003145586A
To provide an apparatus and a method for combining a high quality product of a single-cavity mold with a high performance product of a multi- cavity mold without requiring the replacement of the existing stock of the single-cavity mold.S...  
JP3401795B2
PURPOSE: To moderate mechanical precision required for a mold and mold a disk base with a high precision by a method wherein resin is injected into a cavity of the disk base mold, a columnar movable member is inserted thereafter to the m...  
JP2003123331A
To form a spacer layer without making eccentric each of recording layers.In the production method for the multilayer optical recording medium having two recording layers laminated on both the sides of the spacer layer on a substrate D1, ...  
JP2003091887A
To form a spacer layer of a uniform layer thickness while preventing the intrusion of air bubbles therein without entailing a steep rise of a manufacturing cost.The method of manufacturing the multilayered optical recording medium by for...  
JP2003067992A
To provide an optical disk manufacturing method which can secure a high-density recording capacity by easily cutting off the bumps formed on the edges of a disk when manufacturing a transmission layer by the spin coat method.This optical...  
JP2003067984A
To make manufacturing of a one-side two-layer optical disk easy by depositing a thin translucent metal film on an injection molded stamper and curing the 2P resin by irradiating ultraviolet rays through it.This is a manufacture method of...  
JP2003059124A
To perform deposition and formation of a light transmissible layer on a disk-like substrate without forming a central hole. This method of manufacturing optical disk includes a process step of injecting a synthetic resin into a gate from...  
JP2003502783A
The invention relates to a simple and economical method for coating an optically readable data carrier, whereby a method and a device for coating said data carrier are disclosed. According to said method, a transparent adhesive film, is ...  
JP2003006948A
To provide a method for manufacturing an optical information recording medium by which a dyestuff recording layer provided with non-recording region at the peripheral edge part by removing the dyestuff recording layer can efficiently be ...  
JP2003001681A
To provide a unit for releasing a disc substrate capable of preventing the generation of cracks, warpage, pit deformation and the like from occurring during releasing the disc substrate and making the proceeding of a disc manufacturing s...  
JP3359725B2  
JP2002361692A
To provide a disc molding apparatus which can contract a movable side housing, which can prevent occurrence of an eccentricity, a scuff or a contaminant and further which can easily and efficiently generate an ultra-thin disc board, and ...  
JP2002337152A
To provide a mold constituted so as to be brought into contact with the substrate of a heated recording medium under pressure to form a data pattern including servo data or address data to the substrate, capable of forming the precise da...  
JP2002288892A
To provide an inerasable water mark on a recorded medium to prove and confirm that it is the genuine one.An optically readable information recorded medium is manufactured by forming a mark on the back of the production stamper by laser e...  
JP2002530632A
According to the inventive method for determining the thickness of at least one layer provided on a substrate, the measurement can be constructed simply and reliably and a reliable measuring result can be obtained by measuring reflection...  
JP2002240101A
To obtain a disk board having no flash at an edge of a center hole.The disk board 23 comprises a straight part 24a and a tapered part 24b formed at a center hole 24, and a round surface or a C-shaped surface 24c formed at an edge of a si...  
JP2002526294A
The invention relates to a shaping tool for the injection molding or injection compression of information carrier disc blanks (11) made of polymethacrylate plastic which is suited as a component of an injection molding or injection compr...  
JP2002521228A
(57) Mold assembly for forming a duplicated disk by a summary disk forming step. A duplicated disk includes the surface formatted to both sides. A mold assembly contains the disk board cavity demarcated by the 1st block (26) that has the...  
JP2002192587A
To provide a mold unit for molding an optical disk capable of making a mold temperature around a product cavity uniform so as to enable improving of a dimensional accuracy of the disk.The mold unit for molding the optical disk comprises ...  
JP2002517877A
In a method of manufacturing a matrix for making optical storage media a plate-shaped matrix body is formed. Then a resist coating is applied on one side of the body by spinning a polymer over the body starting from a central portion of ...  
JP2002170279A
To provide an optical recording medium by which stripping is prevented when a light transmissive layer is formed, flatness of a cramp reference surface is improved to restrict face-runout when the optical recording medium is placed on th...  
JP2002514339A
A disc molding apparatus for forming an optical disc. The apparatus has a disc substrate cavity and a sprue mechanism in fluid communication with the cavity. A removable stamper located on one side of the disc substrate cavity forms data...  
JP3275091B2
To improve the adhesiveness of a carbon coat, mold life, etc., by subjecting the forming surface of a press forming mold made of a sintered hard material to ion implantation to modify the surface layer of the forming surface before subje...  
JP2002510835A
A method of making a stamper for use in a data storage disk molding process. The method includes making a first stamper including the steps of providing a stamper body having an information layer thereon. The information layer is covered...  
JP2002507043A
Processes for producing the multi-layered optical recording medium shown in FIG. 2 using the embossing master (20) shown in FIG. 3, where an etched metal thin layer (22) has been electroplated with a thick metal layer and the luminescent...  
JP3260956B2
PURPOSE: To obtain a disk molded piece having excellent optical characteristics that double refraction index at each part is equal, by cooling a periphery of a sprue and a tip of a male cutter during a period from about a time when an in...  
JP3261107B2
To prevent the lowering of the characteristics of a molded product caused by the deformation thereof. An injection mold has a sprue bush 24, a fixed member, a fixed disc plate 16, the punching member arranged in opposed relation to the s...  
JP2002504256A
The invention relates to a process for preparing molded discs suitable for use in optical information recording carriers and to the optical information recording carriers thereby obtainable.The process comprises plasticating a homopolyme...  
JP3241983B2
To facilitate removal of a stamper plate by generating no attracting force between a parmanent magnet of a disc cavity plate on the fixed side and a cavity ring when the cavity ring is at the second angular position and generating an att...  
JP2001344827A
To provide a manufacturing method for an optical disk by which the high-quality optical disk can efficiently be manufactured by an integrated production line, and to improve productive efficiency in an injection molding process.In the ma...  
JP2001522503A
PCT No. PCT/EP97/06985 Sec. 371 Date Aug. 11, 1999 Sec. 102(e) Date Aug. 11, 1999 PCT Filed Dec. 12, 1997 PCT Pub. No. WO98/27551 PCT Pub. Date Jun. 25, 1998Method for producing a press-form (a stamper) for shaping an information-carryin...  
JP3217609B2
PURPOSE: To produce a recording medium with a uniform recording layer by depositing an LB film of an org. material as a recording layer by the Langmuir- Blodgett's(LB) technique on a substrate, peeling the LB film and depositing it on ot...  
JP2001266417A
To perform high-quality transfer without any thermal deformation of bending in the manufacturing process of a recording medium for transferring an information signal generated on a stamper to a substrate.When the fine recessed and projec...  
JP2001260739A
To effectively avoid the fouling of a process device and damage caused by collision with other object and effectively inhibit vaporization of a process solution, in a volume-reducing process vehicle capable of reducing the volume of resi...  
JP2001515423A
One flat end mold cavity surface carries a mechanical pattern, directly or via nickel insert disc, corresponding with information to be formed on a carrier. One mold part has a cylindrical inner surface partly bounding mold cavity, and t...  
JP2001515637A
Method of making an optical information record. A substrate having a surface for carrying an information bearing layer is provided. A curable polymer is provided on said surface of the substrate. A flexible stamper is provided having an ...  
JP3207530B2
PURPOSE: To prevent the formation of a protrusion on the surface of the body of a disk when the body of the disk is squeezed and a clamping plate is connected. CONSTITUTION: A groove 17 is cut in the face 1B of the body 1 of a disk to be...  
JP3185832B2
PURPOSE: To provide a mold capable of taper-forming a center hole of a substrate for magneto-optical mini disks (MD-MO). CONSTITUTION: A cavity 23 of a form of a substrate 20 and a gate 83 of a ring form opened to a position correspondin...  
JP2001189034A
To provide an optical recording medium having sufficient rotational performance without deformation such as a warp or a sink and capable of sufficiently meeting a trend toward the higher recording density. A substrate 2 of the optical re...  

Matches 201 - 250 out of 1,205