Abstract: An optical imaging lens module is provided. The optical imaging lens module may include a lens barrel and an optical imaging lens. The optical imaging lens may include a plurality of lens elements engaged with the lens barrel in an order from an object side to an image side along an optical axis. A first lens element is the lens element closest to the object side in the plurality of lens elements. The first lens element may include an optical effective portion and an optical ineffective portion surrounding the optical effective portion. The optical effective portion may include an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through. A border around the object-side surface may have an extension surface extending from the object side toward the image side.

Abstract: An apparatus includes a first roll and a second roll on each of which a pattern is formed, a first motor and a second motor to rotate the respective rolls, a shaft direction supporting mechanism to support the second roll along a shaft direction and an axial position adjusting mechanism configured to move the shaft direction supporting mechanism along the shaft direction. The posture of the rotating shaft of the second motor is maintained constant at all times, and the second roll is moved in the shaft direction along the first roll, thereby adjusting the positions of both patterns on the first roll and the second roll along the shaft direction.

Abstract: A method for manufacturing a female mold is provided in the embodiments of the disclosure, comprising: providing a substrate; forming a substrate layer of the female mold on the substrate; forming on the substrate layer of the female mold a mask layer which is adapted to exposure by an X-ray; and exposing the substrate layer of the female mold to the X-ray from a side of the mask layer away from the substrate. A direction in which the X-ray irradiates is inclined at a predetermined oblique angle to the substrate layer of the female mold, in the process of exposing to the X-ray. Besides, a female mold is also provided.

Abstract: The present disclosure provides a display assembly manufacturing apparatus and a method for manufacturing a display assembly. The display assembly manufacturing apparatus includes a holding platform configured to hold a display device; a covering plate configured to cover the display device, such that a supporting film molding space is formed between an inner surface of the covering plate and a surface of the display device, wherein the supporting film molding space is configured to receive a liquid material which is cured in the supporting film molding space, such that the liquid material is molded into the supporting film. According to the present disclosure, a supporting film having a smaller thickness is integrated with the display device.

Abstract: A receiving means for receiving and mounting of wafers, comprised of a mounting surface, mounting means for mounting a wafer onto the mounting surface and compensation means for active, locally controllable, compensation of local and/or global distortions of the wafer.

Abstract: Surface-structured, cross-linked silicone-based material and method for making the same. Embodiments of silicone-based materials described herein are useful, for example, in applications of light capture, anti-reflection, light redirection, light diffusion, hydrophobic surfaces, hydrophilic surfaces, light guiding, light collimation, light concentration, Fresnel lens, retro-reflection, drag reduction, air bleed adhesives, release liner, abrasion resistance, and anti-fouling.

Abstract: A flexible pipe body and method of producing a flexible pipe body are disclosed. The method includes providing a tubular layer; and directing a chemical reagent towards a surface portion of the tubular layer, wherein the tubular layer comprises an extruded polymer, and wherein the chemical reagent is suitable for changing one or more physical or mechanical property of a proportion of the extruded tubular layer thickness.

Abstract: A solar cell having on a light incident surface side an electrode with both low resistivity and high transparency to promote efficient excitation of carriers using inexpensive materials. The solar cell includes a photoelectric conversion layer, a first electrode layer arranged on the light incident surface side, and a second electrode layer arranged opposed to the first electrode layer. The first electrode layer has a thickness in the range of 10 to 200 nm, and plural penetrating openings, each of which occupies an area in the range of 80 nm2 to 0.8 ?m2, and has an aperture ratio in the range 10 to 66%. The first electrode layer can be produced by etching using an etching mask in the form of a single particle layer of fine particles, or of a dot pattern formed by self-assembly of a block copolymer, or of a stamper.

Abstract: A method by which optical filter structures may be applied onto a substrate that is transparent to light at least in the visible wavelength range suitable for a barrier filter. In such a method, an adhesive is applied onto the substrate; then, a photographic film comprising a base film and a photographic emulsion layer applied on it is brought into contact with the adhesive. The optical filter structures are impressed in the photographic emulsion layer by exposure, development and fixation. The side of the film brought into contact with the adhesive is the one that bears the photographic emulsion layer. The adhesive is then spread between film and substrate by means of a roller rolling across the film at a specified contact pressure and a specified feed rate of the roller and thus pressing the film against the substrate. A permanent joint between substrate and photographic emulsion layer is then established by the curing of the adhesive.

Abstract: A method of determining conditioning pulse parameters for an optical element includes directing a pump pulse to impinge on the optical element and directing a probe pulse to impinge on the optical element. The method also includes determining a first time associated with an onset of electronic excitation leading to formation of an absorbing region of the optical element and determining a second time associated with expansion of the absorbing region of the optical element. The method further includes defining a turn-off time for a conditioning pulse between the first time and the second time. According to embodiments of the present invention, pulse shaping of the conditioning pulse enables laser conditioning of optical elements to achieve improvements in their laser induced damage threshold.

Abstract: A laminate nanomold includes a layer of perfluoropolyether defining a cavity that has a predetermined shape and a support layer coupled with the layer of perfluoropolyether. The laminate can also include a tie-layer coupling the layer of perfluoropolyether with the support layer. The tie-layer can also include a photocurable component and a thermal curable component. The cavity can have a broadest dimension of less than 500 nanometers.

Abstract: A photo-curable transfer sheet having a photo-curable transfer layer comprising a photo-curable composition, the photo-curable composition being deformable by application of pressure and containing a reactive polymer having a photopolymerizable functional group, wherein the photo-curable transfer layer shows linearity in relationship between strain [?] (%) and time [t] (second) measured by a creep test using a dynamic viscoelasticity measuring apparatus under the conditions of an ordinary temperature, stress of 50 Pa and a time period of 120 seconds, and satisfies a following formula: log ?=a+b·log t, in which “a” is a real number, and “b” is in the range of 0.10 to 0.53; and a process for the preparation of an optical information recording medium using the sheet and an optical information recording medium.

Abstract: An apparatus for forming a pattern using a laser is provided. The apparatus includes a pattern storing unit, a controller, a laser oscillating unit, an X-Y driver, a header unit, and a stage. The pattern storing unit stores data on light guide patterns of a discontinuous straight line shape. The controller transmits position signal of the light guide patterns to the X-Y driver and simultaneously, transmits a switching signal to the laser oscillating unit. The laser oscillating unit outputs a laser beam synchronized with a movement of the header unit. The X-Y driver moves the header unit and the stage. The header unit moves along a first guide rail. The stage moves along a fixed second guide rail in the front and rear direction of the light guide panel.

Abstract: Methods create images viewable under different selected angles on optical storage devices and other photosensitive surfaces and optical storage devices with super-imposed images. Generally, a photosensitive surface is exposed with multiple diffraction patterns creating super-imposed images. These diffraction patterns create super-imposed images on the photosensitive surfaces, which can be read by either a human or a computer.

Abstract: Recording media press systems and methods of operating such press systems. Press system embodiments include a first foil holder coupled to a first die, the first foil holder including a plurality of first tabs extending radially inward from the first die to clamp first portions of an outer perimeter of a first embossing foil against a surface of the first die and a second foil holder coupled to a second die, the second foil holder including a plurality of second tabs extending radially inward from the second die to clamp second portions of an outer perimeter of a second embossing foil against a surface of the second die. In an embodiment, the first and second outer perimeter portions are complementary arc segments to interdigitate the plurality of first tabs with the plurality of second tabs when the press is closed.

Abstract: A transfer layer on a surface of a mold has a thickness distribution along the radius direction that the layer is thick in an inner round portion but is gradually thinner toward an outer round portion. An adhesive layer is formed between a surface of a signal substrate which bears a signal recording film and the mold which seats the transfer layer. The adhesive layer has a thickness distribution that the layer is thin in an inner round portion but is gradually thicker toward an outer round portion. Since the thickness distributions along the radius direction of the transfer layer and the adhesive layer are opposite to each other, the thickness distribution of an isolation layer which comprises the two layers is uniform.

Abstract: A method for manufacturing an optical waveguide includes: step A of forming a first resin layer 23 by allowing a first liquid-state resin to flow to be extended in a manner so as to bury and enclose cores 22; step B of forming a second resin layer 25 by allowing a second liquid-state resin having a viscosity higher than that of the first liquid-state resin to flow to be extended on the first resin layer 23, after or while the first resin layer 23 is heated; and step C of forming an over-cladding layer 26 by curing the first resin layer 23 and the second resin layer 25.

Abstract: Photopolymer resins are disclosed which includes metal and/or ceramic surface chelating agents to provide strong bonding of the photopolymer resin to the inorganic surface of the first information layer of an optical disc. The resins also include a fast surface cure and glass transition temperature controlling monomers that provides easy stamper separation The disclosed photopolymer resins also include short wavelength (<405 nm) surface cure initiators. The resins may also optionally include shrinkage control oligomers and/or polymer fillers or a combination of both Use of the disclosed resins eliminates two steps from the manufacture of a multiple information layer optical disc as the formation of spacer layers and the curing of spacer layers is no longer necessary.

Abstract: An optical disc manufacturing method includes: an injection step of injecting a liquid material into a circular plate-shaped injection space having a center hole portion at a center from an injection hole connected to an inner edge portion in the injection space; a discharge step of discharging air and the liquid material from a discharge hole formed on a straight line passing through the injection hole and a center of the center hole portion in a plane direction of the circular plate and at a position opposite to the injection hole; a curing step of curing the liquid material injected into the injection space; and a takeout step of taking out the cured liquid material from the injection space.

Abstract: Systems and methods for imprinting a patterned layer on a substrate are described. Features of patterned layer may be concentrically imprinted in relation to a shaft positioned on a substrate chuck. The substrate may be biased using a radius difference between a diameter of the shaft and an inner diameter of the substrate in relation to a point on an inner edge of the substrate.

Abstract: A mold is provided, at an outer circumferential region thereof, with portions to be gripped, to allow a transfer apparatus to perform transferring to an object. The portions to be gripped are formed in a different shape from the remaining portion of the outer circumferential region. For a mold set including two molds, each of the molds is provided, at an outer circumferential region thereof, with portions to be gripped, to allow the transfer apparatus to perform transferring to the object. The portions to be gripped are formed in a different shape from the remaining portion of the outer circumferential region. The portions to be gripped of one of the molds and the portions to be gripped of the other mold are disposed at different angular positions.

Abstract: An imprinting device has a fixed side pressing structure and a movable side pressing structure that is movable toward and away from the fixed side pressing structure. The fixed side pressing structure includes a fixed base plate, a positioning pin for positioning a fixed stamper and a recording medium substrate, and a fixed stamper support for holding the stamper in place using suction. The movable side pressing structure includes a movable base plate, a positioning pin for positioning a movable stamper, and a movable stamper support for holding the movable stamper in position using suction, electromagnetism or adhesive.

Abstract: A method for manufacturing a disc includes the steps of performing laser exposure of an inorganic resist master on which a photosensitive layer is formed using an inorganic material, which protrudes in an exposed region, and a surface coat layer is formed on the surface of the photosensitive layer in order to control the shape of protrusion, transferring the shape of protrusion formed by the laser exposure on the inorganic resist master to produce a stamper on which a portion corresponding to the shape of protrusion is a depression, forming a resin substrate using the stamper so that a portion corresponding to the shape of protrusion is a protrusion, and forming a predetermined layer structure on the resin substrate to produce an optical disc.

Abstract: The present invention provides an imprinting apparatus in which stampers, after a transfer step, can be readily and quickly detached from a substrate and an atmosphere in the imprinting apparatus is kept clean. The imprinting device has an ejecting mechanism for separating a recording medium substrate from a first stamper and a second stamper the ejecting mechanism being formed including a sleeve and a coil spring that are movably provided in a movable die base with an exhausting duct, and also including a sleeve and a coil spring that are movably provided in a fixed die base with an exhausting duct.

Abstract: The invention relates to a method and a device according to the preambles of claims 1 and 10, and also to the use of a nanopatterned die, a disc with a defined nanopattern and a hard disk drive comprising a disc of this type. In order to propose a more rapidly operating device as well as a corresponding method in which the smallest-possible patterns can be applied to discs, and in order to provide discs, which are produced as cost-effectively as possible, for hard disk drives, said discs having smaller patterns and thus being able to be produced rapidly and cost-effectively, the invention proposes using microcontact printing (?CP) in the production of micropatterned and/or nanopatterned products/substrates of this type.

Abstract: Techniques for producing optical medium that can be read at substantially high speeds with greater stability and accuracy are disclosed. According to one aspect of the techniques, a molding station includes an optimized stampler which does not have an exact inverse image of a replica. To account for an inherent distortion in a substrate after being stamped, a stampler is pre-distorted so that the pit geometry in the stamped substrate becomes nearly perfect after the inherent distortion. In one embodiment, the injection of a molten material, the mold position and compression are respectively controlled to account for possible non-uniform density distribution of the material. To provide an effective bonding process, a bonding station is employed with what is referred to as index bonding technique and/or pulse bonding technique. The index bonding is provided to ensure that non-flatness of substrates is compensated when two substrates are bonded together so as to minimize possible dynamic imbalance of a disc.

Abstract: An optical disk manufacturing apparatus which employs first and second signal layer forming mechanisms, a reflection layer forming mechanism, a light transmission layer forming mechanism and first, second and third transportation mechanisms. The apparatus further includes a liquid material supplying mechanism, a first and second rotation mechanism, first and second hardening light radiation apparatuses, a ring-shaped mask portion, and a mask transfer mechanism.

Abstract: The method of the present invention includes: an exposing process in which an inorganic resist layer 101 formed on a substrate 100 is irradiated with recording laser light modulated by an information signal corresponding to an information signal of an information concave and convex pattern formed on an optical disc to form an exposed pattern corresponding to the information concave and convex pattern on the optical disc, and after the above process a development process in which development processing is performed on the inorganic resist layer to form a concave and convex pattern corresponding to the information concave and convex pattern of the inorganic resist layer; in the above exposing process, after a trial exposure is performed on a non-recording area of the above resist layer, the exposed portion is irradiated with evaluation laser light and a recording signal characteristic of the above resist layer is evaluated from the reflected light to determine based on the evaluation result an optimum focus pos

Abstract: An imprint embossing alignment system. In one embodiment, the system includes a die having a bottom surface, an embossing foil positioned above the bottom surface, and a mandrel, to receive the substrate, having a rod portion that extends through a central portion of the die. The system also includes a ball bushing positioned around the rod portion and a ring portion positioned between the ball bushing and the embossing foil to hold a precise alignment of a centerline of the rod portion and a centerline of the embossing foil.

Abstract: A method for manufacturing an optical disc master using an existing exposure system, and a method for manufacturing an optical disc having higher recording capacity. The method for manufacturing an optical disc, using a master to produce the optical disc having an irregular pattern thereon, the master being produced by the steps of forming a resist layer composed of a resist material including an incomplete oxide of a transition metal such as W or Mo on a substrate, the oxygen content of the incomplete oxide being smaller than the oxygen content of the stoichiometric composition corresponding to a valence of the transition metal; selectively exposing the resist layer with laser according to a recording signal pattern using a light source with an irradiation power that is less than an irradiation threshold power at which exposure of the resist starts; and developing the resist layer to form the predetermined irregular pattern.

Abstract: A method for rating an information recording medium according to the present invention includes the steps of: receiving a digital read signal, which has been generated based on an analog read signal representing information that has been read from the information recording medium, and shaping the waveform of the digital read signal; subjecting the shaped digital read signal to maximum likelihood decoding, thereby generating a binarized signal showing a result of the maximum likelihood decoding; and calculating the quality of the digital read signal based on the shaped digital read signal and the binarized signal. If the quality of the read signal is calculated by a PRML method in which a number of zero-cross portions are included in a merging path of a minimum difference metric, the quality is calculated by using only a state transition pattern in which only one zero-cross portion is included in a merging path of a non-minimum difference metric.

Abstract: Optical qualities of a production lot of base material used in the fabrication of semi-finished lenses may be accurately determined by employing chipper plate samples produced from the base material in accordance with aspects of the present invention. In various implementations of the present invention, the chipper plates samples may be fabricated by subjecting base material to an extended cycle time and temperature profile using a mold having cavities of different thicknesses. The resulting chipper plates provide an improved indication of the color of semi-finished lenses molded from the production lot as well as an improved indication of resin stabilizer defects that may be utilized during a pelletizing process to control and enhance the quality of a production lot. Furthermore, the chipper plates may be provided by suppliers as samples of a production lot to enable customers to base purchasing decisions on a reliable and accurate measure of optical properties.

Abstract: A method for manufacturing a plate-like structure, the method including a step of transferring concave and convex patterns on a master to a surface of a transferred substrate by sandwiching the master provided with the concave and convex patterns and the transferred substrate, between a press surface of a hollow cylindrical upper and a press surface of a lower mold, and pressurizing central parts of the upper and lower molds to apply pressure to the master and the transferred substrate, wherein a compressive load imposed on inner peripheral portions of the upper and lower molds is blocked and distributed toward outer peripheries of the upper and lower molds.

Abstract: To provide a mold structure used to produce a discrete track medium, including in a surface of the mold structure: a plurality of line pattern forming concave portions which are positioned so as to be adjacent and substantially parallel to each other; and a communicating concave portion which is positioned so as to intersect the line pattern forming concave portions and connects the line pattern forming concave portions.

Abstract: A vacuum transfer apparatus including an auxiliary vacuum chamber and a main vacuum chamber is used for transferring an uneven pattern to a disk substrate with a stamper. The auxiliary vacuum chamber is vacuumized or opened to air because the disk substrate is conveyed to and from the vacuum transfer apparatus through the auxiliary vacuum chamber. The disk substrate conveyed to the auxiliary vacuum chamber and then to the main vacuum chamber after the auxiliary vacuum chamber is vacuumized. In the main vacuum chamber, transferring of the uneven pattern with the stamper, curing of UV-curable resin, and removal of the stamper are performed to provide a disk substrate with the uneven pattern. Then, the disk substrate is conveyed from the vacuum transfer apparatus through the auxiliary vacuum chamber. An operation at the auxiliary-vacuum-chamber side and an operation at the main-vacuum-chamber side are performed in parallel.

Abstract: A production method of an objective lens for optical pickup apparatus having a numerical aperture NA of image side of 0.80 to 0.90 is disclosed. The method includes steps of molding resin composition containing copolymer of ?-olefin and a cyclic olefin represented by Formula (I) or (II) to form lens shape, and thermally processing the molded product under a condition at a temperature between Tg ?45° C. and Tg ?15° C. for 12 to 168 hours, wherein the Formula (I) and (II) is detailed in the specification.

Abstract: This invention relates to a stamper for optical disc and a method for manufacturing an optical disc by using this stamper. A photoresist is applied to a substrate (2) and this photoresist is exposed, developed and then transferred to form a disc master which has a recess/protrusion pattern formed on its one side. The one side of the disc master (20) is etched to narrow the width of a protruding part constituting the recess/protrusion pattern, and the recess/protrusion pattern of the disc master (20) with the reduced width of the protruding part is transferred to form a stamper (30). The recess/protrusion pattern provided on the stamper (30) is transferred to form a predetermined pattern on a substrate of an optical disc.

Abstract: Provided is a light transmissive stamper having light transmissivity with respect to an ultraviolet ray and durability for repeated use. Specifically, on a light transmissive substrate, a light transmissive auxiliary layer and an inorganic resist layer are formed sequentially, and a light beam is selectively irradiated to the inorganic resist layer, to thereby modify an inorganic resist ranging from a surface of the inorganic resist layer to a surface of the light transmissive auxiliary layer. Then, a part modified by the light beam or an unmodified part is selectively removed until the light transmissive auxiliary layer is exposed, thereby forming an uneven pattern corresponding to an information pattern in the inorganic resist layer.

Abstract: A method for forming fine concavo-convex patterns by using a relief formation material 3 having a relief formation layer 2 composed of a resin having thermoplasticity and a relief pattern sheet 6 having on a surface thereof fine concavo-convex patterns 5, wherein a photothermal conversion layer 7 is formed in the relief formation material 3 or the relief pattern sheet 6; the photothermal conversion layer 7 is irradiated with light 8 to make the photothermal conversion layer 7 generate heat in the state that the relief formation layer 2 is brought into contact with the fine concavo-convex patterns 5; and the fine concavo-convex patterns 5 are formed on the relief formation layer 2.

Abstract: In a flexible transfer body employing curable resin as a transfer material, thickness unevenness in a substrate and a transfer layer is reduced and the thickness of the transfer layer is made to be uniform. Liquid curable resin is coated onto a rotation center or the vicinity of the rotation center of a mold, which is a rotator having a functional form on a surface thereof. A flexible film is brought into contact with a surface of the coated curable resin in a liquid state and the curable resin is spread to the circumferential edge of the mold by a centrifugal force. And the curable resin is cured by supplying chemical or thermal energy thereto and the curable resin is separated from the mold, thereby obtaining a flexible transfer body in which the curable resin is transferred to the film.

Abstract: A pattern drawing apparatus which is capable of reducing manufacturing costs of information recording media. A partial drawing process is executed in response to output of a reference signal, for drawing, after being on standby for a predetermined standby time period, pattern segments, which are obtained by dividing patterns forming a servo pattern in the direction of the width of the patterns, by irradiation of a resin layer with an electron beam. A drawing position-changing process is executed for changing the irradiation position of the electron beam on the resin, toward a center of rotation of a substrate or away from the center of rotation, within a range of the effective drawing width of the electron beam. These processes are executed a plurality of times to draw an exposure pattern on the resin layer.

Abstract: A method of making composite discs continuously, including forming for each disc a first, a second layer, and a third support layer, each support layer being disc shaped and having a first surface with information indicia. An information layer is added to each support layers respectively. The said first and third support layers are positioned in a facing relationship, with the first and third information layers being adjacent. The third support layer is then separated from the third information layer, which thus remains attached to the first support layer. The first and second support layers are then joined. These steps are performed on a manufacturing line with conveyor belts transferring the support layers from station to station.

Abstract: A method of manufacturing a stamper/imprinter for patterning a recording medium via thermally assisted nano-imprint lithography, comprising steps of: selecting a recording medium for patterning, comprising a substrate with a first coefficient of thermal expasnsion (CTE); providing a first stamper/imprinter comprising a topographically patterned surface having a correspondence to a selected pattern to be formed in a surface of the medium; providing a sheet of a material having a second CTE matching the first CTE; molding a layer of a polymeric material surrounding the sheet of material and having a surface in conformal contact with the topographically patterned surface of the first stamper/imprinter; and separating the layer of polymeric material from the patterned surface of the first stamper/imprinter to form a second stamper/imprinter comprising a topographically patterned stamping/imprinting surface having a correspondence to the selected pattern.

Abstract: Optical disks are formed using mother stampers having a spiral groove and/or a spiral pattern of pits corresponding to the pattern from an original laser cut. The mother stamper is the mirror image of the corresponding father stamper. Injection molding of polycarbonate material or other suitable material using the mother stamper forms an optical disk having lands and bumps corresponding to the original laser cut. A phase-change material having constructive change in phase and thickness is deposited over the polycarbonate material to create the disk. Data is written to and read from the lands, and tracking is performed on the wobbled lands.

Abstract: This manufacturing device for an optical disc includes: a disc-supporting base on which a disc substrate is mounted; a pin-shaped member arranged at a center of the disc-supporting base, and is movable in the vertical in a center hole of the disc substrate; and a capping member which is slidably placed on a top of the pin-shaped member, and closes the center hole of the disc substrate, wherein when the capping member placed on the top of the pin-shaped member is lowered such that a back face of the capping member contacts an around of the center hole of the disc substrate mounted on the disc-supporting base, the capping member slides on the top of the pin-shaped member.

Abstract: A method for producing optical discs is provided. A substrate for an optical disc is formed by utilizing a molding process. A textured surface is formed at an outer diameter edge of the substrate. A protective coating is applied to cover the textured surface at the outer diameter edge. The protective coating adheres securely to the textured surface at the outer diameter edge to prevent seepage of moisture into the optical disc through the outer diameter edge surface. Thus, an improved optical disc which avoids moisture-caused warpage, corrosion and/or oxidation can be formed.

Abstract: A device and a method are disclosed for producing an optical data medium, in particular high density optical media, such as the recently developed BlueRay™ disk for illumination with a blue laser (??405 nm). The required thickness of the data and/or protective layers is of the order of at most several tenths of millimeters. Such thin layers are difficult to produce with conventional injection molding processes. The disclosed device and method solve this problem by overflowing an element placed in a narrow cavity with a low-viscosity material having a viscosity lower than the viscosity of polycarbonate, which then forms the data or protective layer, or by bonding a layer produced in this manner to another layer using a low-viscosity adhesive.

Abstract: In order to control a warp of a disc substrate so as to be a desired level, an optical disc production method includes: a step of supplying resin on the disc substrate; a step of mounting the disc substrate on an inside diameter portion of a turntable after supplying the resin; a step of providing an air-gap between an outside diameter portion of the turntable and a portion of the disc substrate that is not mounted; a step of extending the resin by spinning; and a curing step of curing the resin while spinning the disc substrate mounted on the inside diameter portion of the turntable, wherein in the step of extending the resin, a negative pressure is affected on a portion of the disc substrate that is not mounted, and in the curing step, the warp is controlled by curing the resin on the spinning disc substrate while maintaining effect of the negative pressure.

Abstract: A method of manufacturing an optical disc includes molding a first disc substrate by a first mold simultaneously with a second disc substrate by a second mold while controlling the temperature of the first and second molds by passing a temperature-controlling medium through temperature controlling flow passages provided in the vicinity of a boundary between the first and second molds.

Abstract: A stamper is formed so that a thickness between a concave/convex pattern formation surface, where a concave/convex pattern is formed, and a rear surface gradually decreases in a predetermined area of the stamper. The predetermined area corresponds to an area where pressure is likely to be concentrated when the concave/convex pattern of the stamper is used to form a concave/convex pattern on a substrate. A method of forming a concave/convex pattern uses such stamper, and a method of manufacturing an information recording medium uses a concave/convex pattern formed by such method.