Abstract:
The invention relates to a method for electroplating an article having a nanostructure to be plated in an electroplating apparatus comprising an electrolytic solution, as well as a first and a second pole for forming a cathode and an anode, respectively, in the electrolytic solution and a voltage source for applying a potential difference between the two poles. The method comprises the steps of electrically connecting the article having a nanostructure to be plated to the first pole and placing the article in the electrolytic solution, and forming a second metal film on the primary conductive layer by causing metal ions from the electrolytic solution to precipitate on the article having a nanostructure to be plated by applying a potential difference for a period of time between the second pole, which is connected as the anode, and the first pole, which is connected as the cathode. First a DC voltage is applied, and subsequently a periodically reversible voltage.
Abstract:
The present invention relates to a master substrate (10) for creating a high- density relief structure, particularly a master substrate (10) for making a stamper for the mass fabrication of optical discs or a master substrate for creating a stamp for micro contact printing, wherein an organic dye layer (12) is provided for creating the high-density relief structure. The present invention further relates to a method for providing a high density relief structure on a master substrate (10) comprising an organic dye layer (12), the method comprising the following steps: applying dye bleaching laser pulses on regions (30) of the master substrate (10) where pits (32) are to be formed; and removing the bleached regions (30) of the organic dye layer (12) by an etching process. The present invention also relates to a method for providing a high density relief structure on a master substrate (10), the method comprising the following steps: - providing a master substrate (10) comprising at least a polycarbonate layer (14) carrying an organic dye layer (12); forming bumps (20) at the dye/polycarbonate interface (16) by applying laser pulses; and removing the remaining dye layer by an etching process.
Abstract:
The invention provides a method for manufacturing an optical information carrier, in particular for producing a master disc by recording information comprising information units in the form of a pattern of geometrical structures in a stack of at least a recording layer (2) formed on a surface of a substrate (1). The recording layer comprises a phase-change material, in particular GeInSbTe. In the method of the invention, the recording layer is exposed to a laser beam to form an exposure pattern in the recording layer and the exposed layer is developed for creating the pattern in the recording layer corresponding to the exposure pattern.
Abstract:
The present invention relates to a master substrate (10) for optical recording comprising a recording layer (12) and a substrate layer (14), the recording layer comprises a growth dominated phase-change material, the chemical properties with respect to chemical agents of which may be altered due to a phase change induced by projecting light on the recording layer. For tracking purposes, the substrate layer comprises pre-grooves (16). The present invention further relates to a method of manufacturing a stamper for replicating a high-density relief structure.
Abstract:
The present invention relates to a device for manufacturing a master disc for mastering data on an optical record carrier. To achieve reduced jitter levels resulting from pit widths that are too large, which might result in cross talk effects during read out or even cross write effects during mastering, the application of a pulsed write strategy for manufacturing the master disc is proposed, wherein the pits are recorded by a sequence of a predetermined number of write pulses, said sequence including a number of write pulses having a light intensity of substantially zero.
Abstract:
An electron beam applying apparatus includes: a thermal field emission type electron source (12) emitting an electron beam; an electrostatic lens (14) disposed immediately below the electron source (12) and acting as a condensing electrode for condensing the electron beam in a first angular aperture emitted by the electron source in a second angular aperture smaller than the first angular aperture; a condenser lens disposed on a downstream side of the electrostatic lens (14) and condensing the electron beam condensed in the second aperture angel by the electrostatic lends (14) in a crossover point; and an objective lens (28) disposed on a downstream side of the condenser lens (18) and condensing the electron beam condensed in the crossover point by the condenser lens (18) on the surface of the material (32).
Abstract:
The invention relates to a master substrate, a method for making a highdensity relief structure, and optical discs replicated with the high-density relief structure, the master substrate comprising a substrate layer (10) and a recording stack deposited on the substrate layer, the recording stack comprising: - an information layer (12), - an interface layer (11) sandwiched between said information layer and the substrate, said information layer (12) comprising a growth-dominated phase-change material for forming marks and spaces representing an encoded data pattern, wherein said recording material is an alloy comprising at least two materials of the group of materials containing Ge, Sb, Te, In, Se, Bi, Ag, Ga, Sn, Pb, As. A very high-density relief structure is achieved.
Abstract:
The present invention relates to a device and a corresponding method for making a master record carrier (60) for use in making a stamper (64) for making replicated read-only optical record carriers (90). Rather than using irradiation with photons or electrons, it is proposed to make use of thermal-mechanical deformation of a thin organic layer in the record carrier. Therefore, the device according to the invention comprises: a recording head (1) for recording information in an information layer (62) of a master record carrier (60), said recording head (1) including a heatable tip (2) which can be displaced in at least one direction, a displacement means (3, 5, 6, 9) for displacing said tip (2) in the at least one direction, a heating means (7) for heating said tip (2) and a control unit (8) for controlling said heating means and said displacement means such that for recording a mark said tip is heated and displaced to be in contact with said information layer causing an indentation therein.