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7479212 Method of manufacturing high-density data storage medium  
A high-density data storage medium, a method of manufacturing the data storage medium, a high-density data storage apparatus, and methods of writing data on, and reading and erasing data from the...
7465383 Master information carrier for magnetic transfer and its production method  
A master information carrier for magnetic transfer includes a master substrate made of metal, including an embossed pattern corresponding to information to be transferred. The master substrate is...
7294251 Process of producing master carrier for magnetic transfer  
A process for producing a master carrier contains steps of: forming a desired pattern on a support to form a resist pattern support; forming a first ferromagnetic thin film on the resist pattern...
6821334 Process for producing sulfonated solid particles  
A process produces a sulfonated solid particle by burning sulfur to yield gaseous sulfur dioxide, subjecting the gaseous sulfur dioxide to catalytic oxidation to yield gaseous sulfur trioxide, and...
6695987 Production method for optical disc  
The present invention is to provide a production method for an optical disc, capable of obtaining a good S/N ratio without deterioration of the stamper quality due to reaction with an electron...
6569299 Membrane partition system for plating of wafers  
An anode includes an anode cup, a membrane and ion source material, the anode cup and membrane forming an enclosure in which the ion source material is located. The anode cup includes a base...
6500602 Production of optical recording media having plural luminescent recording layers by embossing the recording layer  
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...
6475321 Method of manufacturing electrode substrate  
An electrode substrate comprises a backing substrate carrying thereon a metal electrode layer and/or a recording layer, the layer or layers having a smooth surface area with a surface roughness of...
6378205 Method for producing liquid ejecting head and liquid ejecting head obtained by the same method  
A method produces a liquid ejecting head having an ejection outlet for ejecting a liquid, a heat generating element for applying thermal energy to the liquid, a liquid flow path having a first path...
6308405 Process for preparing an electrode substrate  
An electrode substrate and a recording medium having a smooth surface with surface unevenness of 1 nm or less and a size of 1 μm.quadrature. or more are disclosed. An electrode substrate and a...
6146740 Magnetic recording medium and method of fabricating the same  
A read-only disk and a write-only disk recorded at high density having a magneto-optical film differing in coercive force depending on the information to be recorded disposed on a substrate. In the...
6080288 System for forming nickel stampers utilized in optical disc production  
A system and method for electro-forming a metal layer on a substrate. The system has a rotary jet planarizer in an electro-forming or galvanic cell. The cell includes a toroidally-shaped manifold...
5904827 Plating cell with rotary wiper and megasonic transducer  
A plating cell for plating a flat substrate employs a sparger to introduce a flow of electrolyte or other plating solution across the surface of the substrate to be plated. A fluid-powered rotary...
5843296 Method for electroforming an optical disk stamper  
The present invention includes an apparatus and method for continuously adjusting the anode/cathode distance for controlling uniformity of deposition. The entire cathode head is mounted on a lead...
5833828 Method and apparatus for thermal process control in the electroforming of stampers for production of CD/LD data carriers  
A method and an apparatus for thermal process control in electroforming stampers for the production of CD/LD data carriers or the like. The temperature of an electrolytic solution in an...
5785826 Apparatus for electroforming  
The present invention includes an apparatus and method for continuously adjusting the anode/cathode distance for controlling uniformity of deposition. The entire cathode head is mounted on a lead...
5742314 Ink jet printhead with built in filter structure  
An ink jet printhead body has an ink filter structure integrally incorporated therein and operative to filter ink flowing into its internal ink receiving channels disposed between piezoelectrically...
5683564 Plating cell and plating method with fluid wiper  
A plating cell for plating a flat substrate, for example, a stamper for a high-density compact disk recording, employs a sparger to introduce a flow of electrolyte across the surface of the...
5667658 Master for the duplication of sound recordings and process for its production  
A plate made of silicate glass (glass master) (3) is provided with a pressing surface (surface coat) carrying the sound recording in the form of raised contours formed from a photoresist (5) with a...
5612146 Soft-magnetic multilayer thin film for use in a thin-film magnetic head and a method of manufacturing the same  
A soft-magnetic multilayer thin film produced by electroplating, wherein an anode-dissolution process is effected by intermittently applying a reverse d.c. bias current with respect to the...
5323377 Electrical data recording and retrieval based on impedance variation  
Electrical data is recorded and retrieved by producing and detecting impedance change. A layer of high resistivity material on a conductive substrate is used as the recording layer. A conductive...
5312718 Method of manufacturing dies for pressing optical disks  
An optical disk die is manufacture from a laminated disk which includes a substrate, an overlying heat sensitive layer, a reflective layer, and a final output protective layer. A laser beam forms...
5167792 Master holder of stamper electroforming apparatus and electroforming method  
Disclosed are a master holder of a stamper electroforming apparatus and an electroforming method using this master holder. The master holder is for use in a stamper electroforming apparatus that...
5137617 Optical disk manufacture  
A method of reducing the surface noise of optical disk products of the type having a surface relief pattern is disclosed. In one embodiment, an adherent layer is applied to the substrate of the...
5096563 Method of manufacturing optical disk  
An optical disk manufacturing method comprises a step of preparing a master disk having an elastomer layer, formed on a transparent substrate and containing photosensitive dyes, and a polymer...
4964958 Method of producing a metal matrix  
Method of producing a metal matrix for the manufacture of optically readable information carriers, in which a photoresist layer which contains an information track and is provided on a carrier is...
4931147 Method of manufacturing a metal matrix  
A method of manufacturing a metal matrix which is suitable for the production of synthetic resin information disks, in which a master disk consisting of a glass supporting plate (1) and a...
4861437 Method of manfacturing a mould and providing it with a backing and mould manufactured according to the invention  
In a method of manufacturing a mould and providing it with a backing, the mould is derived from a parent information carrier by an electroforming process, after which electroforming process and...
4834843 Method of marking disc-shaped information carriers  
In a method of marking optically readable disc-shaped information carriers which are manufactured, for example, by a transfer-moulding process using at least one mould serving as a stamper, which...
4814047 Method for producing a prerecorded disk-shaped die  
A method for producing a prerecorded disk-shaped die is specified in which the information signal is recorded onto a metallic recording medium. According to the invention, the information carrier...
4758307 Method of manufacturing a data storage medium  
A data storage medium is provided which is suitable for production or replication by moulding, casting, embossing or a similar process against a tool. The method for manufacturing a data storage...
4615969 Method and apparatus for making a stamping master for video disk replication  
There is disclosed a new and improved method for making a stamping master for video disk replication wherein a film of material which is reversibly convertible between two stable states, one having...
4539079 Method and apparatus for electroforming a stamper for producing a high-density information recording carrier  
Method and apparatus for producing a desired thickness distribution on a stamping plate in a rotary electroforming process. The stamping plate is used to produce a high density information...
4534844 Electroforming apparatus  
A cathode head assembly is provided for holding a matrix during electroforming of a replica on the surface of the matrix. The cathode head assembly has a support member with an outer diameter at...
4507180 Method of electrodepositing a homogeneously thick metal layer, metal layer thus obtained and the use of the metal layer thus obtained, device for carrying out the method and resulting matrix  
The invention relates to a method for the electrodeposition of a homogeneously thick metal layer on the surface of a substantially flat cathode in which a screening member is placed in the...
4500393 Method for the manufacture of record stampers  
A method is provided for the manufacture of record stampers having electroformed inner and outer edges of a predetermined configuration. In the disclosed method, a flat matrix is formed from a...
4500392 Stamper and method for injection molding information bearing member  
An improved stamper and method involved in the replication of optically-readable information bearing members by means of an injection molding process utilizing a stamper having a conformal layer of...
4479853 Method for the manufacture of record stampers  
An improved method for the manufacture of stampers having formed inner and outer edges is provided in which the inner and outer edges are electroformed in the required configuration by using...
4474650 Method of manufacturing a mother matrix  
A method of manufacturing a metal mother matrix in which a master disk, which is a supporting disk, carrying on one side a layer of a positive photoresist in which an information track is provided,...
4468290 Apparatus for attaching a matrix to an electroforming device and method therefor  
An improved apparatus for attaching a record matrix to be replicated by electroforming to the cathode of an electroforming device is provided. The apparatus includes a positioning pin which...
4445995 Cathode head having improved seal means  
An improved cathode head is provided for use in the matrixing of masters, molds and stampers for use in the manufacture of molded records and discs. The cathode head of this invention has a disc...
4440604 Method for the manufacture of lapping disc for forming keels on videodisc styli  
In the matrixing process used in the manufacture of lapping discs employed in the production of videodisc styli, it has been found that the separation of the electroformed parts from the parts on...
4431487 Matrixing apparatus and method for use in the manufacture of molded records  
In order to provide an improved seal between matrixes and their replicas, as well as eliminating or substantially reducing the problem of premature separation of the replicas from the matrixes, a...
4430401 Method for producing a recording disc stamper  
An optical recording medium for use with a recording apparatus of the type that focuses onto the medium, as the medium is moved in a prescribed fashion, a beam of light that is modulated in...
4422904 Method for forming video discs  
An improved process for making video discs, which enables the molding of replicas having substantially higher signal-to-noise ratios during playback. One aspect of the invention extends the...
4415423 Electroforming apparatus for use in matrixing of record molding parts  
In the apparatus of this invention, filtered electrolyte is introduced immediately adjacent to the revolving cathode head of the apparatus and the filtered electrolyte is forced to flow along the...
4402798 Method for the manufacture of a metallic recording substrate for a capacitance electronic disc and the recording substrate obtained thereby  
In accordance with the present disclosure recorded metallic recording substrates made of a relatively soft metal are coated with a conformal 200 to 400 angstroms thick layer of chromium, chromium...
4400245 Matrixing process for the manufacture of molded records  
A process improvement is disclosed for use in the matrixing process employed in the manufacture of molded records. In accordance with the disclosure, a narrow texturized band is provided in either...
4394341 Method to center and separate electroformed replicas from a matrix  
An improvement is disclosed in the matrixing process employed in the manufacture of molded records. The improvement consists of using an insert in the matrixing process which is secured to the...
4391694 Apparatus in electro deposition plants, particularly for use in making master phonograph records  
Apparatus in plants, particularly for use in making master phonograph records and the like. In plants (FIG. 1) for galvanic processing in making master phonograph records, the apparatus in...
Matches 1 - 50 out of 83 1 2 >