Abstract: An information recording apparatus capable of forming a fine mark reliably and highly precisely through compensation for thermal interference and heat accumulation. The information recording apparatus is provided with a recording energy irradiating unit for generating at least two recording waveforms when marks of the same length or spaces of the same length in a channel data sequence are recorded. The information recording apparatus constructed as above can realize highly reliable recording/reproducing operations and can be made compact at a low cost with a large storage capacity.

Abstract: A continuous plasma CVD apparatus, characterized in that frequency of high-frequency bias is in the range of 50-900 KHz, a blocking condenser is provided between a thin film and a high-frequency source so that the product C.multidot.f of electrostatic capacity C of the blocking condenser and frequency f of the high-frequency source is 0.02 [F.multidot.Hz] or more, and the total of impedances of all the rollers provided in the route of from a substrate unwind roller to a rotating drum is 10 k.OMEGA. or more and the total of impedances of all the rollers provided in the route of from the rotating drum to a wind roller is 10 k.OMEGA. or more. According to this apparatus, it becomes possible to continuously form a film without causing damage and deterioration of the substrate.

Abstract: Learning marks are recorded in a learning region preceding a data recording region of the track. The positions of information recording lattice points are staggered by one lattice point between two contiguous tracks. At reading of recorded information, a two-dimensional information leakage amount is detected by the reproduced signals from a learning mark preceding a target information recording lattice point on a track, and from the information recording lattice points immediately before and after the learning mark in question. The equalization coefficients are calculated from leakage amount thus obtained. The crosstalk present in a reproduced signal for the target lattice point is removed by using this equalization coefficients and a pair of reproduced signals from intermediate lattice points which are located immediately before and after the current lattice point and which are not used to record information marks.

Abstract: A tape cartridge comprising a housing case which comprises an upper wall and a lower wall both having a pair of holes for receiving driving shafts and a covering plate which covers the holes on the upper wall, the upper and lower sides of which can be clearly identified so that misloading is prevented.

Abstract: Scratches on the recording disk caused by sliding of a disk cartridge shutter is prevented by slidably inserting first and second shutters between a tray and a case on the opposite side to a recording disk accommodating portion of the tray. The first shutter simultaneously opens and closes a case side driving shaft insert hole, a case side head insert hole, a tray side driving shaft insert hole, and a tray side head insert hole. The second shutter opens and closes a terminal hole. The second shutter is opened independently of the first shutter and is held in a position so that the case side driving shaft insert hole, the case side head insert hole, the tray side driving shaft insert hole, and the tray side head insert hole are not closed. Closing the first shutter, however, causes the second shutter to also close.

Abstract: Data and directories are separated and stored on separate parts of an optical disk. Directories are on the inner tracks and data are on the outer tracks, in a first format. Data and directories are written from magnetic disk storage in a different second specific format that is determined by a particular operating system used by an information processor. A medical information processing system is provided with an external magnetic disk storage and the optical disk.

Abstract: A magneto-optical recording medium comprising, on a substrate, at least a first magnetic layer made of a rare earth amorphous alloy and a second magnetic layer made of a rare earth amorphous alloy having a relatively smaller coercivity Hc.sub.2 than that of the first magnetic layer, wherein the following relationship is satisfied at an operation temperature:Hw.sub.1 -Hexc.sub.1 >Hc.sub.2 -Hexc.sub.2where Hw.sub.1 represents the magnetic domain wall coercivity of the first magnetic layer, Hexc.sub.1 represents the magnitude of the exchange magnetic field exerted on the first magnetic field and Hexc.sub.2 represents the magnitude of the exchange magnetic field exerted on the second magnetic layer is used, to obtain a magneto-optical recording medium with no increase in the noises by overwriting, and without reduction of C/N ratio after repeating recording for a number of cycles, a recording method and overwriting method using the media and a magneto-optical recording device.

Abstract: A fabricating method of a laminated semiconductor device wherein two or more semiconductor chips are stacked as tape carrier packages and the tape carrier packages are mounted on at least one side of the printed wiring board so that outer connection leads provided in the tape carrier packages are stacked to be connected to the terminal porions of the printed wiring package, which includes stacking two or more tape carrier packages and aligning the outer connection leads of the tape carrier packages in the stacked direction, temporarily bonding the stacked outer connection leads to one another to combine the stacked tape carrier packages into one block, and placing the block on the printed wiring board and passing the terminal portions formed on the printed wiring board and lowermost outer connection leads of the block through a heating furnace to thereby solder them.

Abstract: A lid locking mechanism for a magnetic tape cassette intended to improve dust prevention and drip wherein a shutter for opening and closing of tape end detecting windows is integrally provided with a front lid stopper member for the tape cassette.

Abstract: According to this invention, since the range of power necessary for erasing an overwritable magneto-optical recording medium is set to 2.5 mW or above, overwriting is possible without erase residue due to mark (magnetic domain) diameter difference, tracking offset, ambient temperature variation and characteristic dispersion between magneto-optical recording media and thus the magneto-optical recording medium has high reliability. Moreover, the rate of change, K of the switching field of the memory layer relative to temperature at around an erase start temperature can be controlled to be a constant value so that an erase power margin can be increased and that the tolerance to the reading light when the ambient temperature rises can be improved.

Abstract: A magneto-optical disk which has a circular disk form and comprises a substrate provided with information pits and a guide groove, a recording medium layer provided on the substrate, and a protective layer formed of at least one thin film on the medium layer, in which the surface of the protective layer is minutely roughened to have a concave rough pattern and not to substantially protrude beyond a reference level composed of the outermost surface portions of the protective layer. When the magneto-optical disk is subjected to recording by a CSS system using an air floating magnetic head conforming to high-frequency recording in a magnetic field modulation type recording, which is one of methods of overwrite recording on magneto-optical disks, the minute concave rough pattern formed on the surface of the disk substrate prevents such troubles as adhesion of the magnetic head to the surface of the disk and collision between the disk substrate being rotated and the head.

Abstract: An optical recording medium is made by sputtering a polymeric material in an evacuated chamber to form an under layer on a substrate having a preformed grooved pattern of prepits and pregrooves, and then forming a recording layer on the underlayer in the chamber continuously after forming the underlayer. Said under layer is made of a high polymeric material which can be melted, sublimated, or decomposed at a lower temperature than the melting point, the sublimating point, or the decomposing temperature of said recording layer. Accordingly, said under layer can relax the thermal shock transferred from said substrate into said recording layer, and the deformation of said substrate can be prevented, even though a laser beam for playback is repeatedly radiated onto said recording layer, and said optical recording medium has a larger recording sensitivity than the recording sensitivity of an optical recording disc of a prior art.

Abstract: There is disclosed an optical information recording medium comprising forming at least a recording or reflecting film on one surface of a substrate, wherein an plasma-polymerized film of a halogen-containing resin is formed on at least one of the surface of the substrate or the outer surface of the recording or reflecting film. The medium may further include an additional UV-curing film which is formed on any of the surface of the substrate or plasma-polymerized film of halogen-containing resin on the surface of the substrate, the recording or reflecting film, or the peripheries of the substrate and protective film.

Abstract: A disc cartridge comprising a cartridge case for rotatably accommodating a disc and a shutter for opening and closing at least one head accessing opening defined on the cartridge case, wherein the shutter comprises at least one plate member for opening and closing the head accessing opening and a connecting plate connected with one end of the plate member facing to one end face of the cartridge case, a first engaging member formed on the connecting plate toward the one end surface of the cartridge case and a second engaging member formed on the one end face of the cartridge case for engagement with the first engaging member to slidably mount the shutter on the cartridge case.

Abstract: A disk cartridge having a cartridge casing provided with head entry apertures and rotatably housing a disk recording mechanism. A shutter opens and closes the head entry apertures. Springs elastically urge the shutter in the closing direction. The shutter has at least cover parts for closing the head entry apertures. A front plate is integrally connected to the cover parts and is slidable along the front surface of the cartridge casing. An engaging part engages with a shutter opening member, and is provided at the end of at least one side of the front plate so as to project forward from the front plate.

Abstract: A recording disc cartridge, having a disc supporting plate with a contacting surface to which a recording disc is secured, wherein the contacting surface is used for detachably contacting a reference surface of a disc drive device so as to provide for easy correction positioning of the recording disc relative to the reference surface of the disc drive.

Abstract: A magnetic recording medium comprising a non-magnetic substrate, a soft magnetic layer formed thereon, and a perpendicularly magnetizable layer formed on the soft magnetic layer, where at least the soft magnetic layer is a vapor deposited mixture layer composed of an organic material and a ferromagnetic material, has distinguished flexibility and durability.