Abstract: A circuit element 1 according to the present invention has a first element 2 and a second element 3 that are stacked, with a conductor 5 of the first element 2 contacting a conductor 7 of the second element 3. Contact portions 9 are arranged such that the interval of a gap between adjacent contact portions 9 is less than or equal to one-quarter of a propagation wavelength of an electromagnetic wave. Such a configuration eliminates adverse effects due to electromagnetic waves, leaking into the interval portion between adjacent contact portions, and enables stable function formation.

Abstract: In accordance with an exemplary aspect of the present invention, a method of manufacturing a component includes forming a resin block by a resin molding method such that a peripheral region including a region where a through-hole is formed is formed as a convex portion in one of front and back surfaces, and the other surface has a hole in a region where the through-hole is formed, removing the convex portion so that the hole completely penetrates the resin block, forming a conductive film on an exposed surface of the resin block, and electrically connecting conductive films formed on the front and back surfaces of the resin block.

Abstract: A disk magazine accommodating therein a plurality of disks having a thickness of 0.3 mm or less and constructed to be made integral with a recording unit, in which management information including hysteresis information and inherent information of disks accommodated in the disk magazine is recorded. The management information includes, as inherent information of disks, information of a defective disk, or information of a disk pulled out from the disk magazine to be missed.

Abstract: The present invention balances functions of an optical recording medium conflicting format-wise, such as effective placement of recording capacity and emphasis on random access performance. An optical disk in an optical disk format for random access which records management information and an optical disk for sequential recording are both stored in an optical disk magazine for storing multiple slim optical disks in the same magazine case.

Abstract: An optical disk includes a recording region formed on a substrate for recording user data, and a management region formed on the substrate which includes an identification information region for recording disk-specific identification information such as address information (ID), a SYNC code, or an error detection code (EDC). The identification information region in this optical disk has a flat portion (a mirror region) formed by means of sectioning part of a groove or a land in a given step. The disk-specific identification information is recorded on the identification information region inclusive of this mirror region as irreversible record marks. Moreover, a signal of the disk-specific identification information is detected by a laser beam which is servoed on the recording track of this optical disk. Then, a change in the detected signal level of the disk-specific identification information is detected based on a predetermined threshold level.

Abstract: A disc-shaped optical record carrier includes a first area having a spiral track extending in a first direction from an inner side on the disc, and a second area having a spiral track extending in a second direction opposite to the first direction, from an outer side on the disc located on the same plane as the first area on the disc, wherein one of the first and second areas is assigned a recordable area and the other is assigned a read only area.

Abstract: An optical disc includes a plurality of lands and grooves alternately arranged in a radial direction of the optical disc, each land wobbling in the radial direction and recording a header recording part for holding address information, there being a difference in elevation between each land and each groove, each grove having a data recording part for storing data, wherein the header recording parts offset alternately for respective lands in the radial direction, the data recording part in the groove and the header recording part in the land are arranged offset in a circumferential direction of the optical disc, and the header recording part in each land enables the same address information to be reproduced for two groove at both sides of each land.

Abstract: An information-recording medium of write once or rewritable type designed to have narrow tracks is provided, in which the wobble signal amplitude is scarcely fluctuated by crosstalk. The medium includes recording tracks formed in a spiral form and meandering at a predetermined wobble cycle T, and a plurality of zones constituting each of the recording tracks, each of the zones having a principal area formed to have a predetermined wobble phase. A relationship of T>80b holds between the wobble cycle T and a channel bit length b of recording data. The wobble phase of one of the recording tracks is adjusted so that an average phase difference d is d>?/2 between the wobble phase in the principal area in the zone and a wobble phase of an area in the recording track disposed adjacently on an inner circumferential side or an outer circumferential side of the principal area, in relation to all of the recording tracks disposed adjacently in the radial direction.

Abstract: An information-recording medium is provided, which comprises a logical block recorded with secondary information and including an address information area, wherein the secondary information is recorded by inverting the phase of a fixed pattern including, for example, a synchronization signal or a resynchronization signal recorded in the logical block. Those used as the pattern for recording the secondary information are fixed patterns including, for example, a wobble pattern, a pit pattern, a recording pattern, and a domain pattern. Therefore, no trouble arises in the reproducing operation of a medium-driving apparatus.

Abstract: An optical disk recording and reproducing method. In a system for reproducing unique information which specifies a medium vendor and prohibits use by a third party in a control information area of an optical disk, this method reproduces the control information during a start-up period for recording or reproduction after the optical disk is loaded into a drive unit and displays the unique information on a display unit which is connected to the drive unit.

Abstract: An optical disk includes a substrate which is formed with a plurality of grooves, and a recording layer which is provided on the substrate and which is formed of a phase-change material containing Bi, Ge, and Te. Each of the grooves is provided with a header section on which address information of the groove is recorded. The header section is formed by deflecting the grooves in the radial direction. The header sections of the respective grooves are arranged and aligned in the radial direction. Even when the address information of the predetermined groove was failed to be reproduced, the address information of the predetermined groove is specified from the address information of the adjoining groove. Accordingly, an optical disk is provided, which has a larger capacity, which has high reliability, and which is excellent in durability with respect to repeated writing of data information.

Abstract: A method for manufacturing a plane antenna that coats dielectric with conductor and forms a pattern free of the conductor on a surface of the dielectric which is otherwise coated with conductor includes the step of molding the dielectric and the pattern through injection molding using a mold that has the pattern.

Abstract: An optical disk includes a recording region formed on a substrate for recording user data, and a management region formed on the substrate which includes an identification information region for recording disk-specific identification information such as address information (ID), a SYNC code, or an error detection code (EDC). The identification information region in this optical disk has a flat portion (a mirror region) formed by means of sectioning part of a groove or a land in a given step. The disk-specific identification information is recorded on the identification information region inclusive of this mirror region as irreversible record marks. Moreover, a signal of the disk-specific identification information is detected by a laser beam which is servoed on the recording track of this optical disk. Then, a change in the detected signal level of the disk-specific identification information is detected based on a predetermined threshold level.

Abstract: There is provided a reproduction control method for used with a data carrier that includes a read only memory area that has concaves and convexes formed by injection molding, and records information to be reproduced, and a reproduction control layer, layered on the read only memory area, which changes a state through light irradiation, which method includes the steps of determining information which is prohibited from being reproduced among the information, and changing the reproduction control layer, through the light irradiation onto a position on the read only memory area corresponding to the information which is prohibited from being reproduced, from a reproduction permissible state that allows the information to be reproduced to a reproduction prohibition state that prevents the information from being reproduced. Also, the data carrier, its manufacturing method and driving method are provided.

Abstract: A disc-shaped optical record carrier includes a first area having a spiral track extending in a first direction from an inner side on the disc, and a second area having a spiral track extending in a second direction opposite to the first direction, from an outer side on the disc located on the same plane as the first area on the disc, wherein one of the first and second areas is assigned a recordable area and the other is assigned a read only area.

Abstract: A method for manufacturing a plane antenna that coats dielectric with conductor and forms a pattern free of the conductor on a surface of the dielectric which is otherwise coated with conductor includes the step of molding the dielectric and the pattern through injection molding using a mold that has the pattern.

Abstract: An optical disc includes a plurality of lands and grooves alternately arranged in a radial direction of the optical disc, each land wobbling in the radial direction and recording a header recording part for holding address information, there being a difference in elevation between each land and each groove, each grove having a data recording part for storing data, wherein the header recording parts offset alternately for respective lands in the radial direction, the data recording part in the groove and the header recording part in the land are arranged offset in a circumferential direction of the optical disc, and the header recording part in each land enables the same address information to be reproduced for two groove at both sides of each land.

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: An information recording disk having a structure that a ring-shaped recording region is divided into a plurality of concentric, annular blocks, each of the blocks is divided in a circumferential direction into a plurality of equal sectors, and a recording track and a pit train for generating a header signal are previously formed in the recording region so that the recording density of a block increases as the block is nearer to the outer circumference of the recording region, is disclosed in which disk the recording region has a portion where blocks are pre-formatted so that the pit pitch of the header-signal generating pit train formed on the innermost recording track of the outer one of two adjacent blocks is greater than the pit pitch of the header-signal generating pit train formed on the innermost recording track of the inner block.

Abstract: An information recording disk having a structure that a ring-shaped recording region is divided into a plurality of concentric, annular blocks, each of the blocks is divided in a circumferential direction into a plurality of equal sectors, and a recording track and a pit train for generating a header signal are previously formed in the recording region so that the recording density of a block increases as the block is nearer to the outer circumference of the recording region, in comparison with constant angular velocity type, is disclosed in which disk the recording region has a portion where blocks are pre-formatted so that the pit pitch of the header-signal generating pit train formed on the innermost recording track of the outer one of two adjacent blocks is greater than the pit pitch of the header-signal generating pit train formed on the innermost recording track of the inner block.