Patent application number | Description | Published |
20090207523 | MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING APPARATUS - A magnetic recording medium formed on a substrate. The magnetic recording medium includes a data region including a plurality of magnetic dots arranged at predetermined positions on the substrate, for recording information; and a servo region for specifying the positions of the magnetic dots, the servo region including a plurality of magnetic segments arranged at predetermined positions on the substrate, each of the magnetic segments being smaller than each of the magnetic dots. | 08-20-2009 |
20090237829 | INFORMATION RECORDING MEDIUM - An information recording medium has a substrate, first recording dots, and second recording dots. The first recording dots are arranged in an array circumferentially in accordance with a predetermined regulation at mutual intervals in accordance with the regulation at a position in accordance with the regulation, and are used to magnetically record information. The second recording dots are arranged in an array circumferentially in accordance with the regulation at mutual intervals in accordance with the regulation. In the second recording dots, plural kinds of positions having different deviation amounts from the position in accordance with the regulation appear in one round of the array. The second recording dots are also used to magnetically record information. | 09-24-2009 |
20100103554 | MEDIA ACCESS METHOD AND MAGNETIC STORAGE APPARATUS - According to one embodiment, a media access method includes a head scanning each track of a magnetic recording medium while tilting with respect to a direction perpendicular to the track direction at all positions including a position with a skew angle of zero on the magnetic recording medium. The track includes at least one magnetic dot array. The core width of the head is set with respect to a pitch of magnetic dots in the track direction and a pitch in the direction perpendicular to the track direction so that the head does not simultaneously scan a plurality of magnetic dots while scanning one track. | 04-29-2010 |
20100123973 | INFORMATION STORAGE MEDIUM AND INFORMATION STORAGE APPARATUS - According to one embodiment, an information storage medium includes a plurality of sectors arranged in a circumferential direction of a disk-shaped substrate, each sector having a servo pattern that is formed on the substrate and in which information indicating a position in a radial direction of the substrate is magnetically recorded, and a plurality of recording dots that is arranged with a predetermined pitch in the circumferential direction of the substrate and in which information is to be magnetically recorded. The servo pattern has a magnetic pattern arranged in the circumferential direction with a pitch having a predetermined integral ratio to the pitch of the recording dots. A recording dot arranged nearest to the servo pattern among the recording dots in each sector is arranged at a position having a constant phase relationship to the pitch of the servo pattern of the sector comprising the recording dots in any of the sectors. | 05-20-2010 |
Patent application number | Description | Published |
20080240717 | Optical transmitter/receiver module - Efficient absorption of radio wave emission can be ensured from a high frequency signal processing circuit in an optical transmitter/receiver module. The optical transmitter/receiver module pluggable to a communication device includes a housing having openings on an anterior and a posterior ends; an optical connector disposed at the anterior opening; a photoelectric converting unit that converts a wavelength-division multiplexed optical signal, that is input from an optical transmission line connected to the optical connector, into an electric signal; and a high frequency circuit board that performs high frequency signal processing of an electric signal converted by the photoelectric converting unit, whereinat the posterior opening, a connecting terminal of the high frequency circuit board is formed so that it is pluggable to a mother board of a communication device, and wherein radio wave absorbers are arranged in spaces between the top/bottom surfaces of the high frequency circuit board and the housing. | 10-02-2008 |
20080304157 | Chromatic dispersion compensation device and method - A chromatic dispersion compensator whereby the amount of dispersion and the group delay time can be easily adjusted. A dispersion unit, a transmitting lens and a group delay generation unit are arranged along the optical axis of incident light. The dispersion unit separates the incident light into beams of respective different wavelengths. The transmitting lens is arranged across the optical paths of the beams of different wavelengths separated by the dispersion unit, and refracts the beams at different angles according to their respective incidence positions. The group delay generation unit is arranged across the optical paths of the beams of different wavelengths refracted by the transmitting lens, causes the beams to undergo propagation delay for periods corresponding to their respective incidence positions, and converges and emits the beams of different wavelengths. Consequently, the beams of different wavelengths are imparted group delay corresponding to the refracting angles of the transmitting lens. | 12-11-2008 |
20090317085 | Optical module and dispersion compensator - In an optical module, a lens collects input light to generate a collected beam. A VIPA plate includes a reflective surface for highly reflecting light and a transmissive surface on which a reflection film having a lower reflectivity than the reflective surface is deposited. The VIPA plate causes multiple reflection of the collected beam within an internal area between the reflective surface and the transmissive surface, and emits diffracted light via the transmissive surface. A reflection mirror reflects outgoing light emitted from the transmissive surface to generate return light which returns to the transmissive surface. The reflection film includes a high-reflection film deposited on a portion from which the outgoing light of a high light intensity is emitted and a low-reflection film deposited on a portion from which the outgoing light having a lower light intensity is emitted. | 12-24-2009 |
20110158640 | Chirp measuring device and chirp measurement method - A chirp measuring device includes a chirp measuring unit that measures chirps indicating a time variation of an optical frequency of input light signal; a signal averaging unit that computes, based on a predetermined number of additions for signal averaging, an average of the chirps measured by the chirp measuring unit; a chirp threshold value determining unit that determines whether the average computed by the signal averaging unit is not less than a predetermined chirp threshold value; and a determination result output unit that outputs a determination result obtained by the chirp threshold value determining unit. | 06-30-2011 |
Patent application number | Description | Published |
20080197391 | Semiconductor device and method of manufacturing the same - A semiconductor device has a ferroelectric capacitor having a ferroelectric film, an interlayer insulating film having a first layer formed on the ferroelectric capacitor, a plug and a wiring connecting to the ferroelectric capacitor, and a dummy plug in the vicinity of the ferroelectric capacitor. | 08-21-2008 |
20090160023 | Semiconductor device and manufacturing method thereof - An insulation film ( | 06-25-2009 |
20100184240 | SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME - Disclosed is a method of manufacturing a semiconductor device, which comprises the steps of: forming a hydrogen diffusion preventing insulating film covering capacitors; forming a capacitor protecting insulating film on the hydrogen diffusion preventing insulating film; and forming a first insulating film on the capacitor protecting insulating film by a plasma CVD method where, while a high-frequency bias electric power is applied toward the semiconductor substrate, a plasma-generating high frequency electric power is applied to first deposition gas containing oxygen and silicon compound gas. In the method, a condition by which moisture content in the capacitor protecting insulating film becomes less than that in the first insulating film is adopted as a film deposition condition for the capacitor protecting insulating film. | 07-22-2010 |
20100261294 | MANUFACTURING METHOD OF SEMICONDUCTOR DEVICE - After a first via hole leading to a ferroelectric capacitor structure are formed in an interlayer insulating film by dry etching, a second via hole to expose part of the ferroelectric capacitor structure is formed in a hydrogen diffusion preventing film so as to be aligned with the first via hole by wet etching, and a via hole constructed by the first via hole and the second via hole communicating with each other is formed. | 10-14-2010 |
20100261296 | SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF - A semiconductor device is disclosed. The semiconductor device includes a ferroelectric capacitor formed on a substrate and a wiring structure formed on the ferroelectric capacitor. The wiring structure includes a dielectric inter layer and a Cu wiring section formed in the dielectric inter layer. In addition, an etching stopper layer including a hydrogen diffusion preventing layer is formed so as to face the dielectric inter layer. | 10-14-2010 |
20110012230 | SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF - An insulation film ( | 01-20-2011 |