摘要:
A multi-time rewritable information recording medium conducting writing by the change of arrangement of atoms under the irradiation of light, comprising, from the light-incident side, a substrate of a thickness of 0.7 mm or less, a lower protective layer of a thickness of 20 nm to 60 nm, a recording film, an upper protective layer, and a reflective layer, wherein the interval between tracks is 0.62 &mgr;m or less. The medium can also possess favorable writing/reading characteristics at high density writing/reading, have large processing margin, use a manufacturing apparatus at a reduced cost, cut material cost, and realize mass productivity with less stresses.
摘要:
The object is to hold the recording, reproduction and rewrite characteristics better than in the prior art. An information recording medium comprises an information recording thin film as a recording layer formed on a substrate for recording and/or reproducing information by the change in the atomic arrangement caused by the radiation of light. The medium further comprises at least one protective layer. The protective layer and the recording layer are formed in that order from the light incidence side, followed by forming at least one absorption control layer, thereby exhibiting a superior rewrite characteristic.
摘要:
Optimum edge recording methods are previously held in a control data zone on the recording medium, and one of the methods is selected in a write mode by referring to the recorded methods. An information recording apparatus for forming a recording mark by converting an energy beam to a multi-pulsed train and irradiating the beam onto the recording medium includes that change-over can be realized between mark edge control based on control of both pulse edge positions and mark edge control based on control of one of the pulse edge positions.
摘要:
A masking type light control layer for decreasing its reflection factor in a high-temperature region is formed on phase pits of an optical disc, and the phase pit depth is set to a predetermined value. A light spot for reproduction is shaped to an elliptical form and two sub-flux beams on the optical disc are spaced by 5/4 track pitch from a principal flux beam in the radial direction of the optical disc. The kind of optical disc is discriminated and reproduction laser power and characteristics of an equalizer circuit are switched in accordance with the type of an optical disc. Through this, a stable servo signal detection can be ensured and repetitive reproduction characteristics can be improved.
摘要:
A phase change optical disk in which the thermal conductivity of a first region at an outer peripheral position of the disk is set at a value larger than the minimum value of that of a second region. In the optical disk, in order to provide an output characteristic of a uniform reproduced signal when the disk is rotated at a fixed rotation speed, toward an outer peripheral position thereof, the critical cooling rate of a recording film is set at a larger value or the temperature which the recording film is to reach is set at a lower value. Provided is a method of using the phase change optical disk for recording or erasing information, in which method, the power of the laser beam to be directed to an inner peripheral position of the disk is set larger than that directed to an outer peripheral position thereof.
摘要:
[Problem] There are provided a thermal recording head capable of making proper operation of a converter, and a thermal recording apparatus including the same.[Solution] A thermal recording head (10) of the invention is driven on a basis of a first control signal and includes a head substrate (20) including heat generating elements (23a), a wiring substrate (30) including, on its surface, a wiring pattern (312) for transmission of the first control signal, and a mount substrate (40) disposed facing a back surface of the head substrate (20) and a back surface of the wiring substrate (30) and configured to mount the head substrate (20) and the wiring substrate (30). On the surface of the head substrate (20) is placed a control element (27) electrically connected to the heat generating elements (23a) and configured to control driving of the heat generating elements (23a). On the surface of the wiring substrate (30) is placed a converter (323) electrically connected to the wiring pattern (312) and configured to convert the first control signal into a second control signal. The mount substrate (41) is spaced away from a corresponding region at the back surface of the wiring substrate (30) that corresponds to a fourth placement area (40d) bearing the converter (323) on the surface of the wiring substrate (30).
摘要:
An electrical discharge machine that performs electrical discharge machining on a workpiece by supplying a machining fluid to a machining gap between a machining electrode and the workpiece, the electrical discharge machine including: an air-bubble generation unit that generates air bubbles in the machining fluid; a storage unit that stores therein the machining fluid containing the air bubbles generated by the air-bubble generation unit; and a flow-rate adjustment unit that adjusts a flow rate of the machining fluid that flows in the storage unit, wherein the flow-rate adjustment unit adjusts the flow rate according to a diameter of the air bubbles contained in the machining fluid to be supplied to a machining tank in which the workpiece is placed.
摘要:
[Problem] There are provided a thermal recording head capable of making proper operation of a converter, and a thermal recording apparatus including the same. [Solution] A thermal recording head (10) of the invention is driven on a basis of a first control signal and includes a head substrate (20) including heat generating elements (23a), a wiring substrate (30) including, on its surface, a wiring pattern (312) for transmission of the first control signal, and a mount substrate (40) disposed facing a back surface of the head substrate (20) and a back surface of the wiring substrate (30) and configured to mount the head substrate (20) and the wiring substrate (30). On the surface of the head substrate (20) is placed a control element (27) electrically connected to the heat generating elements (23a) and configured to control driving of the heat generating elements (23a). On the surface of the wiring substrate (30) is placed a converter (323) electrically connected to the wiring pattern (312) and configured to convert the first control signal into a second control signal. The mount substrate (41) is spaced away from a corresponding region at the back surface of the wiring substrate (30) that corresponds to a fourth placement area (40d) bearing the converter (323) on the surface of the wiring substrate (30).
摘要:
The present invention provides a bifunctional phenylene ether oligomer compound having a thermosetting functional group at each terminal, an epoxy resin containing the above oligomer compound and a use thereof. That is, it provides a sealing epoxy resin composition for sealing an electric part, an epoxy resin composition for laminates, a laminate, a printed wiring board, a curable resin composition and a photosensitive resin composition. The resins and resin compositions of the present invention are used in electronics fields in which a low dielectric constant, a low dielectric loss tangent and high toughness are required and also used for various uses such as coating, bonding and molding.
摘要:
The present invention provides a bifunctional phenylene ether oligomer compound having a thermosetting functional group at each terminal, an epoxy resin containing the above oligomer compound and a use thereof. That is, it provides a sealing epoxy resin composition for sealing an electric part, an epoxy resin composition for laminates, a laminate, a printed wiring board, a curable resin composition and a photosensitive resin composition. The resins and resin compositions of the present invention are used in electronics fields in which a low dielectric constant, a low dielectric loss tangent and high toughness are required and also used for various uses such as coating, bonding and molding.