摘要:
A semiconductor device in which electrodes of a plurality of semiconductor elements are bonded onto at least one of a plurality of electrode patterns on an insulator substrate, the other surface of the insulator substrate being bonded to a heat dissipating base. The upper surface of the heat dissipating base is covered with a member for cutting off the semiconductor elements from the outer environment. Terminals electrically connect the electrodes on said insulator substrate and the electrode placed outside the cutoff member. The material of the heat dissipating base has a linear expanding coefficient larger than that of the semiconductor element and smaller than three times that of the semiconductor element, and a thermal conductivity larger than 100 W/mK. The semiconductor elements are arranged on at least one electrode surface and in at least two regions divided by the other electrode surface on the insulator substrate.
摘要:
There is provided a soft X-ray shielding structure of a soft X-ray irradiation static eliminating apparatus which irradiates air to be supplied with soft X-rays and ionizes the same, the soft X-ray shielding structure allowing the passing of the ionized air and shielding the soft X-rays and including: an accommodation body having a mesh-like inflow opening and a mesh-like outflow opening and made of a soft X-ray shielding material; and a plurality of massive members filled in the accommodation body and made of a substance shielding electromagnetic waves.
摘要:
A laser machining apparatus in which laser output can be easily corrected in view of secular change of components of the laser machining apparatus and influence of temperature. Output values of a laser oscillator operated according to a reference laser output command value Psc are stored as reference output values P(θ) at different temperatures θ in a table TB1. When the laser oscillator is started up, a measured output value Pr of the laser oscillator supplied with the reference command value Psc is obtained, and a new correction coefficient k is obtained to replace an old one. From a reference output value P(θ) at a temperature at that time and the actual output measured value Pr, a correction value ΔP is obtained and stored. Each time temperature θ is measured, a reference output value (Pθ) at a measured temperature θ is obtained from the table TB1, an estimated output value Pa is obtained by subtracting the correction value ΔP from the reference output value (Pθ), and a new correction coefficient k is obtained to replace an old one. In other words, an output value at a different temperature is estimated on the basis of the correction value ΔP obtained when the laser oscillator is started up, and a new correction coefficient k is obtained to replace an old one. When the temperature reaches a predetermined temperature, a new final correction coefficient k is obtained on the basis of the reference command value and a measured output value to replace an old one.
摘要:
Master node #0 and a plurality of slave nodes #1 to #4 are connected to one another via a plurality of optical couplers 20. Each of the nodes is controlled so that signal transmission between the nodes by a bus connection and a link connection is conducted via the optical couplers. In the link connection, the master node transmits bit signals corresponding to the number of the slave nodes. Each of the slave nodes transmits a bit signal with allocating the signal to a predetermined bit.
摘要:
A wiring board comprising: a plate core having a first main surface and a second main surface; conductor layers including a conductor line; dielectric layers laminated alternately with said conductor layers on at least one of said first and second main surfaces; via conductors as defined herein; a signal through-hole as defined herein; a signal through-hole conductor as defined herein; a first path end pad as defined herein; a second path end pad as defined herein; a shield through-hole as defined herein; and a shield through-hole conductor as defined herein; wherein: a signal transmission path is formed as defined herein; at least one of said conductor layers is disposed on each of said first and second main surface sides; said surface conductor on said first main surface side and said conductor line form a strip line, a microstrip line, or a coplanar waveguide with constant characteristic impedance Z0; an inner surface of said shield through-hole is covered with said shield through-hole conductor; and an interaxis distance between said signal through-hole conductor and said shield through-hole conductor is adjusted as defined herein.
摘要:
An intermediate substrate includes a substrate core formed by a main core body portion constructed of a sheet of polymer material and having a subsidiary core accommodation portion formed therein. A ceramic subsidiary core portion, which is constructed of a ceramic sheet, is accommodated in the subsidiary core accommodation portion and is of a thickness matching that of the main core body portion. A thin film capacitor is formed on a first main surface side of a plate-like base of the core portion and includes first and second thin film electrodes separated from each other by a thin film dielectric layer so as to provide direct current isolation between the electrodes. First and second direct current isolated terminals of a first terminal array are electrically connected to the first and second thin film electrodes.
摘要:
An image forming apparatus includes a box shaped main body and a fixing device that is provided in the main body. The fixing device includes a heating roller that has a length nearly corresponding to the maximum width of paper and a pressure roller that has a substantially same length as the length of the heating roller and comes in contact with the heating roller, and a contact/separation mechanism to bring the pressure roller into contact with or separate from the heating roller. The fixing device can be taken out of the main body by moving it in the direction orthogonal to the long direction of the heating roller and the pressure roller.
摘要:
In the case that the video and audio information obtained from the digital broadcast or a digital recording medium coded according to a predetermined information processing rule is digitally transmitted, the normal reproduction and special reproduction are performed reproducibly as in the case of an analog signal processing equipment. A data reproduction transmission apparatus for reproducing the video and audio information coded according to a predetermined information processing rule provided with a decoding means 2 for decoding the coded data that includes the video and audio information, a data conversion means 3 for converting the digital data obtained from the decoding means 2 to the video and audio information that is acceptable for an analog signal processing equipment, and a data restructuring means 4 for restructuring coded data or decoded digital data that includes at least the video and audio information to the coded data that is acceptable for a digital signal processing equipment.
摘要:
A laser unit capable of suitably updating a correction coefficient for correcting a laser output command for a laser oscillator. Validation of input of an update activation signal for the correction coefficient (F1=1) or waiting is carried out by operation of a display, a keyboard or a switch or by inputting an external signal. Flag F2 indicating automatic running, flag F3 indicating laser beam output and flag F4 indicating a shutter condition are checked. The correction coefficient is set to “1” only when flags F2, F3 and F4 are all equal to zero. Further, a laser output reference command value is outputted and the correction coefficient is updated after a predetermined time. Otherwise, a message indicating a reason for prohibition of update of the correction coefficient is displayed on an indicator, flag F1 is set to zero and the process is terminated.
摘要:
An image forming apparatus according to the present invention includes: a discrimination circuit for detecting a conveying load at a time a sheet, on which an image is to be formed, is conveyed through a curved conveying path, for discriminating a thickness of the sheet based on a detected value of the conveying load, and for generating a process control signal in order to carry out a process control suitable for the thickness of the sheet based on the discriminated thickness; and a process control circuit for carrying out the process control suitable for the thickness of the sheet in response to the process control signal received.