摘要:
A wiring board having an insulating substrate of aluminum oxide ceramics and a surface wiring layer formed on the surface of said insulating substrate, wherein the aluminum oxide ceramics constituting said insulating substrate contains a manganese compound in an amount of from 2.0 to 10.0% by weight in terms of MnO2, and has a relative density of not smaller than 95%, and said surface wiring layer contains copper in an amount of from 10 to 70% by volume and at least one high-melting metal selected from the group consisting of tungsten and molybdenum in an amount of from 30 to 90% by volume, and further contains copper as a matrix, said copper matrix having a diffusion structure in which are diffused the particles of said high-melting metal having an average particle diameter of from 1 to 10 &mgr;m. The wiring board is prepared by co-firing the conducting paste for forming the surface wiring layer and the green sheet for forming the insulating substrate, and exhibits excellent heat conductivity and electric properties, and is particularly effectively used for the semiconductor devices that execute arithmetic operations at high speeds.
摘要:
A digital signal transmission system having monitor equipment including a serial/parallel (S/P) converter and a parallel/serial (P/S) converter both. The S/P converter is checked by the aid of a first monitor signal generating circuit that parallel distributes a pass pattern signal given at the input side of the S/P converter to respective individual channel lines for achieving a pass pattern check. The P/S converter is checked with the aid of a second monitor signal generating circuit that receives respective pass pattern signals given, at the input side of the P/S converter, to a multiplexed channel line sequentially at every frame to achieve a pass pattern check.
摘要:
An image data reading apparatus includes a photoelectric conversion device for converting image data on an original into electric signals, a light source for illuminating the original, a detector for detecting the shading correction values for the light source and the photoelectric conversion device, and an image processor for effecting shading correction on the video data output from the photoelectric conversion device with the shading correction value detected by the correction value detector.
摘要:
An alternator rotor has a rotor shaft formed integrally on the center of a rotary magnetic pole assembly having a field coil wound thereon. The rotor shaft has an axial hole formed in one end surface thereof such as to extend axially inwardly and to receive a slip ring supporting shaft. The alternator rotor further has a slip ring assembly, including a couple of slip rings, conductor wires leading from the slip rings, respectively, and the slip ring supporting shaft, which are formed in one body by molding with an insulating material. The slip ring assembly is fixed to the rotor shaft, with the slip ring supporting shaft press-fitted in the axial hole of the rotor shaft.
摘要:
.alpha.-(S)-amino acid..alpha.-phenylethanesulfonate compounds and methods of optical resolution of .alpha.-amino acids and .alpha.-phenylethanesulfonic acids are described.
摘要:
The present invention relates to the optical resolution of a p-hydroxyphenylglycine salt with simultaneous racemization of the undesired enantiomer thereof. The invention is carried out by preferential crystallizing out the desired enantiomer from a supersaturated solution of the racemic modification thereof in a lower aliphatic acid in the presence of an aliphatic or aromatic aldehyde.
摘要:
A control device which controls a plurality of controlled devices by time shared control in a microprogram control system and has one control memory, a plurality of microinstruction registers, the outputs of which are applied to the controlled devices, circuits for memorizing microinstruction execution requests corresponding to microinstruction type and the controlled devices, and a selecting circuit for selecting a microinstruction register for storing a microinstruction read out from said control memory in each machine cycle and the controlled devices to be controlled. The field of the microinstruction indicates the execution and type of the next microinstruction after the next machine cycle to a given controlled device. When the execution of the next microinstruction is indicated, this request and the microinstruction type are memorized by microinstruction request holding circuits corresponding to the controlled circuits respectively and any selected controlled circuit, and the microinstruction is read out of the control memory. Consequently, the instruction stored in one microinstruction register may control one controlled circuit while other instructions stored in the other microinstruction registers may control the other controlled circuits in time-shared parallel relationship.