摘要:
A semiconductor memory includes a random access memory (RAM) and a serial access memory (SAM). The RAM includes a memory cell array including memory cells. The SAM includes a data register including a plurality of bit cells which store bits of data read out from the memory cell array and assigned consecutive numbers, a first data bus line which is connected to odd numbered bit cells of the data register, a second data bus line which is connected to even numbered bit cells of the data register, a switching circuit for outputting serial data from the data register by alternately connecting to one of the first and second data bus lines, a first reset circuit for resetting the first data bus line when active, a second reset circuit for resetting the second data bus line when active, and a control circuit for selectively making the first and second reset circuits active so that a data transfer period of one of the first and second data bus lines starts prior to an end of a data transfer period of the other of the first and second data bus lines.
摘要:
Nickel paste includes nickel powder, a resin binder and an organic solvent, wherein the nickel powder includes less than 100 ppm sulfur. This provides the nickel paste that the change in viscosity due to sulfur included in the paste can be preferably restrained by using nickel powder including extremely small amount of sulfur. Limitation of sulfur to the extremely small amount causes superior stability, and then, since kinds of solvents and resin binders are not limited, the change in viscosity can be preferably restrained with using the solvent that is hard to cause the chemical attack on the green sheet as described above. Thus, nickel paste that is hard to cause the chemical attack and the change in viscosity can be provided.
摘要:
A laser machining apparatus includes a laser generator for generating a laser beam and a driver unit for moving the laser beam relatively with respect to a workpiece as to emit the laser beam on the workpiece. The laser beam includes plural laser pulses. The laser pulses have spots each having a longitudinal direction. The driver unit moves the laser beam in the longitudinal direction relatively with respect to the workpiece so that the spots overlap each other. This laser machining apparatus can process the workpiece at high quality and high productivity.
摘要:
The deposit conveyance mechanism is capable of effectively conveying deposits. The mechanism comprises: a conveying tube 10 having a suction port 12, a vertical tube part 13, a horizontal tube part 14 horizontally extending sideward, the horizontal tube part 14 being held in the water so as to locate below a hydraulic gradient line and vertically moved so as to move the suction port 12 close to and away from the bottom face of the water storing place, by an elevating unit 38, in a prescribed cycle; a cup-shaped member 60 provided to the suction port 12 of the conveying tube 10, the cup-shaped member having a lower part in which the suction port 12 is capable of moving upward and downward; a steam supplying section 73 supplying steam into the cup-shaped member 60; and a compressed gas supplying section 74 supplying a compressed gas into the cup-shaped member 60.
摘要:
In the laser beam machining apparatus, an optical sensor provided with a blue filter detects change of color of light emission from the machining spot on a workpiece irradiated by a machining laser beam from orange color light emission to blue color light emission, when laser beam intensity per area becomes above a certain level as a result of good focusing by a condenser lens; and the position of the condenser lens is controlled based on output of the optical sensor, in a manner that the optical lens lies in such a positional range that the blue color is emitted from machining spot.
摘要:
A hot rolled steel sheet cooling apparatus includes a gradual cooling header 2 including a rod-like cooling water nozzle 3 for gradual cooling and a rapid cooling header 4 including a rod-like cooling water nozzle 5 for rapid cooling such that the headers constitute a cooling unit 9. The cooling unit 9 includes an elevating unit 7 capable of moving upward and downward in unison with the cooling unit. In cooling the upper surface of a hot rolled steel sheet (hot rolled steel strip or steel plate), uniform and stable cooling is achieved while both of high cooling rate and low cooling rate are ensured.
摘要:
A rotor oscillation preventing structure for a steam turbine includes: a stator vane 3; a moving blade 1; a shroud cover 2 installed on an outer circumferential side distal end of the moving blade 1; and a plurality of seal fins 6 installed, at any interval in the axial direction of a rotor, on an wall surface of a stationary body located on an outer circumferential side of the shroud cover 2, a whirl preventing structure comprised of whirl preventing plates 9 or whirl preventing grooves 11 is provided at a shroud cover inlet return portion 10 of the shroud cover 2 so as to block the whirl flow of leakage flow 8 on an upstream side in an operating steam flow direction of the seal fins to reduce an absolute velocity component of the leakage flow 8 in a rotational direction of the rotor.
摘要:
A composition for removing side wall which includes an aqueous solution containing both nitric acid and at least one of carboxylic acids selected from the group consisting of polycarboxylic acid, aminocarboxylic acid, and salts thereof; a method of removing side wall; and a process for producing a semiconductor device. Use of the composition is effective in removing side wall at a low temperature in a short time in semiconductor device production without corroding the wiring material, e.g., an aluminium alloy. Thus, a semiconductor device having an aluminium alloy wiring which has undergone substantially no corrosion can be efficiently produced.
摘要:
In a high velocity gas laser oscillator of radio frequency or microwave exciting type, both end parts of the discharge tube are provided with gas flow rectifiers for making an inward flowing whirlwind at the discharge region of the discharge tube by blowing the discharge gas through plural slits located in a plane disposed at a predetermined angle with respect to a plane including axis of the discharge tube, wherein microwave power is applied to the discharge tube so as to define an annular discharge region in the discharge tube.
摘要:
A powder coating is provided, comprising a particulate material having a particle diameter satisfying the following requirements:(a) the volume 50% diameter be from 7 to 15 .mu.m;(b) the proportion by volume of the particles having a particle diameter of not less than 20 .mu.m and those having a particle diameter of not less than 30 .mu.m in the particulate material be not more than 10% and 0%, respectively; and(c) the proportion by population of the particles having a particle diameter of not more than 5 .mu.m in the particulate material be not more than 50%, the particulate material having an external additive attached to the surface thereof, the percent coverage by the external additive determined by the following equation described in the specification being from 30 to 100%. The powder coating can provide a film having a reduced thickness with an improved leveling and hence make it possible to improve the working efficiency and re-use the fractions of the powder coating recycled from the coating process, realizing the reduction of the total cost.