摘要:
A crimp-type semiconductor device having a non-alloy structure according to this invention has a silicon pellet including a plurality of cathode electrodes and a plurality of gate electrodes arranged to be alternately staggered with the cathode electrodes at the cathode side, and an anode electrode at the anode side. The cathode electrodes are crimped by a cathode electrode post via an electrode member constituted by a thin soft-metal plate and a hard metal plate. The anode electrode is crimped by an anode electrode post via an electrode member. Opposing surfaces of the electrodes, the electrode members, and the electrode posts are not bonded to but crimped in contact with each other. The electrode members are formed to cover the entire surfaces of the cathode electrode and the anode electrode, respectively, and the entire surface of the cathode electrode post and the anode electrode post, respectively. The electrode members and the electrode posts are positioned with respect to each other by positioning guides, respectively.
摘要:
A press-contact flat type semiconductor device is disclosed which, without alloy-bonding a silicon pellet to a molybdenum or tungsten disc, assures a uniform press contact because a warp on the silicon pellet is largely reduced in comparison with a conventional device. A silver sheet is omitted between an anode electrode post and the silicon pellet to absorb a warp on the pellet. It is only necessary to insert a molybdenum or tungsten disc there, instead, which is thinner than a counterpart of the conventional device. Between the cathode electrode of the silicon pellet and a cathode electrode post use is made of, in the place of a conventional molybdenum foil and silver cap, an annealed soft copper cap of better malleability and, in the place of conventional molybdenum disc, an inexpensive hard copper sheet of adequate thickness and rigidity, not annealed, which can assure uniform press contact with the cathode electrode surface which oppositely confronts a gate lead connection circuit of a cathode electrode post. Since the silicon pellet is not alloy-bonded to the molybdenum or tungsten disc, it is simple and easy to form a bevelled structure, and to perform a silicone insulating rubber coating operation, so as to obtain the anode-to-cathode withstand voltage of the silicon pellet. Thus an inexpensive press-contact flat type semiconductor device of a long life can be provided which ensures more uniform press contact than a conventional semiconductor device.
摘要:
A belt conveyor transportation system includes a plurality of belt conveyor units each having an endless belt whose main constituent element consists of a magnetic material so as to be magnetically attractive with magnets, and the conveyor units are continuously arranged lengthwise along a desired transportation network layout to form a conveyor line. The conveyor units of the conveyor line drive their magnetic belts separately or in groups each including a number of the units at an independent speed. A moving body or bodies are arranged to move along the conveyor line, and the moving member includes a magnet system. By virtue of the magnetic attraction between the conveyor units and the magnet system, the moving member travels along the conveyor line while being hauled by the magnetic belts of the conveyor units at their respective speeds.
摘要:
A belt conveyor transportation system includes a plurality of belt conveyor units each having an endless belt whose main constituent element consists of a magnetic material so as to be magnetically attractive with magnets, and the conveyor units are continuously arranged lengthwise along a desired transportation network layout to form a conveyor line. The conveyor units of the conveyor line drive their magnetic belts separately or in groups each including a number of the units at an independent speed. A moving body or bodies are arranged to move along the conveyor line, and the moving member includes a magnet system. By virtue of the magnetic attraction between the conveyor units and the magnet system, the moving member travels along the conveyor line while being hauled by the magnetic belts of the conveyor units at their respective speeds.
摘要:
A control system for automatic operation of travelling objects through a power supply system without using any signal communication systems. Either a DC power source or three-phase AC power source is utilized as a power source. With the system employing a DC power source, three trolley wires are installed, one a negative and two positive. Each of the positive wires is divided and insulated into sections of a predetermined length; the positive feeding trolley wires in each section is always supplied with the DC power, and the power to the other positive feeding trolley wire is switched on and off depending on the movement of travelling objects. Each travelling object is supplied with power by the three trolley wires has a DC motor, and when one of the positive wires has no voltage, this is detected and the braking is effected. The travelling object entering a station is automatically decelerated and stopped. When employing a three-phase AC power source, four trolley wires are installed, of which one is a neutral trolley wire and the remaining three trolley wires are with phases of AC power. Each of these three AC feeding trolley wires is divided and insulated into sections of a predetermined length, one of the three trolley wires is always supplied with the phase power, and power to the other two is switched on and off responsive to movement of the travelling objects, which travelling objects are equipped with an induction motor having star connected field coils and as power to the two AC feeding trolley wires is switched off, the unbalance current in the field coil flows to the neutral trolley wire causing braking.
摘要:
An object of the present invention is to provide an air conditioner and a controlling method thereof capable of effectively conditioning air in an operator cab of a vehicle even if a windshield or door of the operator cab is opened. The air conditioner comprises: a heating unit for heating an upper half of an operator's body; an open/close sensor for detecting opening and closing of the operator cab; and a controller for setting a heating power of the heating unit when the open/close sensor detects that the operator cab is opened, to be higher than the heating power of the heating unit when the operator cab is closed.
摘要:
Disclosed is fluorocarbon-based dry etching gas which is free of global environmental problems and a dry etching method using a plasma gas obtained therefrom. The dry etching gas includes a fluorinated ether of carbon, fluorine, hydrogen and oxygen and having 2-6 carbon atoms.
摘要:
A belt conveyor transportation system includes a plurality of belt conveyor units each having an endless belt whose main constituent element consists of a magnetic material so as to be magnetically attractive with magnets, and the conveyor units are continuously arranged lengthwise along a desired transportation network layout to form a conveyor line. The conveyor units of the conveyor line drive their magnetic belts separately or in groups each including a number of the units at an independent speed. A moving body or bodies are arranged to move along the conveyor line, and the moving member includes a magnet system. By virtue of the magnetic attraction between the conveyor units and the magnet system, the moving member travels along the conveyor line while being hauled by the magnetic belts of the conveyor units at their respective speeds.
摘要:
An electric power supplying system for a continuous transit system by magnet (CTM) in which magnets attached to under parts of a certain number of cars comprising the trains and energized regularly are attracted to magnetic belts of a plurality of magnetic belt conveyor units arranged at predetermined intervals along a running track thereby successively drawing and running the trains. There is provided a trolley wire which is divided at least into a certain number of insulated sections at intervals of a predetermined block section length and a predetermined no-load current is supplied to the insulated sections of the trolley wire. When the current flowing to each insulated section of the trolley wire is within a predetermined range, the magnetic belt conveyor unit group corresponding to a block section following the insulated section with respect to the direction of train movement is operated.
摘要:
A press pack semiconductor device comprising a semiconductor element having a mesa formed on a main surface thereof, first, second and third electrodes, a supporting plate fixed to the third electrode, a first intermediate plate which is movably attached to the surface of the first electrode and which is thin, a first disc and a second disc respectively electrically connected through the first intermediate plate to the first electrode and through the supporting plate to the third electrode and a housing surrounding the semiconductor element. The first intermediate plate protects the semiconductor element from being subjected to great stress.