摘要:
An ion implanter has a sample table on which a sample is placed, and means for injecting ions into the sample by applying an ion beam to the sample on the sample table. The ion implanter has magnetic field applying means for generating radial magnetic fields on the surface of the sample from near the center of the sample to outside of the outer periphery of the sample. The secondary electrons generated when the ion beam irradiates the sample table or the sample, including the secondary electrons generated from the sample table near the outer periphery of the sample, are trapped in the magnetic fields and transferred to the central portion of the sample. The secondary electrons are attracted by the electrostatic charge of the ions injected to the surface of the sample and recombine with the ions. Consequently, the electrostatic charge on the surface of the sample is decreased, preventing generation of device defects caused by electrostatic discharge damage.
摘要:
A circuit board includes an insulating substrate having opposed first and second surfaces and a thickness; and first and second conductive layers disposed on the first and second surfaces of the insulating substrate, respectively, wherein the first conductive layer has an end surface projecting outwardly from the first conductive layer in a direction generally parallel to the first surface of the insulating substrate, and a contact surface in contact with the insulating substrate and joining the end surface at a junction, wherein the end surface is spaced from the first surface of the insulating substrate except at the junction.
摘要:
In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.
摘要:
In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.
摘要:
An object of the invention is to provide a diagnostic method for an oil-filled electrical device that considers a temperature distribution in the oil-filled electrical device and enables accurate diagnosis to be conducted even when the method is applied to diagnosis of an actually operating device, and further provide a method with which such diagnosis of an oil-filled electrical device can be conducted from a component analysis value of an insulating oil in the oil-filled electrical device. The invention is a diagnostic method for an oil-filled electrical device including in an insulating oil a metal part wrapped with insulating paper, and determines that a time when a surface resistivity of a maximum precipitation site where metal sulfide is most precipitated on the insulating paper reaches a preset surface resistivity management value is a time of occurrence of an abnormality.
摘要:
A semiconductor device includes an insulator substrate mounted on a base plate, the insulator substrate having an upper electrode, semiconductor chips mounted on the insulator substrate, external terminals for establishing external electrical connections of the semiconductor device, wires for establishing electrical connections among the external terminals, the upper electrode and the semiconductor chips, a case accommodating the insulator substrate, the semiconductor chips, the external terminals and the wires which are sealed by a sealing material filled in the case, a lid for protecting an upper part of the sealing material, and an insulative low electrification covering fitted on each wire, the low electrification covering having a lesser tendency to produce an electric charge buildup than the sealing material.
摘要:
In an inverter system including of an electric-power converter and an ac rotating machine, over-voltage generated in the ac rotating machine is controlled by a low-cost system configuration. The system includes: an electric-power converter; a three-phase ac rotating machine; and a four-core non-coaxial cable, having a ground line and three-phase electric-power supplying lines, connecting the electric-power converter to the three-phase ac rotating machine. One or two capacitors are connected between the ground line and one or two of the electric-power supplying lines, at electric-power supplying terminals on the rotating machine, so that respective capacitances between the three-phase electric-power supplying lines and the ground line are approximately equal to each other.
摘要:
In an inverter system including of an electric-power converter and an ac rotating machine, over-voltage generated in the ac rotating machine is controlled by a low-cost system configuration. The system includes: an electric-power converter; a three-phase ac rotating machine; and a four-core non-coaxial cable, having a ground line and three-phase electric-power supplying lines, connecting the electric-power converter to the three-phase ac rotating machine. One or two capacitors are connected between the ground line and one or two of the electric-power supplying lines, at electric-power supplying terminals on the rotating machine, so that respective capacitances between the three-phase electric-power supplying lines and the ground line are approximately equal to each other.
摘要:
A semiconductor device includes an insulator substrate mounted on a base plate, the insulator substrate having an upper electrode, semiconductor chips mounted on the insulator substrate, external terminals for establishing external electrical connections of the semiconductor device, wires for establishing electrical connections among the external terminals, the upper electrode and the semiconductor chips, a case accommodating the insulator substrate, the semiconductor chips, the external terminals and the wires which are sealed by a sealing material filled in the case, a lid for protecting an upper part of the sealing material, and an insulative low electrification covering fitted on each wire, the low electrification covering having a lesser tendency to produce an electric charge buildup than the sealing material.
摘要:
In an IGBT module which contains an IGBT device and a diode device connected to each other and accommodated in a case and which radiates heat generated in operation through a radiation board, an object is to reduce the area of the module in the lateral direction to achieve size reduction. The collector electrode surface of an IGBT device is provided on a radiation board, and an element connecting conductor is bonded with conductive resin on the emitter electrode surface. The anode electrode surface of a diode device is bonded on it with the conductive resin. The IGBT device and the diode device are thus stacked and connected in the vertical direction.