摘要:
An LSI mounting substrate having a multilayered thin film wiring portion, with the thin film wiring portion being divided into wiring units each composed of a plurality of wiring layers, with the wirings between the units being electrically connected through connecting pads defined in the same surface as that of a surface conductive layer of the unit.
摘要:
A method for generating X-rays in an X-ray tube, comprises the steps of: rotating an X-ray target of a rotating anode, the X-ray target having a metal coated layer thereon; applying electron beams emitted from a cathode onto the metal coated layer of the X-ray target; and offsetting thermal deformation of the X-ray target due to the application of the electron beams by deformation of the X-ray target due to centrifugal force, thereby maintaining a position of the X-ray target in a direction of the application of the electron beams, at a room temperature of the X-ray target, thus generating the X-rays.
摘要:
In an integrated pressure sensor, a silicon chip for pressure detection and a substrate for supporting the silicon chip are made of the same material, the silicon chip has a thin diaphragm portion and a peripheral fixed portion thicker than the diaphragm portion, and the silicon chip is bonded to the substrate through a thin insulating film.
摘要:
A semiconductor pressure transducer assembly comprising a silicon diaphragm assembly and a glass covering member. The silicon diaphragm assembly has a circular diaphragm portion of thin silicon which is formed using etching, and a thick supporting portion therearound. Piezoresistive elements of a piezoresistive bridge circuit and conducting paths for electrically connection thereof are formed on the silicon diaphragm assembly. On a surface of the silicon diaphragm assembly, a passivating layer of silicon dioxide are formed in uniform thickness, and further on a surface of the passivating layer is formed a layer of polysilicon on the supporting portion of the silicon diaphragm assembly. In the passivating layer, a contacting window is formed, through which the polysilicon layer is electrically connected to the silicon diaphragm assembly. The covering member of borosilicate glass having a circular well is mounted and bonded onto the silicon diaphragm assembly in contact with the polysilicon layer using Anodic Bonding method. And the processed silicon diaphragm assembly has a flat surface thereof, on which the piezoresistive elements and the conducting paths are constructed using Ion Implantation method, or reforming a silicon dioxide layer thereon after removing another silicon dioxide layer used as mask in diffusing process.
摘要:
A semiconductor pressure transducer comprising a disc-shaped pressure-responsive diaphragm; a pair of radial strain gauge units having a piezoresistance effect, formed by injecting an impurity in the radial direction in the surface of the diaphragm; and a pair of tangential strain gauge units having a piezoresistance effect, formed by injecting an impurity in the tangential direction in the surface of the diaphragm, wherein the distance from the pair of the radial strain gauge units to the center of the circular diaphragm is greater than the distance from the pair of the tangential strain gauge units to the center of the circular diaphragm.
摘要:
A semiconductor module has a plurality of power semiconductor devices mounted on a substrate, and a metal foil for wiring is mounted on the substrate so that an asymmetric unit arrangement of the semiconductor devices is formed. In the device, all of the units are arranged in the same direction on the substrate, and all of the units are electrically connected with electrode terminal feet, and the electrode terminal feet are electrically connected with linkage terminal foot. The electrode terminal feet are disposed with a certain interval.
摘要:
A power semiconductor module comprising a power semiconductor element included in a power circuit portion and mounted on a metal base, a first resin molded to the power semiconductor element, a control circuit element disposed on the first resin and included at least in a portion of the control circuit, and a control terminal connected to the power circuit portion and having an exposed portion thereof in the surface of the first resin, in which a portion of the control circuit is connected with the power circuit portion at the exposed portion of the control terminal. Accordingly, a resin mold type power semiconductor module capable of realizing a high performance of the control circuit portion at low cost can be realized.
摘要:
A semiconductor device in which a plurality of semiconductor elements are bonded onto at least one electrode pattern on an insulator substrate formed a plurality of electrode patterns on the main surface, each of the electrodes of the semiconductor element being electrically connected to the electrode pattern, the other surface of the insulator substrate being bonded to a heat dissipating base, the upper surface of the heat dissipating base being covered with a member for cutting off the semiconductor elements from the outer environment, terminals electrically connecting the electrodes on said insulator substrate and the electrode placed outside the cutoff member being provided, wherein the material of the heat dissipating base has a linear expanding coefficient larger than the linear expansion coefficient of the semiconductor element and smaller than three times of the linear expansion coefficient of the semiconductor element, and a thermal conductivity larger than 100 W/mK, the semiconductor elements being arranged on at least one electrode surface and in at least two regions divided by the other electrode surface on the insulator substrate.
摘要翻译:一种半导体器件,其中多个半导体元件被结合到绝缘体衬底上的至少一个电极图案上,所述绝缘体衬底在主表面上形成多个电极图案,所述半导体元件的每个电极电连接到所述电极图案, 绝缘体基板的另一表面被结合到散热基底上,散热基座的上表面覆盖有用于从外部环境切断半导体元件的构件,将绝缘体基板上的电极与电极电连接的端子 设置在切断部件外侧,散热基体的材料的线膨胀系数大于半导体元件的线膨胀系数,小于半导体元件的线膨胀系数的3倍,导热系数 大于100 W / mK,半音 电感元件布置在至少一个电极表面上,并且在至少两个区域中被绝缘体基底上的另一个电极表面分隔。
摘要:
A power semiconductor module having a power circuit unit; a metal base for sealing the bottom of the module; an insulation substrate for electrically insulating the metal base from the power circuit unit; external input and output terminals connected to the power circuit unit; a resin case in which the external input and output terminals are inserted by integral molding; and a resin encapsulant material has been improved substantially in its reliability through provision of a nut integrally molded with the resin case for fastening the external input and output terminals with a screw; a metal base inserted in the resin case by integral molding; and a recess to receive the end of the screw located immediately below the nut, the recess extending without penetrating the resin case, and the metal base extending to an area below the recess.
摘要:
Noise generated at high frequencies at the time of simultaneous switchings of logical circuits is reduced by lowering an inductance from LSI to a capacitor formed on a substrate. The capacitor is formed to ensure that an inductance from a bonding pad for the LSI loaded on the substrate to an electrode of the capacitor is 0.05 nanohenry. The lower inductance from the LSI to the capacitor allows a reduction in the amount of the noise at high frequencies among those generated in power supply system, whereby the rising time of signals is made shorter, and the speed of arithmetic operation can be increased.