摘要:
A process for controlling an oxygen content of a non-superconductive or superconductive oxide is provided, in which a beam of particles such as ions, electrons or neutrons or an electromagnetic radiation is applied to the non-superconductive or superconductive oxide of a perovskite type such as YBa₂Cu₃O 7-x , thereby increasing or reducing the oxygen content of the oxide at the sites of oxygen in the crystal lattice of the oxide. Furthermore, a superconductive device such as a superconductive magnet, superconductive power transmission wire, superconductive transformer, superconductive shield, permanent current switch and electronic element is made by utilizing the process for controlling the oxygen concentration of the superconductive oxide.
摘要:
A method of fabricating a semiconductor device includes the steps of: forming at least one first semiconductor region (51) of a first conductivity type and at least one second semiconductor region (50) of a second conductivity type in a main surface of a semiconductor layer of the first conductivity type; forming a three-layer film having a desired shape on each of the first and second semiconductor regions, the three-layer film being made up of a bottom layer which is a conductive film (56), an intermediate layer which is a silicon nitride film (57), and a top layer which is a polycrystalline silicon film (58) doped with one of arsenic and phosphorus; forming a first insulating layer (61) on the side wall of the three-layer film; forming a second polycrystalline silicon film (62) on the whole surface, and diffusing one of arsenic and phosphorus from the first polycrystalline silicon film (58) into the second polycrystalline silicon film (62); selectively etching off the first polycrystalline silicon film (58) and that portion (62A) of the second polycrystalline silicon film, in which one of arsenic and phosphorus has been diffused; forming a second insulating layer (64) at least on the surface of that portion (63A) of the second polycrystalline silicon film which exists on the second semiconductor region (50); removing the silicon nitride film (57) and the conductive film (56) which exist on the second semiconductor region (50), while using the second insulating layer (64) as a mask, to form an aperture and forming a third polycrystalline silicon film (69) so that the aperture (68) is covered by the third polycrystalline silicon film.
摘要:
A thin film transistor formed on an insulating substrate (1, 11) is disclosed in which metal silicide layers (10a, 10b; 15, 16) are formed in a thin film (2, 12) made of a monocrystalline, polycrystalline, or amorphous semiconductor material, to be used as source and drain regions, and further a gate electrode includes a metal silicide layer (10c, 17).
摘要:
The invention describes a display which comprises a film (2) mainly composed of silica which film absorbs a light having a wavelength of 250 nm more intensely than a light having a wavelength of 190 nm. It also describes a display, which comprises a film (2) mainly composed of silica which film does not substantially fluorescent when irradiated by argon gas laser at an output power of 100 mW. The display may be a cathode-ray tube or a liquid crystal display.
摘要:
A process for controlling an oxygen content of a non-superconductive or superconductive oxide is provided, in which a beam of particles such as ions, electrons or neutrons or an electromagnetic radiation is applied to the non-superconductive or superconductive oxide of a perovskite type such as YBa₂Cu₃O 7-x , thereby increasing or reducing the oxygen content of the oxide at the sites of oxygen in the crystal lattice of the oxide. Furthermore, a superconductive device such as a superconductive magnet, superconductive power transmission wire, superconductive transformer, superconductive shield, permanent current switch and electronic element is made by utilizing the process for controlling the oxygen concentration of the superconductive oxide.
摘要:
A semiconductor device has a structure in which two semiconductor substrates (1, 2) are coupled to each other through a semiconductor oxide film (3) and a metal silicide film (9), and a semiconductor element, for example, a bi-polar transistor is formed in the semiconductor substrate (2) on the metal silicide film side, whereby a metal silicide layer (9) having a high melting point is provided beneath one region of the bi-polar transistor for example, an n⁺ buried collector layer (5) and in ohmic contact with the n⁺ buried collector layer. An electrical isolation between the adjacent semiconductor elements is made by an insulating layer (12, 18).
摘要:
The invention relates to resin-molded axial lead-type semiconductor devices comprising a sub-assembly consisting of a semiconductor pellet (1) brazed between a pair of axial leads (5). The sub-assembly is sealed in an epoxy resin, which is formed by applying an epoxy resin, preferably a one-can-epoxy resin, onto the sub-assembly followed by curing the epoxy resin. Preferably, an epoxy resin having a thixotropic index of 1.0 to 2.5 and a gelation time 0.8 to 3 minutes is used. The invention further relates to a process for manufacturing these semiconductor devices which is characterised by: (A) horizontally holding the sub-assembly and dropping a predetermined amount of an epoxy resin onto the semiconductor pellet while turning the sub-assembly with the axial leads as rotation axis, (B) curing the epoxy resin, preferably by heating at 160° to 180°C for a period of 2 to 10 min, while turning the sub-assembly, so that the surface portions of the epoxy resin are cured, and (C) curing the epoxy resin, preferably by heating at 160° to 200°C for a period of 3 to 24 h while maintaining the sub-assembly stationary without turning it, so that the epoxy resin is completely hardened.
摘要:
An axial-lead glass-molded diode having at least one semiconductor element (3) clamped between a pair of electrode leads (2) by means of a brazing material, and provided with glass (5) covering the periphery thereof by means of molding. Each of the electrode leads comprises an electrode (6) composed of a core material (6a) and a tubular material (6b) and a lead (2) made of a material of the same kind as the core material (6a) and welded thereto. As the core material, a metal excellent in thermal and electrical conductivities, such as copper, is employed, while as the tubular material a metal having a thermal expansion coefficient smaller than that of the core material, such as an invar alloy, is employed, and the core material and the tubular material are metallurgically connected together. The thermal expansion coefficient of the electrode in the longitudinal sectional direction can be regulated by adjusting the thickness of the tubular material with respect to the core material in the crosssectional direction.