Abstract:
A method for producing a superconducting circuit pattern involves depositing onto a substrate, a thin film layer of a compound oxide which does not initially exhibit satisfactory superconducting properties at 77.degree. K., but which can be changed to become superconducting at that temperature by oxygen ion beam irradiation. A focused oxygen ion beam is directed onto predetermined areas in the form of a circuit pattern on the thin film layer to convert the predetermined areas to a superconducting compound oxide.
Abstract:
Concerns lithium-doped diamond: Low-resistivity n-type semiconductor diamond doped with lithium and nitrogen, and a method of manufacturing such diamond are provided. Low-resistivity n-type semiconductor diamond containing 10 17 cm -3 or more of lithium atoms and nitrogen atoms together, in which are respectively doped lithium atoms into carbon-atom interstitial lattice sites, and nitrogen atoms into carbon-atom substitutional sites, with the lithium and the nitrogen holding arrangements that neighbor each other. To obtain low-resistivity n-type semiconductor diamond, in a method for the vapor synthesis of diamond, photodissociating source materials by photoexcitation utilizing vacuum ultraviolet light and irradiating a lithium source material with an excimer laser to scatter and supply lithium atoms enables the diamond to be produced.
Abstract:
A logical operation element operative at high speed and integratable at a high degree of integration. A logical operation circuit is also disclosed. The logical operation circuit comprises a NOR element and a NAND element as logical operation elements. The Nor element has a structure in which the anodes of first and second field-emission micro electron emitters are brought to the same potential, and signal voltages of two or more systems are inputted into the gates electrodes corresponding to the emitters and in which when an input signal of high potential is inputted into either of the two systems, electrons are emitted from the emitter, and the potential of the anode is lowered. The NAND element has a structure in which the cathodes of first and second field-emission micro electron emitters are connected in series, signal voltages of two systems are applied to the gate electrodes corresponding to the first and second emitters, and the anode potential of the second emitter is lowered when both input signals are at high potentials.