摘要:
A sub-miniature push-on RF connector for connecting a transmission line to a signal sink. The connector has a shielded transmission line section having a signal line and a ground line extending axially through the connector. A center pin is coupled to the signal line and extends from the center of a front face of the connector in an axial direction. A semicircular tab coupled to the ground line extends from the front face of the connector substantially along the length of the center pin and partially surrounding the center pin to reduce an air gap impedance, the tab having first and second wire bonding surfaces at the ends of the semicircular shape thereof and disposed adjacent to said center pin.
摘要:
A superconducting thin film of compound oxide material deposited on a substrate, comprising a plurality of a-axis or b-axis oriented unit layers (2) and a plurality of c-axis oriented unit layers (1), each unit layer (1, 2) being made of the compound oxide material and being laminated alternately one over another on the substrate (3).
摘要:
Improvement in a process for fabricating a superconducting junction by depositing successively a first oxide superconductor thin layer, a non-superconducting intermediate thin film layer and a second oxide superconductor thin film layer on a substrate in this order.In the invention, the non-superconducting intermediate thin film layer is composed of MgO and the substrate is preheated at 600.degree.-650.degree. C. for at least 5 minutes in the presence of O.sub.2, and is heated at a temperature between 200.degree. and 400.degree. C. during the non-superconducting intermediate thin film layer is deposited.
摘要:
Improvement in a method for preparing a superconducting thin film of compound oxide on a substrate (6) by laser evaporation technique. A rear surface of a target (7) used is cooled forcedly by a cooling system (9) during film formation.
摘要:
Improvement in a process for preparing a-axis oriented thin film of high-Tc oxide superconducting material by laser evaporation method. Before the a-axis oriented thin film of oxide superconducting material is deposited by laser evaporation method, an under-layer having an a-axis orientation of the crystal of the same oxide superconducting material is deposited on a substrate previously by sputtering.
摘要:
An electrical connection between an electric conductor and an oxide superconductor is effected without the intermediary of a thin insulating layer that is formed by leaving the oxide superconductor in the atmosphere. This electrical connection is formed by removing the thin insulating layer that is formed by leaving the oxide superconductor in the atmosphere, and by electrically connecting the electric conductor and an exposed surface of the oxide superconductor.
摘要:
In order to prepare a good quality crystalline thin film of compound oxide superconductor on a silicon wafer, before the thin film of compound oxide superconductor is deposited on the silicon wafer, the silicon wafer is first heated at a temperature of higher than 900.degree. C. in a high vacuum of less than 10.sup.-6 Torr, then, a thin film of ZrO.sub.2 is deposited on the silicon wafer, and finally, the thin film of ZrO.sub.2 deposited on the silicon wafer is annealed in air at a temperature of 800.degree. to 850.degree. C.
摘要:
Method for preparing a superconducting thin film of compound oxide having improved properties on a substrate by laser evaporation technique. A target has a surface area which is smaller than an irradiation area of a spot of a laser beam used, so that whole surface of the surface is irradiated with the laser beam.
摘要:
A process for preparing a-axis oriented thin film of oxide superconducting material on a substrate by two steps. In the first step, an under-layer of an oxide superconducting material is deposited on the substrate under such a condition that the substrate is heated at a temperature which is suitable to realize an a-axis orientation of crystal of the oxide superconducting material. In the second step, an upper-layer of the same oxide superconducting material is deposited on a surface of the resulting under-layer under such a condition that the substrate is heated at a temperature which is lowered by 10.degree. to 100.degree. C. than the temperature which is used in the first step.
摘要:
A tunnel junction type Josephson device includes a pair of superconductor layers formed of a compound oxide superconductor material and an insulator layer formed between the pair of superconductor layers. The insulator layer is formed of a compound oxide which is composed of the same constituent elements as those of the compound oxide superconductor material of the superconductor layers but with an atomic ratio which does not present a superconductivity characteristics. In addition, the superconductor layers and the insulator layer are continuously formed while supplying oxygen.