Title:
SUPERCONDUCTIVE DEVICE
Document Type and Number:
Japanese Patent JPS6218776
Kind Code:
A
Abstract:
PURPOSE:To obtain the Josephson element having variable I-V characteristic by depositing an insulating layer, an injection electrode layer, an insulating layer, and an upper electrode layer on a lower electrode layer spread on a substrate and cutting one end of those layers with inclination and spreading a thin weak combining body on that inclined plane, thereby combining the upper and lower electrode layers. CONSTITUTION:A lower electrode layer 22 consisting of Nb or Pb is spread on a substrate 21 and further on that, an SiO2 layer 23, an injection electrode layer 24 consisting of a normally-conductive metal or a superconductive metal such as Nb, an SiO2 layer 25, and an upper electrode layer 25 of superconductive metal are formed by lamination. One end of this lamination is cut obliquely in expansion toward the lower layers while keeping those layers placed on the electrode layer 22. Then, a weak combining body 27 consisting of Bi, Te, or Al several hundred Angstrom thick is spread from the end surface of the electrode layer 26 to the electrode layer 27. Thus, tunnel barriers are produced between the weak combining body 27 and the electrodes 22, 24, and 26, respectively and the wide-range control of I-V characteristic becomes possible. And, the quasi-plane type Josephson element of high speed and low electric consumption can be obtained.
Inventors:
HARADA NAOKI
Application Number:
JP15865385A
Publication Date:
January 27, 1987
Filing Date:
July 17, 1985
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
H01L39/22; (IPC1-7): H01L39/22
Attorney, Agent or Firm:
Sadaichi Igita