Josephson device formed over a recess step with protective layer

Active solid-state devices (e.g. – transistors – solid-state diode – Thin active physical layer which is – Tunneling through region of reduced conductivity

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257 35, 505817, 505832, 505162, H01L 3922, H01B 1200, C23C 1400, G11C 1144

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active

053130740

ABSTRACT:
In a Josephson device which can be employed as a sensor including superconductor for measuring an extremely weak magnetic field, a Josephson junction consisting of superconducting material is formed, and a covering layer consisting of ordinary conducting metal or semiconductor is formed on the Josephson junction. This enables the Josephson junction to be isolated from the oxidized atmosphere. Further, the covering layer is not to present any deterioration such as cracks even upon being subjected to a thermal hysteresis from very low temperature to ordinary temperature.

REFERENCES:
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patent: 5057485 (1991-10-01), Nishino et al.
patent: 5061971 (1991-10-01), Takemura et al.
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Dilorio et al., "Practical high T.sub.c Josephson junctions and dc SQUIDs operating above 85K", Appl. Phys. Lett., vol. 58, #22, Jun. 3, 1991, pp. 2552-2554.
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Spring Meeting, the 37th Japan Society of Applied Physics and related Societies (Mar. 28, 1990) with a translation thereof.
DC Squid with Variable Thickness Bridge, Physica B 165 & 166 (1990) 78-80 North-Holland.

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