US PATENT SUBCLASS 505 / 190
.~ Josephson junction, per se (e.g., point contact, bridge, barrier junction, SIS, SNS, SSS, etc.) or Josephson junction with only terminals or connect

Current as of: June, 1999
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505 /   HD   SUPERCONDUCTOR TECHNOLOGY: APPARATUS, MATERIAL, PROCESS

150  DF  HIGH TEMPERATURE (Tc GREATER THAN 30 K) DEVICES, SYSTEMS, APPARATUS, COM- PONENTS, OR STOCK, OR PROCESSES OF USING {26}
190.~ Josephson junction, per se (e.g., point contact, bridge, barrier junction, SIS, SNS, SSS, etc.) or Josephson junction with only terminals or connect

DEFINITION

Classification: 505/190

Josephson junction, per se (e.g., point contact, bridge, barrier junction, SIS, SNS, SSS, etc.), or Josephson junction with only terminals or connect:

(under subclass 150) Device, per se, (a) consisting of a pair of superconductive regions separated by a thin, less conductive portion or gap capable of exhibiting electron or Cooper paired electron tunneling current flow between superconducting regions referred to as a Josephson junction, per se, or (b) Josephson junction combined with only terminals or contacts.

(1) Note. Under certain conditions, a potential appears across the Josephson junction and high frequency radiation emanates from it. Under the influence of high frequency radiation, current flow through the Josephson junction may also be changed.

(2) Note. One should not assume that all so-called barriers are indicative of Josephson junctions, which require a barrier sufficiently thin for tunneling of electrons. Moreover, in this art, a barrier can have other functions, such as a protective barrier to prevent poisoning or inactivation of superconductive material, or as an insulative barrier, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

162, for SQUID device containing a Josephson junction.

170, for information processing or storage or retrieval system, device, or component.

191+, for semiconductor or thin film solid-state devices that may contain a Josephson junction, such as a Josephson transistor.

233+, for layered structure containing a superconductor layer. SEE OR SEARCH CLASS

257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes), for devices containing low temperature superconducting Josephson junctions.

365, Static Information Storage and Retrieval, particularly

160+, for systems with a superconducting component.