US PATENT SUBCLASS 505 / 329
.~ Producing Josephson junction, per se (e.g., point contact, bridge, barrier junction, SIS, SNS, SSS, etc.)

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

300  DF  PROCESSES OF PRODUCING OR TREATING HIGH TEMPERATURE (Tc GREATER THAN 30 K) SUPERCONDUCTOR MATERIAL OR SUPERCONDUCTOR CONTAINING PRODUCTS OR PRECURSORS THEREOF {24}
329.~ Producing Josephson junction, per se (e.g., point contact, bridge, barrier junction, SIS, SNS, SSS, etc.)

DEFINITION

Classification: 505/329

Producing Josephson junction, per se (e.g., point contact, bridge, barrier junction, SIS, SNS, SSS, etc.):

(under subclass 300) Process that is limited to the production of a Josephson junction, per se (i.e., a connection 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).

(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:

330, for manufacture of a semiconductor device or thin film electric solid-state device containing more components than a single Josephson junction.

SEE OR SEARCH CLASS

216, Etching a Substrate: Processes, 3, for producing a high Tc (greater than 30oK) Josephson Junction and involving an etching step.