US 4,430,662 A · Superconductive tunnel junction integrated circuit

Abstract

Josephson junction integrated circuits of the current injection type and magnetically controlled type utilize a superconductive layer that forms both Josephson junction electrode for the Josephson junction devices on the integrated circuit as well as a ground plane for the integrated circuit. Large area Josephson junctions are utilized for effecting contact to lower superconductive layers and islands are formed in superconductive layers to provide isolation between the groundplane function and the Josephson junction electrode function as well as to effect crossovers. A superconductor-barrier-superconductor trilayer patterned by local anodization is also utilized with additional layers formed thereover. Methods of manufacturing the embodiments of the invention are disclosed.

Claims30

Dependent claims

A superconductive integrated circuit including at least one superconductive tunnel junction, said tunnel junction including first and second tunnel junction electrodes superposed with respect to each other with a superconductive tunneling barrier therebetween for conducting supercoonductive tunneling current between said first and second tunnel junction electrodes, said integrated circuit comprising,

a first layer of superconductive material, said first layer including said first tunnel junction electrode, and
a second layer of superconductive material superposed with respect to first layer, said second layer including said second tunnel junction electrode,
one of said first and second layers of superconductive material forming a ground plane for said integrated circuit as well as forming said tunnel junction electrode included therein.

Dependencies are inferred from the claim text.

Superconductive tunnel junction integrated circuit

Life of this patent

Superconductive tunnel junction integrated circuit

Life of this patent

Abstract

Claims30