Patent ID: 7105853

Claim:
A superconductor integrated circuit comprising: a base electrode layer; a tunnel barrier layer disposed above the base electrode layer, the tunnel barrier layer having a lateral surface portion; a counter electrode layer disposed above the tunnel barrier layer; and an anodization ring disposed around a perimeter of the counter electrode layer and a perimeter of the tunnel barrier layer for preventing a short-circuit between an outside contact and the base electrode layer, wherein: a tunnel junction region is defined by the counter electrode layer, the tunnel barrier layer and the base electrode layer, the tunnel junction region including a junction contact defined by a top surface of the counter electrode, the junction contact having a diameter of approximately 1.00 μm or less; and the anodization ring includes an anodized portion of the counter electrode layer, an anodized portion of the lateral surface portion of the tunnel barrier layer and an anodized portion of the base electrode layer.