L-shaped Josephson tunnel device

The base electrode is L-shaped so that the horizontal leg of the L is used for the tunnel junction area. Located over the base electrode is the oxide tunnel barrier. The counter electrode is deposited over the tunnel barrier, and a control line overlapping the entire Josephson structure is in the direction of the counter electrode. Because the base electrode is L-shaped, thick insulation need not be provided between it and control line. Since the counter electrode does not contain In, it is easy to provide a thick native oxide on it. Thus, the tunnel device is totally insulated from the control line. The gain curve for this configuration is the same as for the true ''in-line'' gate