Patent ID: 9646259
Date: 2017-05-09
CPC Classifications: G06N,H01L

Claim:
1. A plurality of Josephson junction (JJ) quantum bit (qubits) arranged on a substrate, each of the plurality of qubits comprising: a dielectric layer; a superconductor base layer portion underlying the dielectric layer and having a first dielectric diffused region in the superconductor base layer portion adjacent a dielectric layer/ superconductor base layer portion junction; and a superconductor mesa layer portion overlying the dielectric layer and having a second dielectric diffused region in the superconductor mesa layer portion adjacent a dielectric layer/ superconductor mesa layer portion junction, the first and second dielectric diffused regions mitigating further diffusion from other semiconductor processes on the plurality of qubits; wherein the first and second dielectric diffused regions of a given JJ qubit define a critical current density of the given JJ qubit as a second critical current density that is greater than a first critical current density of the given JJ qubit implemented without the first and second diffused regions.