The study introduces an innovative overlap process for fabricating Josephson junctions, significantly improving coherence times of fluxonium qubits. This new method results in nearly perfect yield and maintains junction uniformity across large wafers, pivotal for scaling up the production of quantum computing elements. The overlap design used in fluxonium qubits showcases remarkable improvements in qubit performance with extended energy relaxation times.

• Over 100 Josephson junctions per qubit in the design.
• Demonstrates an energy relaxation time exceeding 1 millisecond.
• Suggest scalability using CMOS-compatible processes for practical applications.

This research marks an essential milestone in the production of quantum computing components, showing how innovative techniques can overcome traditional challenges in junction fabrication and consistency. The potential for applying such advancements to broader quantum computing systems could immensely enhance their reliability and efficiency.