This paper presents a significant advancement in fluxonium qubit technology, showcasing an overlap technique in Josephson junction fabrication that leads to near-perfect yield and enhanced coherence times. The new design incorporates over 100 Josephson junctions per superconducting loop, achieving less than 5% variation in production. Key highlights include:

• Over 100 Josephson junctions per loop in the new fluxonium design
• Enhanced coherence times due to improved fabrication techniques
• Less than 5% variation in junction uniformity across large-scale production
• Potential application in scalable quantum computing processors

The work represents a substantial step forward in the practical realization of quantum computing technologies, potentially leading to more robust and reliable quantum processors.