Silicon spin-qubit hardware developer Quobly has achieved single-chip execution of qubit readout, single-qubit gates, and two-qubit gates on its proprietary QSOI® architecture. The quantum processing unit (QPU) was fabricated on an industrial 300-millimeter semiconductor production line using Fully Depleted Silicon-on-Insulator (FD-SOI) CMOS technology at STMicroelectronics’ manufacturing facility in Crolles (Grenoble, France).
The milestone validates Quobly’s technology transfer strategy, confirming that the three foundational quantum operations can be co-integrated alongside classical control circuitry on commercial 300mm FD-SOI silicon. Built using isotopically enriched silicon-28 (28Si) wafer substrates, QSOI® leverages Very Large-Scale Integration (VLSI) principles to co-integrate quantum dot arrays with cryogenic control electronics on the same die. To support scaling toward million-qubit systems by 2032, the company has also established a proprietary cryogenic Process Design Kit (PDK) for multi-block circuit layouts.
| [ Quobly 300mm QSOI® Platform Technical Specifications ] | ||
|---|---|---|
| Fabrication & Material Baseline | Demonstrated Single-Chip Operations | Commercial & Scaling Roadmap |
| • 300mm Commercial Foundry (STMicroelectronics) • FD-SOI CMOS Process Node • Enriched Silicon-28 (28Si) Substrates | • Single-Qubit Logic Gates • Two-Qubit Entangling Gates • On-Chip Qubit Readout & Cryo-CMOS PDK | • Alloy Pioneer QPU: Cloud Access late 2026 • €115M Series A Funding: Closed June 2026 • Long-Term Target: 1 Million Qubits by 2032 |
The single-chip validation supports Quobly’s Alloy product roadmap. The company plans to make its initial system, Alloy Pioneer, available via cloud access by the end of 2026 for high-performance computing (HPC) and academic research partners. The announcement follows Quobly’s €115 million ($133.5M USD) Series A financing round and strategic material partnerships with Air Liquide, Soitec, and Orano to secure an industrial-grade 28Si supply chain across Europe.
Review the official press release via Quobly Press Room here, and examine our prior coverage of Quobly’s €115 Million Series A Financing here, Quobly and Absolut System Cryogenic Roadmap Execution here, and Quobly’s Industrialization Agreements with TNO and OrangeQS here.
September 16, 2026
