Quobly Achieves Single-Chip Readout and Gates on 300mm Industrial Silicon Process, Validating QSOI® Architecture for Scalable Quantum Computing

September 20, 2026

Quantum Computing Report France

Overview

Quobly, a silicon spin qubit hardware developer, has successfully demonstrated single-chip execution of qubit readout, single-qubit gates, and two-qubit gates on its proprietary QSOI® architecture. Manufactured using an industrial 300mm semiconductor production line at STMicroelectronics, this milestone confirms the co-integration of fundamental quantum operations with classical control circuitry on commercial FD-SOI silicon, validating Quobly’s strategy for scalable quantum computing.

In Depth

Key Findings

Quobly, a company specializing in silicon spin qubit hardware development, has successfully demonstrated the execution of all three fundamental quantum operations—qubit readout, single-qubit gates, and two-qubit gates—on a single chip utilizing its proprietary QSOI® architecture. This Quantum Processing Unit (QPU) was fabricated on an industrial 300-millimeter semiconductor production line at a STMicroelectronics manufacturing facility. This achievement validates the feasibility of co-integrating these critical quantum operations with classical control circuitry on commercial 300mm FD-SOI silicon, marking a significant step towards manufacturing large-scale, commercially viable quantum computers.

Technical Details

Quobly’s QSOI® (Quantum Silicon-On-Insulator) architecture is specifically designed for compatibility with existing industrial semiconductor manufacturing technologies. The recent demonstration involved a chip produced on a 300-millimeter wafer that proved capable of performing all essential quantum operations: qubit initialization, information readout, and the fundamental elements of quantum computation—single-qubit gates (e.g., Pauli X, Y, Z, and Hadamard gates) and two-qubit gates (e.g., controlled-NOT gates). A particularly noteworthy aspect is the physical integration of these quantum operations with classical electronic circuits on the same chip. This integration is crucial for reducing the vast number of interconnects and external components typically required for qubit control and readout, thereby addressing key scalability challenges. The use of STMicroelectronics’ industrial 300mm FD-SOI (Fully Depleted Silicon-On-Insulator) process harnesses state-of-the-art CMOS technology, enabling high-quality fabrication and high-density integration of qubits.

Background & Context

Silicon spin qubits are a prominent technology in quantum computing due to their potential for miniaturization and their compatibility with existing semiconductor manufacturing infrastructure. However, realizing qubit control, readout, and especially entanglement between multiple qubits on a single chip at an industrial scale has been a significant technical hurdle. Quobly’s achievement of demonstrating all these fundamental operations on an industrial 300mm silicon process strongly suggests that this technology is moving beyond the laboratory experimental phase into a commercial, mass-production capable stage. This milestone unequivocally indicates that silicon qubit technology is making steady progress towards the realization of fault-tolerant quantum computing, which will require a much larger number of physical qubits.

Strategic Significance & Outlook

The successful demonstration of comprehensive quantum operations on a single chip validates Quobly’s technology as highly promising for constructing large-scale quantum computing platforms. The confirmed manufacturability on an industrial 300mm semiconductor production line suggests the potential for future mass production, which could lead to reduced costs and increased supply stability for quantum chips. This will accelerate the development of high-performance QPUs with a greater number of qubits, significantly shortening the path to quantum computing commercialization. Quobly, building on this technology, aims to contribute to a future where quantum computers can solve complex problems currently intractable for even the most powerful supercomputers, potentially driving innovation across diverse fields such as materials science, drug discovery, and financial modeling.

Source: https://quantumcomputingreport.com/quobly-demonstrates-single-chip-readout-and-gates-on-300mm-industrial-silicon-process/

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