SEALSQ Corp shifts focus to CMOS-compatible quantum architectures

SEALSQ Corp said it increased its focus on CMOS-compatible quantum computing architectures, stating it viewed long-term quantum scalability as tied to alignment with semiconductor technology.

The company prioritized silicon spin qubits and electrons-on-helium platforms and concentrated investments on qubit technologies that could be fabricated, integrated, and scaled using established semiconductor CMOS processes and manufacturing capabilities. It said it was integrating Post-Quantum Cryptography (PQC) and hardware-based trust mechanisms into the system architecture to address security as processors advanced.

SEALSQ described silicon spin qubits as using electrons in silicon and as manufacturable with chip-making methods similar to CMOS. It described electrons-on-helium qubits as using electrons above superfluid helium on a silicon chip with CMOS-compatible controls and as offering a low-noise alternative, and it cited FDSOI as a wafer-level technology that used a thin silicon layer on an insulating layer to reduce power consumption and noise.

The firm outlined system-level requirements such as dense arrays of control electrodes, high-speed signal routing, cryogenic-compatible electronics, and precise calibration and monitoring infrastructure. It said secure elements fabricated alongside or integrated with quantum control circuitry would provide trusted boot, device attestation, and Secure Key Storage (SKS), and that embedded PQC could protect control systems, firmware updates, calibration data, interconnect communications, and Field Programmable Gate Array (FPGA) configurations when manipulating qubits.

“From our perspective, this technology alignment is a real advantage over other quantum approaches, such as superconducting or ion-trap systems. While those platforms are scientifically impressive, they often depend on specialized materials, custom fabrication steps, or complex optical and vacuum setups that do not align as naturally with mainstream semiconductor manufacturing. In contrast, silicon spin qubits and electrons-on-helium architectures are designed from the start to evolve within the semiconductor ecosystem.

This alignment not only accelerates learning cycles but also ensures a smooth transition from research to production. Most importantly, it allows us to enable security-by-design through post-quantum cryptography (PQC) and hardware-based trust, positioning SEALSQ at the intersection of quantum innovation and secure manufacturing.” said Carlos Moreira, Founder and CEO of SEALSQ. The communication included forward-looking statements regarding SEALSQ's business strategy, financial performance, and expectations.