DoiTeQ

Diamond-based quantum devices represent a leading edge in quantum technology, providing a unique combination of capability for room-temperature operation, stable solid-state platforms and long coherence times. Despite these advantages, industrial-scale production faces significant hurdles, including high fabrication costs, low yields and slow development cycles. Fabrication techniques are generally incompatible with conventional, complementary metal-oxide-semiconductor (CMOS) manufacturing processes. DoiTeQ removes these barriers by creating custom-sized, thin diamond layers bonded onto conventional insulating substrates: a revolutionary advance in scalability of diamond-based quantum technology.

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First of its kind

While Diamond-on-Insulator (DOI) concepts are well recognised in academic and research entities, scaling to industrial production has faced significant challenges. DoiTeQ bridges this critical gap between laboratory demonstration and commercial viability.

The DoiTeQ platform facilitates the bonding of large-area, high-quality diamond layers onto conventional insulating substrates, enabling the use of large and uniform diamond layers rather than limited, fragmented patches only a few hundred micrometres in size. It also preserves the exceptional quantum properties of diamond, while enabling compatibility with standard CMOS and micro/nano-fabrication technologies. This enables the scalable, industrial-level production of diamond-based quantum devices, including colour-centre qubits and photonic components.

Revolutionary technique

DoiTeQ uses a smart-cut-based process to transfer ultra-thin diamond layers onto insulating substrates. This enables precise control over layer thickness and the formation of high-quality interfaces, which are essential for quantum device performance and scalable manufacturability.

To drive the development of novel device architectures and industrial-scale quantum manufacturing, the DoiTeQ method provides substantial improvements across the entire production cycle:

  • Manufacturing efficiency: Improved production scalability, higher fabrication yields and enhanced batch-to-batch reproducibility.
  • Sustainability: Fewer process steps and more efficient material use reduce waste and energy consumption, supporting more sustainable manufacturing processes.
  • Speed to market: Simplified workflows significantly reduce processing time, fabrication complexity and manual handling, which accelerates device prototyping.

Industry acceleration

Organisations developing quantum sensing, quantum communication and quantum information processing devices can benefit from DoiTeQ. It significantly improves device fabrication, production scaling and integration with existing semiconductor and photonic technologies. For semiconductor and photonics manufacturers, DoiTeQ can facilitate hybrid devices that combine diamond quantum systems with photonic circuits and electronic control platforms.

Advanced diamond-based sensors enabled by DoiTeQ can deliver exceptionally sensitive measurement of magnetic, electric and temperature changes that far exceed conventional sensor capabilities. This can transform medical diagnostics, navigation, materials science and environmental monitoring.

Expertise that drives change

TNO’s expertise in materials science, surface engineering, quantum physics and advanced fabrication processes enabled this critical breakthrough in diamond-based technologies. The achievement of bonding diamond layers to the substrate overcomes the dimensional constraints that have limited previous methods. To our knowledge, this approach is the most promising, currently groundbreaking method for high-quality, scalable integration of diamond-based devices.

DoiTeQ emerged from collaborative effort at TNO, involving quantum scientists, system engineers and cleanroom fabrication specialists, all bringing extensive experience in large-scale industrial projects. This multidisciplinary approach – combining expertise from optics, semiconductor technology, materials research and system engineering – created a robust, scalable and industry-ready manufacturing process.

Accelerate your quantum device development with diamond-based systems. Contact us to discover how DoiTeQ can help you scale production, improve yields and bring next-generation quantum devices to market.