"I am looking for sapphire substrate with the following specifications: C-cut (0001), 2 inch diameter, 430 µm thickness, 2-side polished. Could you please give me a quote and estimated arrival time for 25 substrates? If you have them available, could you please send me the data sheet?"
Sapphire Substrates for Superconducting Quantum Devices
Sapphire substrates are commonly used to fabricate superconducting quantum devices, including transmon qubits, microwave resonators, Josephson junction circuits, and other cryogenic quantum research structures. Sapphire offers excellent electrical insulation, thermal stability, and low microwave loss, making it a preferred substrate for many quantum computing and quantum sensing applications.
A quantum device fabrication scientist requested the following:
Reference #237646 for specifications and pricing.
Common Sapphire Specs for Quantum Research
- C-plane / C-cut (0001) sapphire
- 2 inch diameter substrates
- Double-side polished surfaces
- Low-defect, high-quality crystal material
- Custom thicknesses for superconducting device fabrication
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What Substrates Are Used to Fabricate Quantum Devices?
Quantum devices require carefully selected substrates because the wafer material can affect electrical isolation, microwave loss, crystal quality, thermal performance, and compatibility with thin-film deposition. Researchers use different substrates depending on whether they are fabricating superconducting qubits, quantum dots, spin qubits, color-center devices, quantum sensors, or optoelectronic quantum devices.
Common Substrates for Quantum Device Fabrication
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Silicon is widely used for quantum dot devices, spin qubits, and CMOS-compatible quantum research. High-purity silicon wafers are attractive because they can support scalable fabrication using established semiconductor processing tools.
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Sapphire is commonly used for superconducting qubits, microwave resonators, transmon qubits, and superconducting circuits. It provides strong electrical insulation, excellent thermal stability, and low microwave loss for cryogenic quantum applications.
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Silicon carbide is used for quantum devices based on color centers, including silicon vacancies and divacancies. SiC substrates are valuable for spin qubits, quantum sensing, and optoelectronic devices that require wide-bandgap semiconductor properties.
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Gallium Arsenide (GaAs) Wafers
GaAs is used for quantum dots, high-mobility heterostructures, quantum Hall effect devices, and spin-qubit research. Its high electron mobility makes it useful for advanced semiconductor and low-temperature transport studies.
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Diamond is used for nitrogen-vacancy (NV) center devices, quantum sensing, quantum communication, and quantum information research. Diamond's wide bandgap, optical properties, and stable defect centers make it important for quantum photonics and sensing applications.
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Strontium Titanate (SrTiO3) Substrates
Strontium titanate is used in oxide-based quantum devices, complex oxide heterostructures, and low-temperature electronic research. Its high dielectric constant and compatibility with oxide thin films make it useful for specialized quantum materials studies.
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Indium Phosphide (InP) Substrates
InP is used for optoelectronic quantum devices, photonic integrated circuits, quantum dot structures, and high-speed electronic applications. It is often selected when device performance depends on optical emission, high electron mobility, or compound semiconductor integration.
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Graphene, molybdenum disulfide (MoS2), tungsten diselenide (WSe2), and other 2D materials are used for quantum transport, van der Waals heterostructures, photonic devices, and nanoscale electronic research.
How to Choose a Quantum Device Substrate
The best substrate depends on the quantum effect being studied, the required crystal quality, film compatibility, dielectric loss, thermal conductivity, and fabrication process. For example, sapphire is often selected for superconducting qubits, silicon for CMOS-compatible spin qubits, GaAs for quantum dots and high-mobility heterostructures, SiC and diamond for color-center devices, and graphene or 2D materials for nanoscale quantum transport.
UniversityWafer, Inc. supplies research and production-grade substrates for universities, national laboratories, and semiconductor companies fabricating quantum devices. Submit your required material, diameter, orientation, thickness, polish, and quantity for a fast quote.