Silicon-Wafers With Low Surface Roughness
Low surface roughness silicon wafers are essential for advanced semiconductor fabrication, epitaxial growth, MEMS, photonics, quantum devices, and precision thin-film deposition. UniversityWafer supplies CMP polished silicon wafers with surface roughness values as low as Ra = 1 Å, available in multiple diameters, crystal orientations, dopant types, and resistivity ranges to meet demanding research and production requirements.
Ultra-Smooth Silicon Wafers for Surface-Sensitive Research
UniversityWafer supplies prime-grade silicon wafers with ultra-low surface roughness for applications requiring exceptional surface quality. Through advanced chemical mechanical planarization (CMP), polished silicon substrates can achieve surface roughness values as low as Ra = 1 Å (0.1 nm) for demanding semiconductor and nanotechnology research.
Researchers frequently specify low-roughness wafers for thin-film deposition, epitaxial growth, MEMS fabrication, quantum devices, AFM measurements, photonics, and other surface-sensitive processes where minimizing defects and maximizing film uniformity are critical.
Available options include P-type and N-type silicon, multiple crystal orientations, diameters from research samples to production wafers, various resistivity ranges, and single-side or double-side polished finishes.
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Low Surface Roughness Silicon Wafers
UniversityWafer supplies silicon wafers with exceptionally low surface roughness for applications requiring ultra-smooth surfaces. Using advanced chemical mechanical planarization (CMP), polished silicon substrates can achieve surface roughness values as low as Ra = 1 Å (0.1 nm) or better, making them suitable for semiconductor fabrication, MEMS, thin-film deposition, photonics, and surface-sensitive research.
Ultra-low roughness wafers improve film uniformity, reduce interface defects, and enhance device performance in applications such as epitaxial growth, optical coatings, nanotechnology, quantum devices, and precision metrology.
Research Inquiry
Customer Request:
"I was wondering if you had an n-doped (or p-doped) silicon wafer with very low surface roughness, approximately Ra = 1 Å or less."
UniversityWafer Response:
Yes. We can supply ultra-smooth CMP polished silicon wafers that meet these requirements.
Example Specification
- Diameter: 3 inch (76.2 mm)
- Orientation: <100>
- Dopant: N-type (P-type also available)
- Resistivity: 1–10 Ω·cm
- Thickness: 380 µm
- Polish: Single-Side Polished (SSP)
- Quantity: 25 wafers
- Surface Roughness: Ra ≤ 1 Å
Additional diameters, orientations, dopants, resistivities, and polishing options are available upon request.
How Surface Roughness Is Achieved
The ultra-low surface roughness is achieved through repeated chemical mechanical planarization (CMP) polishing cycles rather than destructive surface testing. Standard prime-grade polished silicon wafers typically exhibit a surface roughness below 0.5 nm, while additional CMP processing can further reduce roughness for demanding research applications.
Because direct roughness measurements such as Atomic Force Microscopy (AFM) or stylus profilometry would require destructive sampling or testing of representative wafers, Certificates of Conformance (CoC) generally certify the polishing process rather than providing individual roughness measurements.
Applications Requiring Ultra-Smooth Silicon Wafers
- Thin-film and epitaxial growth
- MEMS and NEMS fabrication
- Photonics and integrated optics
- Quantum device research
- Surface science and AFM studies
- Nanotechnology and precision metrology
- High-performance semiconductor device fabrication
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