Order P-Type Silicon Wafers for Detector Applications
We supply detector-grade boron-doped silicon wafers for research, prototyping, and production in U.S. laboratories and fabs. Our inventory supports projects ranging from single-wafer R&D to full cassette runs.
High-resistivity, low-defect, and radiation-tolerant substrates are available in diameters from 25.4 mm to 300 mm.
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Popular Detector Wafer Options
- High-Resistivity P-Type (1k–20k Ω·cm)
- Float-Zone & DOFZ Silicon
- Ultra-Flat Substrates
- Thermal Oxide / SiN Coatings
- Custom Thinning Available
Quick Technical Specs
- Doping: Boron (P-Type)
- Resistivity: 0.01 – 20,000 Ω·cm
- Diameters: 25.4 mm – 300 mm
- Orientation: <100>, <111>
- Thickness: 200 µm – 725 µm
- Coatings: SiO₂, SiN (Optional)
Helpful Links
Related Silicon and Detector Resources
- P-Type Silicon Wafers Overview
- Silicon Wafer Catalog
- High-Resistivity Silicon Wafers
- Float-Zone Silicon Wafers
- Ultra-Flat Silicon Wafers
- Thermal Oxide Coated Silicon Wafers
- Silicon Nitride Coated Wafers
- 100 mm Silicon Wafers
- 150 mm Silicon Wafers
- Silicon Wafer Flatness and TTV Guide
- Semiconductor Research Blog
Why P-Type Silicon Is Now Central to Detector Design
P-type silicon has become the baseline substrate for next-generation radiation, timing, and imaging detectors. Irradiation studies project environments up to 3 × 1016 neq/cm², making material selection critical for long-term performance.
Modern p-type sensors are designed to avoid type inversion under high fluence, preserving electric field profiles and charge collection efficiency throughout detector lifetime.
Key Takeaways for Detector Engineers
- High-resistivity boron-doped material improves depletion behavior
- Low defect density reduces leakage current
- Oxygen control improves radiation tolerance
- Correct thickness balances speed and signal strength
- U.S.-based sourcing reduces delays and tariff risk
Material Properties That Define Detector Performance
Resistivity
Most detector projects require resistivity above 1 kΩ·cm to enable full depletion at moderate voltages. High-resistivity wafers improve charge collection while reducing power consumption.
Bulk Defects
Defect density influences how effective doping concentration changes under irradiation. Tight control of crystal quality stabilizes long-term detector behavior.
Oxygen Concentration
Diffusion-oxygenated float-zone (DOFZ) and oxygen-rich CZ wafers shape radiation-induced defect formation. This improves stability in harsh environments.
Float-Zone, DOFZ, and Czochralski Silicon
Choosing between FZ, DOFZ, and CZ silicon is one of the most important detector design decisions.
- FZ: Ultra-high purity, low oxygen
- DOFZ: Controlled oxygen for radiation hardness
- CZ: High oxygen, improved mechanical strength
We help U.S. teams match growth method to fluence, budget, and tooling compatibility.
Thickness, Flatness, and Surface Quality
Typical detector wafers range from 200 µm to 525 µm. Thinner wafers enable faster charge collection, while thicker substrates improve mechanical stability.
Ultra-flat wafers with TTV below 1 µm improve lithography alignment in fine-pitch detector structures.
Boron Doping Profiles and Surface Preparation
Boron concentration determines carrier density and noise behavior. Overdoping increases conductivity but can reduce depletion control and signal-to-noise ratio.
We also supply HF-etched and hydrogen-terminated surfaces for experiments sensitive to interface traps and surface states.
Wafer Sizing for U.S. Detector Tooling
Tooling compatibility strongly influences wafer selection in U.S. cleanrooms.
- 1–2 inch: Prototype devices
- 100 mm: Primary R&D platform
- 150 mm: Pilot production
- 200 mm+: Process development
Four-inch (100 mm) wafers remain the most popular size for grant-funded detector programs.
Tariffs, Lead Times, and U.S. Supply Chains
Imported wafers may incur double-digit tariff increases and customs delays. These costs often exceed initial material savings.
We leverage U.S. and tariff-advantaged suppliers to keep detector projects on schedule and on budget.
Oxide, Nitride, and Metal Stack Integration
Most detector designs require integrated dielectric and metal layers.
- Thermal SiO₂ for isolation
- LPCVD / PECVD SiN for passivation
- Sputtered metals for contacts
Single-vendor substrate and coating sourcing simplifies purchasing and quality control.
Educational and Research Support
Many U.S. universities use our p-type wafers for detector physics and semiconductor device courses. Small-lot and coupon formats support student fabrication labs.
Our educational resources shorten the learning curve for graduate students entering detector research.
Conclusion: Choosing the Right Detector Substrate
Selecting p-type silicon wafers is a system-level decision linking material science, radiation hardness, wafer geometry, logistics, and cost.
By combining high-quality boron-doped substrates, ultra-flat and coated options, and U.S.-friendly sourcing, we help research teams build detectors ready for next-generation experiments.
Contact our technical team to discuss your radiation environment, detector geometry, and tooling requirements.