Silicon Wafers: Prime, Test, & Specialty Grades

UniversityWafer, Inc. supplies a comprehensive range of silicon wafers, from ultra-thin 25µm membranes to standard 12-inch (300mm) production wafers. We support research and industry with SOI, Float Zone (FZ), and coated substrates available in single-wafer quantities or full cassettes.

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Available Materials

Silicon Wafer Grades & Specifications

We provide a wide variety of silicon wafers tailored to specific applications. Whether you need Prime Grade for active device fabrication or Test/Monitor Grade for equipment calibration, we have stock available.

Crystal Growth: CZ vs. FZ

Understanding the growth method is critical for your application:

  • Czochralski (CZ): Grown in a quartz crucible. Contains interstitial oxygen which improves mechanical strength. Standard for ICs and MEMS.
  • Float Zone (FZ): Grown without a crucible. Extremely high purity, low oxygen, and high resistivity. Ideal for power devices, RF applications, and detectors.

Wafer Orientation

Wafers are cut to specific crystal orientations, typically <100> for MOSFETs and general applications, or <111> for bipolar devices. Flats or notches on the wafer edge indicate the orientation and doping type.

Specialty Silicon Products

Super-Thin Silicon

We supply wafers thinned to 5µm, 10µm, 25µm, 50µm, and 100µm. These are essential for flexible electronics, advanced packaging, and through-silicon via (TSV) applications. View Ultra-Thin Inventory.

Thin Films & Coatings

We offer in-house deposition services to save you processing time:

  • Thermal Oxide: Wet or Dry oxide up to 10µm thick.
  • Nitride (Si3N4): LPCVD (Stoichiometric, Low Stress) and PECVD.
  • Metals: Sputtered or Evaporated films including Au, Pt, Ti, Al, Cu, Cr, Ni, and ITO.

Silicon-on-Insulator (SOI)

SOI wafers feature a thin silicon device layer separated from the handle wafer by a buried oxide (BOX) layer. They are critical for MEMS, high-speed RF, and low-power radiation-hardened electronics.

Partial Cassettes & Single Wafers

Unlike major fabs that require bulk orders, we specialize in partial cassettes. You can order as few as one wafer for prototyping. We stock all standard diameters:

  • 300mm (12 inch)
  • 200mm (8 inch)
  • 150mm (6 inch)
  • 100mm (4 inch)
  • 76mm (3 inch)
  • 50mm (2 inch)