⚡ Researcher's Favorite
3 Inch Mechanical Grade
Type: P/Boron or N/Phos
Thickness: 380µm
Polish: Single Side Polished (SSP)
Perfect for spin coating, practice handling, and dummy runs.
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Why Buy 3 Inch Wafers?
- Cost Effective: Lower cost per wafer compared to 100mm or 150mm silicon wafers.
- Legacy Equipment: Fits older SEM, sputtering, and spin coating chucks found in university labs.
- Availability: We keep massive stock of 3" wafers, ready to ship today.
In-Stock 3 Inch Inventory
We stock the widest variety of 76.2mm wafers. Below are our most popular specifications.
| Type | Dopant | Orientation | Resistivity | Thickness | Grade | Link |
|---|---|---|---|---|---|---|
| P-Type | Boron | <100> | 1-10 ohm-cm | 380µm | Prime | Buy |
| N-Type | Phos | <100> | 1-10 ohm-cm | 380µm | Prime | Buy |
| P-Type | Boron | <111> | 0.001-0.005 | 380µm | Test | Buy |
| Undoped | None | <100> | >10,000 | 380µm | Float Zone | Buy |
| Any | Any | Any | Any | ~380µm | Mechanical | Buy |
Application Spotlights
🔬 For SEM Imaging & Microscopy
Recommended Spec: Highly conductive (Low Resistivity) P-type or N-type.
Client Story: A biochemistry scientist needed substrates for high-resolution SEM imaging. The critical requirement was a conductive surface to prevent charge accumulation. We recommended and supplied Low Resistivity (0.001-0.02 ohm-cm) silicon wafers, which ensure a clean, smooth path for electrons, resulting in crisp imaging without charging artifacts.
Reference Case #220876
🌀 For Spin Coating & Mechanical Testing
Recommended Spec: Mechanical Grade.
Client Story: A biomedical engineering PhD candidate was looking for "3 inch diameter metallic wafers" (silicon) specifically for spin coating experiments. Since the surface would be coated, they preferred a cost-effective option without extra treatments. We recommended Mechanical Grade wafers. These provide the correct geometry and surface adhesion properties for spin coating but at a significantly lower price point than Prime grade.
Reference Case #102048
🧪 For Microfluidics & Cell Sorting
Recommended Spec: Prime Grade, <100> Orientation.
Researchers at Harvard and CNRS have used our Item #978 (3" P<100> Prime) to fabricate droplet-based microfluidic devices. The ultra-flat Prime surface is essential for bonding to PDMS and creating leak-proof channels for single-cell analysis.
Standard 3 Inch Wafer Specifications
Understanding the geometry of a 3-inch wafer is crucial for handling and alignment.
- Diameter: 76.2mm ± 0.3mm
- Thickness: 380µm ± 25µm (Standard)
- Primary Flat Length: 22.22mm ± 3.17mm
- Secondary Flat: Indicates doping type (P-type vs. N-Type) and Orientation (<100> vs <111>) according to SEMI standards.