Sample Silicon Wafer TDS and CoC
Review a sample silicon wafer technical data sheet (PDF) for the types of material, geometry, electrical, and surface specifications that may be documented. Values in a sample sheet are illustrative; request the specification for the exact item you plan to purchase.
For shipment documentation, see a sample silicon wafer certificate of conformity (PDF). Ask whether a product-specific CoC or lot test report is available before ordering.
What customers ask us for
Customers commonly request a TDS, confirmation of CoC availability, price breaks, minimum order quantity, lead time, and shipping terms. If chemical safety documentation applies, they may also request a safety data sheet (SDS, formerly MSDS). The documents serve different purposes and their availability depends on the product.
“We need confirmation on whether a Certificate of Conformity (CoC) is provided for the products,” along with a technical data sheet, price breaks, lead time, and delivery terms.
Another customer requested the company's ISO certificate, confirmation of CE conformity when applicable, a TDS, and an SDS or MSDS for the ordered parts.
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What Is a Semiconductor Wafer Technical Data Sheet?
A technical data sheet (TDS) describes a product's stated characteristics and available specifications. For a silicon wafer, it may list crystal growth method, orientation, dopant, resistivity, diameter, thickness, and surface finish. The parameters included depend on the supplier and product. A general TDS helps you screen materials, while an item specification or purchase agreement defines the requirements for a particular order.
What to Check in a Silicon Wafer TDS
- Material: crystal growth method such as Czochralski (CZ) or float zone (FZ), crystal orientation, and conductivity type.
- Geometry: nominal diameter and thickness, thickness tolerance, total thickness variation (TTV), bow, warp, and edge profile when specified.
- Electrical characteristics: dopant type and resistivity range, with a measurement method or acceptance range when relevant.
- Surface: single- or double-side polish, roughness, particle or defect limits, and any surface coating.
Other products require different fields. A silicon-on-insulator (SOI) wafer may need device-layer and buried-oxide thicknesses; a thermal oxide wafer may need oxide thickness and uniformity. For silicon carbide or gallium nitride, confirm the relevant crystal, electrical, and epitaxial specifications rather than applying a silicon-only checklist.
How Engineers Use a TDS
Compare the stated values with your process requirements. Diameter and edge profile affect equipment fit; thickness and TTV matter for handling, lithography, and bonding; orientation and resistivity can affect device design. If a parameter is critical, specify its acceptable range and ask how it is measured. A TDS can support a purchasing decision, but it does not by itself certify that a particular shipment passed inspection.
TDS vs. Certificate of Conformity vs. SDS
- TDS: describes a product's technical characteristics or available specification ranges.
- Certificate of conformity (CoC): declares that identified material conforms to stated purchase specifications or referenced requirements, according to the scope of that certificate. A separate test report may be needed for measured lot results.
- Safety data sheet (SDS): communicates chemical hazards, handling, and safety information when applicable. It is a separate document from the wafer TDS and is sometimes called an MSDS in older requests.
Documentation and applicable standards depend on the product and the agreement with the supplier. Confirm the available TDS, CoC, test report, and SDS for your specific item rather than assuming every wafer includes all four.