SiC Seed Crystal Substrate
Seed substrates must be evaluated with regard to polytype, orientation and the crystal-growth process rather than device-wafer specifications alone. Contact WEGITEK with your required specifications, quantity and drawings for a technical quotation.
SiC Seed Crystal Substrate: Material Overview
SiC Seed Crystal Substrate is considered for power electronics, RF and device research, epitaxy development and semiconductor equipment process qualification. Silicon carbide is a wide-bandgap semiconductor valued for its combination of high breakdown field, thermal conductivity and operation in demanding device environments. As-cut, lapped and seed substrates are intermediate formats and are not necessarily epi-ready.
Seed substrates must be evaluated with regard to polytype, orientation and the crystal-growth process rather than device-wafer specifications alone.
Engineering and Specification Considerations
Confirm cut marks, parallelism, damage removal, surface state and intended next process.
- Diameter
- thickness and tolerance
- 4H/6H polytype
- Si-face/C-face
- off-axis angle
- doping
- grade
- polish
- defect limits
Quality and Inspection Priorities
Engineering acceptance should be defined before order confirmation. Depending on grade and use, the inspection review may include:
- Polytype verification
- crystal orientation
- conductivity type
- resistivity
- micropipe / dislocation metrics
- TTV
- bow
- warp
- edge condition and surface defects
Where possible, request the inspection method, measurement location and batch documentation alongside the numeric limit.
Applications and Selection Guidance
Potential application fields include power electronics, RF and device research, epitaxy development and semiconductor equipment process qualification. The final selection depends on thermal, electrical, optical and mechanical operating conditions. Share the process step and acceptance criteria to help the supplier evaluate feasibility.
Frequently Asked Question
What distinguishes a device-grade SiC wafer from a dummy or test-grade wafer?
The relevant acceptance criteria can include crystallographic quality, defect density, resistivity, surface preparation and the inspection method. A grade label alone is not a substitute for a signed specification.
What should be included in a request for quotation?
Send the part name or drawing, material grade, diameter/size, thickness, orientation, surface finish, quantity and required tests. If you have a target delivery date or acceptance specification, include it at the outset.
Specification status: Product descriptions are reference information, not a published stock or performance guarantee. Final specifications, manufacturing options, price and delivery require written confirmation.