Finding a supplier of silicon carbide (SiC) wafers is not the simplest of tasks. SiC wafers are required by electric vehicles (EVs), inverters, photovoltaics and much more. Whoever you chose can have an enormous bearing on the performance, quality and success of your device along with the cost of the provider. Make the right choice thanks to this guide to finding your SiC wafer supplier.
Know what you want
Long before you actually go out looking for a supplier you should know exactly what you want. There’s a plethora of 4,6,8in SiC base materials, with a variety of doping levels and other characteristics. Who you call on will depend on the application—EVs, electric power devices, photovoltaics. A few of the parameters you should have clear in your mind:Wafer SizeThickness—think about this beforehand, as different applications may have gradients of wafer. Power devices tend to use 6in, while larger (8in) types are needed for higher volume production.Doping Type—SoC wafers can be n- or p-typed, and the doping will bear on its devices’ conductBy knowing these broad conditions you can go ahead and rule out suppliers whose capabilities do not measureup to your needs. Legitimate producers of this material will be every bit as transparent as you are planning to in operation sequencing processes so that there’s no chance of mixup.Naturally this wafer will have to be made of the pure material.Second is familiarity with the process, and the supplier you work with must be experienced not only in the material but in its use for power electronics and in its other uses as well. the more experience the supplier has, the better chance of having adequate infrastructure to produce the quality you need.
Understand the Supplier’s Manufacturing Capabilities
The crystal growth process varies, but for many producers the most common approach is to use a sublimation technique like Physical Vapor Transport or Chemical Vapor Deposition. This serves to produce SiC or other crystals of high purity. Study how your supplier controls this process, the specs which are produced, and the faith he
Vendors with clean room facilities and stringent manufacturing controls are more likely to supply high quality wafers. Check the Supplier’s Quality Control and Certification
Quality control is critical in the production of SiC wafers. A defect in the wafer might translate into performance problems in your product. Inquire as to the testing and quality control/”assurance that vendors follow; what governing standards they utilize. ISO9001 indicates quality management; ISO 14001 environmental quality management. Inquire also about the suppliers’ wafer tests; common are surface inspection, thickness measurement, electrical property testing, etc.
Know the Suppliers’ Lead Time and Inventory
Lead time is especially important where tight project deadlines are concerned.
Time required for vendors to deliver SiC wafers will depend on wafer size and number on a wafer, processing, and the vendor’s workload.Inquire About Lead Time for the Wafers You Need
Lead time is always a consideration in wafer purchase, and if the vendor has a large established inventory they will often be able to fill your order much quicker, and with less chance of having gone out of production due to simply not having the necessary parts.
Look Into Cost and Pricing Structure
The cost is usually something you can simply see but it’s not the only reason for selecting a supplier. SiC Wafers can be expensive, especially in the more challenging applications requiring high performance specialty wafers. But a cheap wafer might not be quite so adequate for your application as you’d hoped! Make sure you’re working with a truly up-front supplier who is going to tell you what you’re going to be paying based on what you need, and how many of them! If somebody is trying to sell sheets to you for a lot less than their competitors, something is either wrong, or they may be in some way cutting corners, making sacrifices against quality. A normal decent supplier will have no problem at all showing you exactly why his product is priced as it is, what shipping and handling costs are, and other treatments he may apply to the product.Suppliers Customer Support and Other Technical Help
Decent customer support is a huge consideration, so investigate the supplier’s status in that regard.If you have challenges you’ll want someone that can counsel you, recommend mehodologies and best practices, to work withSiC wafer, et cetera. This is even more of a reason to be wary if you’re only just letting your hands get wet with SiC materials and/or planning a SiC wafer system into something like an EV’s drive train, inverters, and what not. Just be sure to list what support team they’d have and guarantee you quick responsive custom service.
Check References and Reviews
If you’re still in doubt as to whether you should be going with a chosen supplier or not, do you have any reviews or any references you can follow-up on? A decent SiC wafer supplier is going to be more than happy to tee you up with testimonials to facilitate your decision. Better reach out to a few companies that have used their product already, and ask them how their experiences have been with them. This gives you so many insights to the company you’re getting your products from.
Consider Long-Term Relationships
In your evaluations, seek to see whether you might have a relationship you’ll need to maintain over a long period, as it’s clearly of priority to your company that you do have and hold dear such long-lasting relationships that could make you as a brand, or leave you in tatters if it goes too bad. A good SiC wafer supplier can be just that to you, a collaborator in future innovations, a partner for continued product development and improvement in your production needs.
Conclusion
Choosing one and it’s a big portion of a SiC wafer supplier is an important part, not only of your success as a company, but of the product you intend to make and see to market!
Taking the time to evaluate your needs and the capacity of the supplier you intend to with whom you’d like to go with and their reputation gives you clarity know exactly who to choose going forward. With the demand for SiC applications growing day by day, working with a great, recommendable supplier would give you the edge you need in a fast growing industry.