We have a large selection of prime grade silicon wafers for research and production. We have ultra-thin silicon 5 micron thin to silicon wafer pucks 10mm thick. All orientation and resistivities, both highly doped and low doped specifications.
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Prime grade silicon wafers can be used for everything up to and including production. Integrated circuits found in computer chips are made with prime grade silicon wafers. Prime grade silicon wafer tolerances are much tighter than other lower grades with Total Thickness Variation as tight as 1 micron. Primce grade Si have the lowest particle count.
Test grade silicon wafers are often used by university researchers to hone their skills. The are much less expensive than Prime Grade while of much higher quality than mechanical grade silicon wafers. But compared to prime grade silicon, test grade tolerances are much looser.
Mechanical grade silicon wafers are great for spin-coating, training and any semiconductor process including equipment testing and process testing. Student researchers often use mechanical grade silicon wafers to save money.