Prime Grade device-quality Silicon Wafers in Stock

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Prime Grade Silicon Wafers

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.

We also have are very large selection of test grade silicon wafers.

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prime grade, test grade, mechanical grade silicon wafers

What are Silicon Wafer Grades?

Silicon wafers are available in different grades (quality levels):

Prime Grade Silicon Wafers

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

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.

One of our best selling test grade wafers is the following item:

Item #452 - 100mm P(100) 0-100 ohm-cm SSP 500um

Buy as few as ONE WAFER!

Mechanical Grade Silicon Wafers

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.

Silicon Wafer Diameters in millimeters/inches Include:

Silicon wafer Types/dopants inlcude:

  • P-Type – Boron Doped and Gallium Doped (Czochralski (CZ) Grown)
  • N-Type – Phosphorous Doped, Arsenic Doped and Antimony Doped (CZ Grown)
  • Undoped/Intrinsic are FZ or Float Zone Grown and are of high-resistivity and more expensive than CZ grown


The measure of a material's resistance to electric current flow.

What is the Difference Between SEMI Prime and Prime Grade Silicon Wafers?

  1. Question: What is the difference between SEMI prime and prime?  Any quantified property difference between the two?
  2. Answer: No difference. Prime is abbreviation from SEMI Prime. SEMI is organization (see: that constitute requirements for Si wafers and Prime (or SEMI Prime) wafers are the ones with the highest quality. (Lower quality wafers are SEMI Test or just Test).

What does Empak Cassette Mean?

  1. What does Empak cst mean?
  2. The box (so called cassette=cst) for wafers is made by Empak company. (just google in pictures: "Empak box"). This is a industry standard box in common use.