Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics

Every line of heading 3818

• 3818.00.00 Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics: General Free; Special none; Column 2 25%.
• 3818.00.00.10 Gallium arsenide wafers, doped (kg).
• 3818.00.00.20 Polycrystalline silicon wafers, doped (kg).
• 3818.00.00.30 Silicon carbide wafers, doped (kg).
• 3818.00.00.40 Round (circular) shaped, as described in statistical note 2 to this chapter (kg).
• 3818.00.00.45 Pseudo-square or rectangular in shape, as described in statistical note 3 to this chapter (kg).
• 3818.00.00.50 Other (under: Monocrystalline silicon wafers, doped) (kg).
• 3818.00.00.91 Other (under: Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics) (kg).

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.