5-inch Semi-Insulating SiC Wafer (Chromium-Doped) from China
5-inch high-resistivity silicon carbide wafer chromium-doped for semi-insulating properties in RF GaN devices. Under HTS 3818.00.00.30 as specialty doped electronic wafer. Critical for low-loss microwave amplifiers.
Duty Rate — China → United States
50%
Rate breakdown
9903.91.0550%Effective with respect to entries on or after January 1, 2025, articles the product of China, as provided for in subdivision (f) of U.S. note 31 to this subchapter
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Resistivity >10^9 ohm-cm cert mandatory; lower values reclassify
• Trap density reports prevent disputes over 'doped for electronics' claim