BT Resin Molding Compound Base from Mexico
Unfilled bismaleimide resin base for encapsulation compounds, classified under HTS 3911.90.35.00 as specified thermosetting copolymer. Provides ultra-low CTE matching silicon. Primary form before filler addition.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify 'unfilled resin' status to avoid 3901 classification with fillers
• Gel permeation chromatography may be required for copolymer verification
• Pitfall: premature classification as finished molding compound