Phenolic Resin Circuit Board Substrate
Thin, noncellular phenolic resin sheets serving as base substrates for printed circuit boards before copper lamination. Classified under HTS 3920.94.00.00 as unreinforced phenolic sheets, not yet combined with metal layers.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If already laminated with copper foil
Sheets combined with other materials like metal foil fall under 'of polymers of ethylene' or specific combos.
If cellular phenolic foam sheets
Cellular structure changes classification to heading 3921 for non-rigid plastic plates.
If primarily paper-based phenolic laminate
Paper-impregnated phenolics often classified in Chapter 48 as composite paper products.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Declare as 'paper phenolic' if paper-impregnated, but pure resin sheets stay here
• Include FTIR spectroscopy to prove phenolic resin composition per Chapter 39 notes
Related Products under HTS 3920.94.00.00
Phenolic Film for Electrical Insulation
Thin noncellular phenolic resin films (under 0.2mm thick) used for coil wrapping and electrical insulation. Falls under HTS 3920.94.00.00 as plastic film of phenolic resins, not reinforced.
Cast Phenolic Foil for Tooling
Ultra-thin (film/foil thickness) cast phenolic resin sheets for precision tooling and shims. Noncellular and unsupported, classified under HTS 3920.94.00.00 for phenolic foils.
Phenolic Paper Composite Sheet
Phenolic resin sheets impregnated with paper for industrial applications like transformer pressboard. Borderline classification under HTS 3920.94.00.00 if resin predominant and non-laminated.
Phenolic Resin Bakelite Sheet
A rigid, noncellular sheet made from phenolic resins, commonly known as Bakelite, used for electrical insulation and mechanical parts. It falls under HTS 3920.94.00.00 as it is a plate, sheet of phenolic resins, noncellular and not reinforced or combined with other materials.
Phenolic Resin Gear Blank
Machinable flat sheets or strip forms of phenolic resin used to cut gears and mechanical components. HTS 3920.94.00.00 covers these noncellular, unreinforced forms prior to machining into parts.
Phenolic Resin Tabletop Laminate Base
Large format phenolic resin sheets used as core material in decorative laminates for countertops. Classified in HTS 3920.94.00.00 before final decorative overlay application.