7410.21.30.40 - Having copper on both sides

This HTS category, 7410.21.30.40, specifically covers copper clad laminates that are characterized by having a base material composed entirely of glass impregnated with plastics, and crucially, feature copper on both sides of this base. These laminates are designed for applications where electrical conductivity on multiple surfaces is required, often serving as the foundational material for printed circuit boards (PCBs) and other electronic components.

This classification distinguishes itself from its sibling category, 7410.21.30.20, which covers similar copper clad laminates but only possesses copper on one side of the plastic-impregnated glass base. The presence of copper on both surfaces is a key differentiator, indicating a different set of potential applications and manufacturing processes compared to single-sided copper clad laminates.

As this is a leaf node in the HTS structure, there are no further subcategories under 7410.21.30.40. Therefore, the focus remains on the precise definition of the product: a laminate with a specific type of base (wholly plastics impregnated glass) and the distinct characteristic of having copper on both sides. Classification within this code hinges on verifying these exact material and structural attributes.