8534.00.00.20 - With 3 or more layers of conducting materials

This HTS classification, 8534.00.00.20, specifically covers printed circuits that are not flexible, are made with a base wholly of impregnated glass, and crucially, possess three or more layers of conducting materials. These are sophisticated printed circuit boards designed for applications requiring increased circuit density and complexity, such as in advanced electronics, telecommunications equipment, and computing devices. The presence of multiple conductive layers allows for more intricate interconnections between components.

This category is distinguished from its sibling, 8534.00.00.40 ("Other"), by the explicit requirement of having three or more layers of conducting materials. The "Other" category would encompass printed circuits with a glass-impregnated base that do not meet this multi-layer criterion. Therefore, the key differentiating factor is the layered construction of the conductive pathways.

As this is a leaf node in the HTS classification, there are no further subcategories. Classification decisions for this code will rely on confirming the physical characteristics of the printed circuit: the base material being wholly of impregnated glass, the non-flexible nature of the circuit, and the definitive presence of three or more distinct layers of conducting material.