2853.90.90.10 - Gallium arsenide wafers, undoped

This HTS classification, 2853.90.90.10, specifically covers undoped gallium arsenide wafers. Gallium arsenide (GaAs) is a compound semiconductor material widely used in high-speed electronics, optoelectronics, and radio frequency applications. Wafers are thin, circular discs of this material that serve as the substrate for manufacturing integrated circuits and other semiconductor devices. The "undoped" designation is crucial, indicating that the wafers have not had intentional impurities added to alter their electrical conductivity, thereby distinguishing them from doped GaAs wafers which would fall under different classifications.

This subcategory is distinct from its sibling category, 2853.90.90.90, which encompasses all "other" inorganic compounds not otherwise specified. While both fall under the broader heading for "other inorganic compounds," 2853.90.90.10 is a specific, dedicated classification for undoped gallium arsenide wafers, reflecting their unique properties and established use in specialized manufacturing processes. This specificity allows for more accurate tariff application and statistical tracking of this particular type of semiconductor material.

As this is a leaf node, there are no further subcategories to introduce. The classification ends here, meaning that undoped gallium arsenide wafers, regardless of minor variations in size or purity that do not fundamentally alter their classification as undoped GaAs wafers, will be entered under this HTS code. Classification decisions at this level rely heavily on the precise material composition (gallium arsenide) and the condition of the material (undoped wafers).