7017.10.30.00 - Quartz reactor tubes and holders designed for insertion into diffusion and oxidation furnaces for production of semiconductor wafers

This HTS category, 7017.10.30.00, specifically covers quartz reactor tubes and holders intended for use within diffusion and oxidation furnaces in the semiconductor manufacturing process. These articles are precisely engineered from fused quartz or other fused silica to withstand the high temperatures and corrosive environments characteristic of wafer fabrication. Their primary function is to house semiconductor wafers during critical stages of their production, ensuring purity and uniformity.

Distinguishing this category from its sibling, 7017.10.60.00 ("Other"), is crucial. While both fall under the broader umbrella of laboratory, hygienic, or pharmaceutical glassware of fused quartz, this specific subheading is limited to items with a defined industrial application in semiconductor manufacturing. The "Other" category would encompass a wider array of fused quartz glassware for laboratory, hygienic, or pharmaceutical uses not directly related to semiconductor wafer production.

As this is a leaf node, there are no further subcategories. Classification within this subheading relies on the explicit identification of the article as a quartz reactor tube or holder designed for semiconductor diffusion and oxidation furnaces. The material composition (fused quartz or fused silica) and the intended end-use are the defining criteria for correct classification here.