8543.90.12.00 - Of physical vapor deposition apparatus of subheading 8543.70

This HTS classification specifically covers parts and components that are integral to apparatus designed for physical vapor deposition (PVD). PVD is a process used to deposit thin films of material onto a substrate, often in a vacuum environment, to alter surface properties or create functional layers. Examples of such parts could include sputtering targets, evaporation sources, vacuum chamber components specifically designed for PVD processes, or specialized tooling unique to PVD equipment. The classification is tied to subheading 8543.70, which encompasses electrical machines and apparatus having individual functions, not elsewhere specified or included.

This category is distinct from its sibling categories by its precise focus on parts for PVD apparatus. The sibling category "Assemblies and subassemblies for flight data recorders..." clearly pertains to entirely different types of equipment and their specific components. The sibling "Other:" is a residual category for parts not falling under more specific descriptions at this level. Therefore, 8543.90.12.00 is reserved for those components that have a direct and identifiable role within the operation of physical vapor deposition machinery.

As this is a leaf node in the HTS classification, there are no further subcategories under 8543.90.12.00. Classification at this level requires a thorough understanding of the apparatus from which the part originates and confirmation that the part's function is specifically related to the physical vapor deposition process. Detailed product literature and technical specifications are crucial for accurate classification.