PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS (making microcapsules or microballoons B01J13/02; processes or apparatus peculiar to the manufacture or treatment of piezoelectric, electrostrictive or magnetostrictive element per se H10N30/01)

Description

B81C covers manufacturing and treatment processes specifically designed for microstructural devices and systems, typically encompassing micromachining, lithography, deposition, etching, and assembly techniques used to create microscale structures. This classification includes apparatus and methods for producing components with feature dimensions generally in the micrometer to nanometer range, such as microelectromechanical systems (MEMS), microfluidic devices, and integrated microstructures. It excludes general semiconductor manufacturing (covered under H01L) and focuses on the specialized processes and equipment required when the dimensional precision, aspect ratios, or structural complexity demand techniques beyond conventional manufacturing. Related technologies within B81C include bulk micromachining, surface micromachining, wafer bonding, and the integration of multiple microstructural components into functional systems.