B PERFORMING OPERATIONS; TRANSPORTING
B81 MICROSTRUCTURAL TECHNOLOGY
B81B MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
2203/00 Basic microelectromechanical structures
B81B2203/01 Suspended structures, i.e. structures allowing a movement
B81B2203/0127 Diaphragms, i.e. structures separating two media that can control the passage from one medium to another; Membranes, i.e. diaphragms with filtering function