mainframe

The mainframe is the main body of a cluster tool housing the transfer chamber, vacuum system, and module interfaces, serving as the structural and functional core of the equipment platform. Components: (1) Transfer chamber—central vacuum enclosure with robot; (2) Module mounting interfaces—standardized facets with slit valves, utilities connections; (3) Vacuum system—turbo pump, dry backing pump, gauges, isolation valves; (4) Facility connections—electrical, gas panels, cooling water, exhaust; (5) Control electronics—tool controller, motion controllers, safety systems. Mainframe configurations: (1) Single transfer chamber—4-6 module facets typical; (2) Dual transfer chamber—linked via pass-through, 8-12 module positions; (3) Tandem mainframe—two independent transfer chambers sharing factory interface. Design considerations: footprint (cleanroom floor space is expensive), ergonomics (technician access for PM), modularity (add/remove chambers easily), upgradability (accommodate new module types). Facility requirements: electrical power (200-480V, high current for RF/plasma modules), multiple process gas connections, PCW (process cooling water), exhaust (general and toxic). Mainframe controller: sequences all operations—robot moves, slit valve commands, module coordination, wafer tracking. Safety systems: EMO (emergency off), interlocks preventing unsafe states, leak detection. Platform families: equipment vendors offer mainframe platforms (e.g., Applied Materials Centura/Endura, Lam Exelan/Sabre, TEL Tactras) that accept different process module types for manufacturing flexibility.