what is wfib factory interface mainframe slit valve automation

This is the WAFER-HANDLING AUTOMATION that moves wafers into and through the tool. WFIB = the Wafer/Factory Interface Bridge — connects the tool to the factory. FACTORY INTERFACE = the front-end load station where wafers come in. MAINFRAME = the central transfer chamber where the robots move wafers between stations. SLIT VALVE = the gate that opens/closes to isolate chambers from each other and from the atmosphere. WHY THEY MATTER: 1) THROUGHPUT — the automation moves wafers efficiently. 2) CONTAMINATION ISOLATION — the slit valve keeps clean chamber vacuum separate from atmosphere and prevents cross-contamination between chambers. The key line: 'The automation moves wafers and the slit valves keep the clean environment isolated — a broken robot or a leaking slit valve means downtime or contamination.' Your round-2 history asked all of these — know what each does and the two reasons they matter.