alarm management

Alarm management monitors and responds to tool alarms via automation systems, minimizing impact of faults on production and safety. Alarm sources: equipment hardware faults, process deviations, safety interlocks, facility system issues. Alarm interface: SECS/GEM Stream 5 messages (S5F1 alarm report, S5F3 enable/disable alarms). Alarm attributes: alarm ID, alarm code, alarm text description, alarm severity, timestamp, associated data. Alarm severity levels: (1) Critical—immediate safety concern, tool stops; (2) Warning—requires attention but processing can continue; (3) Information—notable event, no action required. Alarm management workflow: (1) Detection—equipment detects fault condition; (2) Annunciation—alarm sent to host, displayed to operator; (3) Diagnosis—troubleshooting using alarm code and context; (4) Response—corrective action (clear, abort, technician dispatch); (5) Resolution—fault corrected, alarm cleared; (6) Documentation—alarm logged with disposition. Alarm analysis: Pareto analysis of frequent alarms, false alarm identification, alarm correlation (multiple alarms from single root cause). Alarm reduction: excessive alarms cause operator overload (alarm fatigue)—rationalize alarm set, tune thresholds. Integration with FDC: alarms trigger wafer hold for review. Critical for maintaining safe operations and quick response to equipment issues affecting yield and uptime.