reticle management

**Reticle Management** is the **comprehensive system for tracking, storing, maintaining, and controlling photomasks throughout their production lifetime** — managing inventory, usage history, cleaning schedules, inspection results, and end-of-life decisions to ensure mask quality and availability. **Reticle Management Functions** - **Inventory Tracking**: Track location, status, and availability of every reticle in the fab — RFID or barcode identification. - **Usage Logging**: Record every exposure event — wafer count, total dose, scanner used. - **Maintenance Schedule**: Automated scheduling of cleaning, inspection, and pellicle replacement. - **Contamination Monitoring**: Track haze development, particle accumulation, and pellicle degradation over time. **Why It Matters** - **Availability**: Mask unavailability stops production — management ensures masks are always where they need to be. - **Degradation Tracking**: Masks degrade with use — tracking enables proactive replacement before quality drops. - **Cost Optimization**: Extending mask lifetime reduces costs — but using a degraded mask risks yield loss. **Reticle Management** is **the librarian of the mask vault** — comprehensive tracking and maintenance to ensure every photomask is available, qualified, and performing.