barcode tracking

**Barcode tracking** is the **optical identification method for reading carrier and lot IDs during material movement and tool loading events** - it provides a low-cost, widely compatible foundation for traceability in semiconductor operations. **What Is Barcode tracking?** - **Definition**: Use of machine-readable barcode labels to encode FOUP and lot identity. - **Deployment Context**: Applied at manual stations, hand scanners, and fixed scan points. - **Data Function**: Confirms identity at transfer, storage, and processing checkpoints. - **System Role**: Often used as primary or backup channel alongside RFID. **Why Barcode tracking Matters** - **Traceability Baseline**: Ensures every carrier movement can be linked to a validated identifier. - **Operational Simplicity**: Mature standards and tooling make implementation straightforward. - **Exception Recovery**: Provides fallback when RFID reads fail or are unavailable. - **Cost Efficiency**: Low infrastructure cost supports broad deployment coverage. - **Compliance Support**: Scan logs strengthen audit trails for lot history and disposition. **How It Is Used in Practice** - **Label Governance**: Standardize code format, placement, and print quality controls. - **Scan Enforcement**: Require barcode verification at critical handoff and load points. - **Error Handling**: Trigger hold and reconciliation workflow for unreadable or mismatched codes. Barcode tracking is **a practical identity-control layer for fab logistics** - consistent scan discipline protects chain-of-custody, reduces misrouting risk, and supports reliable lot traceability.