Definition
A reticle inspection system images or scans a photomask and compares measured signals with a neighboring die or design reference so that printable pattern defects, particles, registration errors, and process excursions can be reviewed and dispositioned.
Process position
Inputs
- Completed reticle
- Design or die reference
- Inspection recipe
- Defect-classification limits
Outputs
- Defect map
- Review images
- Disposition record
- Repair or re-clean request
How it works
- 01Load and identify reticle
- 02Align to reference
- 03Scan at selected sensitivity
- 04Detect and classify candidates
- 05Review and disposition defects
Role in the production flow
Reticle inspection controls a high-leverage replication risk: a defect on the master can appear repeatedly on every exposed field. Recipes therefore trade sensitivity and throughput while review separates actionable defects from nuisance signals.
An optical or electron-based inspection system used to find pattern, particle, registration, and blank defects before a reticle transfers them to wafers.
Boundary: The cited manufacturers document the equipment category and its intended uses; this record does not independently validate vendor performance claims or rank products.
Qualification and production boundaries
Qualification must match reticle type, absorber and substrate stack, pattern scale, inspection mode, expected defect classes, printability criteria, and the repair and verification flow.
Qualification must match reticle type, absorber and substrate stack, pattern scale, inspection mode, expected defect classes, printability criteria, and the repair and verification flow.
Boundary: Actual acceptance limits, recipes, throughput, availability, and ownership economics are product-, process-, site-, and contract-specific.
Sources
Citations support the tagged claims above. Access dates record when Maha Strategies last checked the public source.
- [1]Annual Report: Process Control and Yield Management · KLA · 2024 · accessed 2026-08-13
- [2]Annual Report: Inspection, Metrology, and Yield Analysis · KLA · 2019 · accessed 2026-08-13