概要（Overview）

In February 2006, KLA introduced the SpectraCD-XT—our fourth-generation of inline optical CD metrology systems for advanced patterning process control at the 90nm and 65nm nodes. SpectraCD-XT is a non-destructive dedicated CD and profile metrology system built on our high-throughput, production-proven Archer platform. The tool is the only high performance spectroscopic ellipsometry (SE)-based