1. Multi-Layer Overlay Measurement Recent Developments;Nuriel,2013
2. Smaller, smarter, faster and more accurate: The new overlay metrology;Nelson,2010
3. ITRS Metrology roadmap; http://www.itrs.net/Links/2011ITRS/2011Chapters/2011Metrology.pdf
4. Double patterning for 32nm and below: an update;Jo,2008
5. Overlay target design and evaluation for SADP process