Spacer defined double patterning for sub-72 nm pitch logic technologyRyoung-Han KimErin McLellanet al.2010SPIE Advanced Lithography 2010
Overcoming the challenges of 22-nm node patterning through litho-design co-optimizationMartin BurkhardeJ.C. Arnoldet al.2009SPIE Advanced Lithography 2009