TY - CONF AU - Evans, Christopher AU - Parks, R AU - Shao, L AU - Schmitz, Tony AU - Davies, Angela C2 - Metrology, Inspection and Process Control for Microlithography, Conference | 15th | Metrology, Inspection and Process Control for Microlithography XV | SPIE DA - 2001-08-01 LA - en M1 - 4344 PB - Metrology, Inspection and Process Control for Microlithography, Conference | 15th | Metrology, Inspection and Process Control for Microlithography XV | SPIE PY - 2001 TI - Interferometric Testing of Photomask Substrate Flatness ER -