Cm. Yuan et V. Pol, COMPARISONS OF ATTENUATED PSM TECHNOLOGIES USING ETCHED QUARTZ AND EMBEDDED MATERIALS, Microelectronic engineering, 27(1-4), 1995, pp. 251-253
Two techniques, etched quartz and embedded materials, are commonly use
d today to fabricate attenuated phase shift masks (PSMs). This paper p
resents measurement results on the masks and wafers to compare their l
ithography performance.