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Linewidth Control In Optical Projection Printing: Influence Of Resist Parameters

Photoresist linewidth profiles for optical projection printing with high performance stepper lenses were simulated using the SAMPLE program. Profile slopes and linewidth variations of resist structures on profiled surfaces (silicon and aluminum substrates) have been investigated in dependance on photoresist parameters such as optical absorption coefficient and thickness of the photoresist as well as exposure/development time. The study also discusses the influence of exposure wavelength (g-line vs. h-line vs. i-line) on line edge slope and standing wave effects.