Investigations of the development rate of irradiated PMMA microstructures in deep X-ray lithography
Deep X-ray lithography is a fabrication method for producing microstructure with high aspect ratios using resist layers of 100 ?m to several millimeters. We have measured the development rates of non-crosslinked PMMA microstructures (minimum size 30 ?m diameter) at room temperature for dose values between 2 and 16 kJ/cm3. We used dip development and megasonic supported development (10 W/cm2). The development rates cover three orders of magnitude, and the megasonic supported development rate is about four times larger than that for dip development.
microstructure non-crosslinked pmma dip development megasonic supported development liga process gg developer