With standard tools this should be easily attainable. Typical aspect ratios of 1:20 can be achieved with a suitable mask aligner, 1:100 has been reported with more advanced techniques. Take a look at the following link for more info and a good overview of SU-8: http://memscyclopedia.org/su8.html Peng Li (Paul) wrote: > Dear all, > > Is that possible to make a 200 um depth and 50 um width mold via SU-8? > What's the maximum attainable aspect ratio via SU-8 molding? > Looking forward to hearing from you guys! > > Thanks! > > Peng Li > >