We investigate the chemical dissolution rate of PMMA resist (polymethylmeth
acrylate) in the case of deep x-ray lithography with the aim of intentional
ly producing microstructures with inclined side walls. This can be achieved
by controlling the dose distributions and their related dissolution rates
in both exposed and shaded areas. We specialize in the fabrication of pyram
idal microstructures using thin mask absorber patterns. Controlling dissolu
tion conditions in the developer bath such as bath temperature or stirring,
microstructure aspect ratios are investigated.