Development of a multi-material stereolithography 3D printing device

Additive manufacturing, or nowadays more popularly entitled as 3D printing, enables a
fast realization of polymer, metal, ceramic or composite devices, which often cannot be fabricated
with conventional methods. One critical issue for a continuation of this success story is the
generation of multi-material devices. Whilst in fused filament fabrication or 3D InkJet printing,
commercial solutions have been realized, in stereolithography only very few attempts have been
seen. In this work, a comprehensive approach, covering the construction, material development,
software control and multi-material printing is presented for the fabrication of structural details in
the micrometer range. The work concludes with a critical evaluation and possible improvements.