3D printing, also known as Additive Manufacturing (AM), is a revolution in manufacturing techniques based on layer-by-layer fabrication. Thanks to its flexibility, such technique finds application in different areas. Stereolithography is probably the most consolidated 3D printing technology; it was developed in the 1970s and it is based on the curing of a photosensitive blend (namely resin) by laser-scanning. The resin can be structural or functional. The present thesis work is set in the context of the study of a functional resin (electrically conductive) for stereolithography, which was developed in previous works. The printable material is obtained by mixing PEDOT: PSS particles, which is the intrinsically conductive polymer, as a filler with PEGDA matrix and photoinitiator.