Spatial Technology is provider of high-performance 3D software subsystems and services for 3D interoperability, modeling, and visualization. MECADTRON uses the core of Spatial's 3D technology, the modeling engine Acis as the basis of its 3D-PCB design technology.
Spatial Technology has written a case study about Mecadtron. You can read the document here.
Homepage of Spatial Technology: www.spatial.com