Circuit substrate, especially a multilevel circuit board for SMD components, comprising conductive structures on or within insulating layers

摘要

A circuit substrate, comprising conductive structures on or within insulating layers, also has an optical layer (1) embedded at both sides in the layers (6, 7).- DETAILED DESCRIPTION - Preferred Features: An electrically conductive polymer layer, circuit board layers (6, 7) and/or a thermally conductive prepreg layer may adjoin one or each side of the optical layer. The optical layer is in the form of a multimode waveguide