Component carrier preform and tool

The embodiment of the utility model provides a prefabricated part of a part bearing part, which comprises an overlapping part, a plurality of supporting parts, a plurality of supporting parts and a plurality of supporting parts, wherein the overlapping part is provided with at least one electric insulation layer structure and at least one electric conduction layer structure; an active region comprising an exposed region of at least one electrically conductive layer structure on at least one major surface of the stack; at least one reference reading structure that reads through one side of the at least one main surface of the stack; a tool comprising at least one opening for exposing a readable area of the at least one reference reading structure, and at least one cavity adapted to surround an active area of the component carrier, the at least one cavity being located at a different location than the at least one opening exposing the readable area of the at least one reference reading structure. According to t