A package for a semiconductor device includes a base having a flat surface with an edge of a predetermined shape for abutting against a similar edge of another object. Conductors are placed on the flat surface of the base and extend to but do not overlap the edge of predetermined shape. The base along...http://www.google.es/patents/US5014115?utm_source=gb-gplus-sharePatente US5014115 - Coplanar waveguide semiconductor package
