Patent ID: 6222740
Filing Date: 2001-04-24
Classification: H05K,Y10S,Y10T

Abstract:
A multilayer circuit board having a first outer side and a second outer side, comprising:a plurality of insulating material layers including at least a first outer insulating material layer and a second outer insulating material layer;a plurality of conductor path planes extending in a direction parallel to the plurality of insulating material layers and arranged one above another and being separated from each other by the plurality of insulating material layers;at least one electronic component situated on one of the first outer side and the second outer side;at least one core substrate arranged between the first outer insulating material layer and the second outer insulating material layer, the at least one core substrate adapting a plurality of thermal expansion properties of the multilayer circuit board, at least in a coverage area of the at least one electronic component, to a plurality of thermal expansion properties of the at least one electronic component; andan inner layer portion having a recess, the inner layer portion being situated between the first outer insulating material layer and the second outer insulating material layer, and including printed circuit traces which extend in a direction parallel to the first outer insulating material layer and the second outer insulating material layer, the recess having a lateral extent confined substantially to the coverage area of the at least one electronic component, wherein the at least one core substrate is arranged within the recess.