Patent ID: 6426468
Filing Date: 2002-07-30
Classification: H01L

Abstract:
A circuit board comprising a substrate for connecting to a semiconductor chip comprising:a plurality of plated through holes, each through hole having an upper end and a lower end, extending through said substrate; wherein said substrate has a first face and a second face; wherein said first face has a plurality of conductor patterns formed thereon for connecting to said semiconductor chip; wherein said conductor patterns include a plurality of adjacent clock lines; a first metallic shield layer formed on said first face between said adjacent clock lines; a ground line connected with said first metallic shield layer; a plurality of terminals formed on a plurality of matrically formed lands formed on said second face; a plurality of second metallic shield layers which respectively enclose said lands; and wherein said upper ends of said through holes are directly connected to said conductor patterns, and said lower ends of said through holes are directly connected to said lands; and wherein said plated through holes each have inner faces coated with plating layers in order to electrically connect said conductor patterns with said lands.