Patent ID: 6407344
Filing Date: 2002-06-18
Classification: H01L,H05K

Abstract:
A multilayer circuit board for mounting thereon an electronic part provided with electrodes formed in a certain pattern, which comprisesa plurality of laminate routing layers, each of the routing layers being provided with lands and routing lines on its surface, the lands being arranged in a region of the circuit board to conform to the pattern of the electrodes of the electronic part, having vias going through each routing layer for electrical conduction from one side to the other side of the routing layer, wherein electrical contact can be made between adjacent routing layers, and each routing line being connected at its end to a land, and being routed toward the outside of the region where the lands are arranged, wherein the lands on each of the routing layers are arranged to have a pattern in which a closed virtual line is formed by consecutively linking the peripheral lands of the pattern which closed virtual line includes a concave section oriented inward.