Patent ID: 6445591
Filing Date: 2002-09-03
Classification: H01L,H05K,Y10T

Abstract:
An improved multilayer circuit board for enabling the stacking of electronic components, the multilayer circuit board having a first electrically conductive layer and a second electrically conductive layer separated by at least one dielectric layer, wherein the second electrically conductive layer is disposed beneath the first electrically conductive layer and the at least one dielectric layer within the multilayer circuit board, the improvement comprising:a cavity in the multilayer circuit board extending through the first electrically conductive layer and the at least one dielectric layer so as to expose at least a portion of the second electrically conductive layer within the cavity, wherein the cavity is sized to accommodate a first electronic component therein such that the first electronic component makes electrical contact with the exposed portion of the second electrically conductive layer and a second electronic component, which is stacked over the first electronic component, makes electrical contact with the first electrically conductive layer, wherein at least the lateral dimensions of the cavity are sized to directly coincide with at least the lateral dimensions of the first electronic component.