Patent ID: 7038917
Filing Date: 2006-05-02
Classification: H01L,H05K

Abstract:
1. An apparatus comprising a device connected to a circuit board by interconnect elements, said interconnect elements comprising a ball-grid array having at least three rows and three columns of interconnect elements, said circuit board comprising a first conductive layer directly connected to a first plurality of said interconnect elements to form a first termination, said first plurality of interconnect elements forming a first repeating pattern; and a second conductive layer connected to a second plurality of said interconnect elements to form a second termination, said second plurality of interconnect elements forming a second repeating pattern alternating with said first repeating pattern; said first conductive layer defining a first array of laterally non-conductive apertures at locations conforming to the locations of said second plurality of interconnect elements, said first conductive layer otherwise being substantially continuous in an area under said device, said second conductive layer separated from said first conductive layer by insulating material, wherein said second conductive layer is connected to said second plurality of interconnect elements at locations within said laterally non-conductive apertures by conductive connectors which pass through said insulating material, said second conductive layer being substantially continuous in an area encompassing said conductive connectors.