Patent ID: 6911736

Claim:
A package substrate adapted to receive at least one subject integrated circuit having a subject contact pattern, where the subject integrated circuit is selected from a design set of integrated circuits, the package substrate comprising: an upper surface having electrically conductive bump contacts in a bump array, where the bump array is configured to provide electrical connections to all possible integrated circuit contact patterns in the design set of integrated circuits, a lower surface having electrically conductive ball contacts in a ball array, where one each of the bump contacts is electrically connected to one each of the ball contacts through the package substrate, an electrically conductive ground plane disposed between the upper surface and the lower surface, and grounding contacts disposed adjacent the ball contacts, where the grounding contacts are electrically connected to the ground plane, the grounding contacts adapted to electrically short a given ball contact to the ground plane when the bump contact electrically connected to the given ball contact is not used by the subject contact pattern of the subject integrated circuit, and wherein there is one each of the grounding contacts associated with one each of the ball contacts.