Patent ID: 6479319
Filing Date: 2002-11-12
Classification: H01L

Abstract:
A method for electrically connecting a substrate to an integrated circuit having differential pairs of signals that are associated with differential pairs of integrated circuit contacts on the integrated circuit, the method comprising the steps of:disposing differential pairs of substrate contacts on a first substrate layer of the substrate in a staggered array and in alignment with the differential pairs of integrated circuit contacts, making electrical connections between the differential pairs of substrate contacts and the differential pairs of integrated circuit contacts, receiving the differential pairs of signals from the integrated circuit through the differential pairs of integrated circuit contacts, sending the differential pairs of signals to the integrated circuit through the differential pairs of integrated circuit contacts, disposing differential pairs of vias on the first substrate layer and extending to at least one underlying substrate layer, disposing each via within a given one of the differential pairs of vias within a column with each other on the first substrate layer, where the columns for each of the differential pairs of vias are in a substantially parallel arrangement one with another, making electrical connections between the differential pairs of vias and the differential pairs of substrate contacts, receiving the differential pairs of signals from the integrated circuit through the differential pairs of substrate contacts, sending the differential pairs of signals to the integrated circuit through the differential pairs of substrate contacts, disposing differential pairs of traces on the at least one underlying substrate layer, disposing each trace within a given one of the differential pairs of traces adjacent each other and routed to a peripheral portion of the at least one underlying substrate layer in a substantially side by side arrangement, making electrical connections between the differential pairs of traces and the differential pairs of vias, receiving the differential pairs of signals from the integrated circuit through the differential pairs of vias, and sending the differential pairs of signals to the integrated circuit through the differential pairs of vias.