Patent ID: 7105926
Filing Date: 2006-09-12
Classification: H01L

Abstract:
1. A flip chip substrate comprising: a plurality of conductive layers, including a top layer and a bottom layer; a first plurality of contacts, including first and second contacts corresponding to a differential signal pair, which are arranged on the top layer within a die bonding area; a second plurality of contacts, including third and fourth contacts corresponding to the differential signal pair, which are arranged on the bottom layer; and first and second traces routed between the first and third contacts and between the second and fourth contacts, respectively, wherein the second trace is routed out of the die bonding area on a different one of the layers than the first trace and comprises a via in the die bonding area extending from the top layer to another of the plurality of layers, wherein the via is laterally offset from the second contact in a direction toward the first contact.