Patent ID: 7253503
Filing Date: 2007-08-07
Classification: H01L

Abstract:
1. A substrate for making a flip chip integrated circuit package, the substrate comprising: a nonconductive sheet defining opposed first and second sheet surfaces, an exposed peripheral side, and a plurality of conductive vias extending between the first and second sheet surfaces; a die pad defining opposed first and second die pad surfaces, the first die pad surface being attached to the second sheet surface; a plurality of leads each defining opposed first and second lead surfaces and opposed first and second lead ends, the first lead surface of each of the leads being attached to the second sheet surface such that the leads at least partially circumvent the die pad, the second lead end of each of the leads being substantially coplanar with the peripheral side of the sheet; and a plurality of traces disposed on the first sheet surface, each of the traces having a first trace end which is substantially coplanar with the peripheral side of the sheet and a second trace end which terminates in a metal land, each of the traces being electrically connected to a respective one of the leads by a respective one of the conductive vias which each electrically communicate with a respective one of the traces between the first and second trace ends thereof.