Patent ID: 7732904
Filing Date: 2010-06-08
Classification: H01L

Abstract:
1. An integrated circuit (IC) package assembly for interconnecting and space transforming the I/O terminals from locations on a first IC die within the package assembly to I/O terminal locations distal from the first IC die, comprising: a first circuit layer having a first surface with a first plurality of conductive paths disposed thereupon, including a first conductive path extending from an interior IC package terminal disposed on a first exposed region of the first surface to an exterior IC package terminal disposed on a second exposed region of the first surface; and a second circuit layer having a second surface with a second plurality of conductive paths disposed thereupon, including a second conductive path extending from an interior IC terminal disposed on a first exposed region of the second surface to an exterior IC package terminal disposed on a second exposed region of the second surface, wherein a portion of the first conductive path is covered by the second circuit layer, the first exposed regions of the first and second surfaces are arranged in stair step structure, and the second exposed regions of the first and second surfaces are arranged in stair step structure.