Patent ID: 6552910
Filing Date: 2003-04-22
Classification: H01L

Abstract:
A stacked-die assembly, comprising:a first die having a first integrated circuit and a first terminal array coupled to the first integrated circuit; a second die having a second integrated circuit and a second terminal array coupled to the second integrated circuit, the second die being juxtaposed to the first die; an interface substrate comprising a body, a first contact array on the body and electrically coupled to the first terminal array of the first die, a second contact array on the body electrically coupled to the second terminal array on the second die, at least a first ball-pad array on the body spaced apart from the first and second contact arrays, and interconnecting circuitry electrically coupling at least a portion of the first and second contact arrays with at least a portion of the first ball-pad array, wherein the body has a first section, a second section, and an intermediate section between the first and second sections; the first die has an interior surface and an exterior surface, and the first terminal array being on the exterior surface; the second die has an inner surface and an outer surface, the second terminal array being on the outer surface, and the inner surface of the second die being attached to the interior surface of the first die; the first section of the body has a first contact surface attached to the exterior surface of the first die and a first access surface facing away from the first die, the first contact array being on the first contact surface and engaged with the first terminal array on the first die, and the first ball-pad array being on the first access surface; the second section of the body has a second contact surface attached to the outer surface of the second die and a second access surface facing away from the second die, the second contact array being on the second contact surface and engaged with the second terminal array on the second die; and the interface substrate further comprises a second ball-pad array on the second access surface of the second section of the body.