Patent ID: 6884653

Claim:
A method of packaging at least one semiconductor die in a high density arrangement comprising: providing a substrate; providing a flexible interposer including a first surface having a plurality of electrical contacts thereon for electrically connecting at least one semiconductor die to a substrate, a second surface, and a plurality of open vias extending completely through said flexible interposer from said first surface to said second surface; providing at least one bare unpackaged semiconductor die having a plurality of bond pads on a first surface thereof; providing a plurality of electrical contacts; attaching said at least one semiconductor die to said flexible interposer forming an intermediate structure, said interposer being folded around said at least one bare unpackaged semiconductor die, said at least one bare unpackaged semiconductor die being in electrical communication with said substrate through a portion of the plurality of electrical contacts of said flexible interposer by at least a portion of the plurality of electrical contacts filling at least portions of the plurality of vias extending from the first surface of the interposer to the second surface of the interposer contacting a plurality of bond pads on the first surface of the at least one bare unpackaged semiconductor die; and attaching said intermediate structure to said substrate.