Patent ID: 7745920

Claim:
A packaged microelectronic device, comprising: a support member; a first microelectronic die attached to the support member; a second microelectronic die having an active side and a back side opposite the active side, wherein the second die is attached to the first die in a stacked configuration; and an attachment feature between the first and second dies and attached to each of the first and second dies, wherein the attachment feature is composed of a dielectric adhesive material, and wherein the attachment feature includes (a) a single, unitary structure covering at least approximately all of the back side of the second die, and (b) a plurality of interconnect structures electrically coupled to internal active features of both the first die and the second die, wherein the attachment feature comprises an at least initially generally flexible film attached to the back side of the second die and having a plurality of preformed openings extending completely through the film, and wherein the interconnect structures are formed in at least a portion of the openings.