Patent ID: 8669139

Claim:
A method comprising: providing a first die, wherein the first die includes a plurality of first bond pads; wire-bonding selected first bond pads to a first side of a leadframe; mounting a second die on the first die, wherein the second die includes a plurality of second bond pads; wire-bonding selected second bond pads to a second side of the leadframe, wherein the first side of the leadframe is opposite to the second side of the leadframe; and forming an underfill material between the first die and the second die, wherein the underfill material is configured to absorb thermal expansion stresses between the second die and the leadframe, wherein at least part of a side of the second die is mounted on the first die such that only underfill material is between (i) at least part of the second die and (ii) at least part of the first die, and wherein at least part of the side of the second die is mounted on the leadframe.