Patent ID: 7514340

Claim:
A method for making a composite integrated device, comprising: providing a first integrated device having a substrate, an overlying interconnect region, and a contact, wherein the contact electrically contacts the interconnect region; forming a first dielectric layer over a surface of the first integrated device; forming a first opening in the first dielectric layer to expose the contact of the first integrated device; forming a sidewall spacer along a sidewall of the first opening; providing a deformable metal feature adjacent to the sidewall spacer and in the first opening, so that the deformable metal feature electrically contacts the contact of the first integrated device and extends above the first dielectric layer; removing the sidewall spacer; providing a second integrated device having a second substrate, a second overlying interconnect region, a second contact, and a second dielectric layer surrounding the second contact of the second integrated device, wherein the second contact of the second integrated device electrically contacts the second interconnect region of the second integrated device; contacting the second contact of the second integrated device with the deformable metal feature; and pressing the first dielectric layer against the second dielectric layer to bring about bonding the second contact of the second integrated circuit to the deformable feature and bonding the second dielectric layer to the first dielectric layer.