Patent ID: 7795735
Filing Date: 2010-09-14
Classification: H01L,Y10T

Abstract:
1. A method for forming a single die, comprising: forming at least one first active device over a first substrate and at least one first metallic layer coupled to the first active device and extending above a top surface of a top dielectric layer of the first substrate, said forming including performing front-end-of-line processing (FEOL) steps on the first substrate without performing back-end-of-line (BEOL) processing on the first substrate; forming at least one second metallic layer extending over an exposed substrate surface of a second substrate, wherein the second substrate does not include any active device, and the step of forming at least one second metallic layer includes performing BEOL processing steps but no FEOL processing steps on the second substrate; forming at least one through-silicon-via (TSV) structure in the second substrate; and bonding the at least one first metallic layer with the at least one second metallic layer using fusion, such that the first substrate and the second substrate constitute a single die.