Patent ID: 8907494
Filing Date: 2014-12-09
Classification: H01L

Abstract:
1. A semiconductor chip including a semiconductor substrate, the semiconductor substrate comprising: a first major surface in which a semiconductor device has been formed, a second major surface opposite to said first major surface, said second major surface created by thinning said semiconductor substrate, a through-silicon-via (TSV) extending between the first and the second major surface, and bulk micro defects (BMD) having an average size less than 55 nm (nanometers) within a first region of said semiconductor substrate, said first region being within ten microns of said second major surface, said BMD having a density greater than 1e4/cc (particles per cubic centimeter) and less than 1e7/cc throughout a second region traversed by the TSV, said second region extending between the first and the second major surface.