Patent ID: 9330975
Filing Date: 2016-05-03
CPC Classification: H01L

Claim Text:
1. A method of forming a through-substrate via, comprising: forming a through-substrate via opening to extend only partially elevationally through a substrate from one of two opposing elevationally outermost sides of the substrate, the through-substrate via opening being formed to have a narrower open width on the one elevationally outermost side of the substrate than width of an elevationally innermost portion of the through-substrate via opening most proximate the other of the two opposing elevationally outermost sides of the substrate; depositing a first material to line and narrow the through-substrate via opening; etching the first material to widen both a) an elevationally outermost portion of the narrowed through-substrate via opening on the one elevationally outermost side, and b) an elevationally innermost portion of the narrowed through-substrate via opening most proximate the other of the two opposing elevationally outermost sides of the substrate; and after the etching, depositing a conductive second material to fill the widened through-substrate via opening.