Patent ID: 9530688
Filing Date: 2016-12-27
CPC Classification: H01L

Claim Text:
1. A method comprising: forming an opening in a hardmask layer over a dielectric layer, the hardmask layer having a bottommost surface and an uppermost surface; introducing a block copolymer in the opening in the hardmask layer; assembling the block copolymer to form a plurality of assembled structures that are spaced along a length of the opening in the hardmask layer, wherein the plurality of assembled structures is confined to and co-planar with the opening in the hardmask layer and has a bottommost surface co-planar with the bottommost surface of the hardmask layer and has an uppermost surface co-planar with the uppermost surface of the hardmask layer; forming an opening through an assembled structure of the plurality of assembled structures; forming a first opening in the dielectric layer, the first opening having a cross-sectional dimension that is based on a cross-sectional dimension of the opening through the assembled structure; subsequent to forming the first opening in the dielectric layer, forming a second opening in the dielectric layer by using the opening in the hardmask layer as a mask; and subsequent to forming the second opening in the dielectric layer, filling the first and second openings in the dielectric layer with a conductive material.