Patent ID: 8815497
Filing Date: 2014-08-26
Classification: H01L

Abstract:
1. A method of forming patterns, comprising: forming a semiconductor substrate to comprise a set of electrically conductive structures under a material; forming features across the material in a pattern which sparsely populates a two-dimensional array in two directions wherein the two directions define a plane generally parallel with an upper surface of the semiconductor substrate, the two-dimensional array being aligned relative to the set of electrically conductive structures; forming block copolymer across the features and across a region proximate the features, and then inducing self-assembly of the block copolymer into first and second domains; the pattern from the features being propagated through the self-assembled block copolymer to further populate the two-dimensional array using the first domains of the self-assembled block copolymer; selectively removing the first domains relative to the second domains to form a pattern of openings through the self-assembled block copolymer; transferring a pattern of at least some of the openings through the material to extend the openings to the electrically conductive structures; and forming electrically conductive material within the openings to form electrical contacts extending through the material and to the electrically conductive structures.