Patent ID: 9086621
Filing Date: 2015-07-21
Classification: B44C,B82Y,C30B,G03F,H01L

Abstract:
1. A method of forming a row of mutually spaced lithography features on a substrate, the method comprising: forming a trench through a resist layer on the substrate, the resist layer overlying an edge of a hard mask layer on the substrate, by removal of a selected portion of the resist layer, aligned such that the trench has a length lying substantially parallel to the edge, the trench having opposed side-walls of resist and a base including the edge, a portion of the hard mask layer and a portion of the substrate, wherein the edge and a side-wall of the trench define a slot over the substrate, the slot having a width less than a width of the trench, providing a layer of self-assemble block copolymer, having first and second blocks, in the trench, causing the block copolymer to self-assemble to give an ordered layer in the trench, wherein the block copolymer is adapted to form the ordered layer comprising a row of first domains of the first block, self-assembled side-by-side in the slot, alternating with second domain of the second block, and using the ordered layer of block copolymer as a further resist layer for etching the row of mutually spaced lithography features along the slot on the substrate.