Patent ID: 9418888
Filing Date: 2016-08-16
CPC Classification: B81C,H01L

Claim Text:
1. A fabrication method comprising: forming a directed self assembly alignment promotion layer over a surface of a substrate having a first patterned region and a second patterned region, the forming of the directed self assembly alignment promotion layer including forming a first directed self assembly alignment promotion material selectively over the first patterned region, the forming of the first directed self assembly alignment promotion material selectively over the first patterned region performed without using lithographic patterning; and forming an assembled layer over the directed self assembly alignment promotion layer by directed self assembly, the forming of the assembled layer including forming a plurality of assembled structures that each include predominantly a first type of polymer over the first directed self assembly alignment promotion material and that are each adjacently surrounded by predominantly a second different type of polymer over the second patterned region, the first directed self assembly alignment promotion material having a greater chemical affinity for the first type of polymer than for the second different type of polymer.