Patent ID: 9405201
Filing Date: 2016-08-02
CPC Classification: G03F,H01L

Claim Text:
1. A method comprising: forming a patterned hard mask layer, with a trench formed in the patterned hard mask layer; forming a neutralized layer in the trench, the neutralized layer being homogeneous; dispensing a Bulk Co-Polymer (BCP) coating in the trench, wherein the BCP coating comprises a mix of a first material and a second material different from the first material, and wherein the BCP coating is dispensed over the neutralized layer; treating the BCP coating with a chemical to form a first plurality of strips of the first material and a second plurality of strips of the second material, with the first plurality of strips and the second plurality of strips allocated in an alternating layout, the neutralized layer remaining homogeneous after treating the BCP coating with the chemical; and selectively etching the second plurality of strips, with the first plurality of strips left in the trench.