Patent ID: 9105478
Filing Date: 2015-08-11
Classification: G03F,H01L

Abstract:
1. A method comprising: obtaining an intermediate semiconductor device, comprising: growing an epi layer over the substrate; forming a doped layer below the epi layer; depositing a first oxide layer on the epi layer; applying a dielectric material on the first oxide layer; depositing a lithography stack on the dielectric material; etching the lithography stack to form at least one mandrel; applying a spacer layer over the at least one mandrel; etching the spacer layer to form at least one spacer; removing the at least one mandrel; etching the dielectric material to form at least one dielectric mask; removing the at least one spacer; etching at least one fin using the at least one dielectric mask; applying a mask stack over the at least one dielectric mask; performing a first lithography on the mask stack to form a first pattern; etching the semiconductor device to form at least one first cut mask; performing a second lithography on the mask stack to form a second pattern; and etching the semiconductor device to form at least one second cut mask.