Patent ID: 8916337
Filing Date: 2014-12-23
Classification: G03F,H01L,Y10T

Abstract:
1. A method of forming a structure comprising: forming a stack including at least a dielectric material layer and a first metallic hard mask layer; patterning said first metallic hard mask layer with at least one line pattern; forming at least a second metallic hard mask layer over said patterned first metallic hard mask layer; depositing a first organic planarization layer (OPL) over said second metallic hard mask layer; transferring a first lithographic pattern through said first OPL into said second metallic hard mask layer by a first etch; removing said first OPL from above said second metallic hard mask layer; depositing a second OPL over said second metallic hard mask layer; transferring a second lithographic pattern through said second OPL into said second metallic hard mask layer by a second etch, wherein a first composite pattern including said first lithographic pattern and said second lithographic pattern is formed in said second metallic hard mask layer; and transferring a second composite pattern including an intersection of said first composite pattern and said at least one line pattern into said dielectric material layer.