Patent ID: 8883649
Filing Date: 2014-11-11
Classification: H01L

Abstract:
1. A method comprising: forming a set of sidewall spacers next to a plurality of mandrels, said set of sidewall spacers being directly on top of a second hard-mask layer; forming a photo-resist block mask, said photo-resist block mask exposing at least a portion of said set of sidewall spacers and covering rest of said set of sidewall spacers; transferring image of said at least a portion of said set of sidewall spacers to said second hard-mask layer to form a device pattern; and transferring said device pattern from said second hard-mask layer to a substrate underneath said second hard-mask layer, including transferring said device pattern to a first hard-mask layer, said first hard-mask layer being underneath said second hard-mask layer and separated from thereof by a planarization layer, said planarization layer being an amorphous carbon layer.