Patent ID: 9330934
Filing Date: 2016-05-03
CPC Classification: H01L

Claim Text:
1. A method of forming a pattern on a substrate, comprising: forming a homogenous carbon-comprising material directly on a base material; forming a first masking material over the homogenous carbon-comprising material, the first masking material being separated from the homogenous carbon-containing material by a hardmask material; forming primary features in the first masking material and subsequently laterally trimming the primary features utilizing an isotropic plasma etch with an etch chemistry consisting of O utilizing the trimmed primary features to form spaced first features comprising the hardmask material over the homogenous carbon-comprising material; only partially etching into the homogenous carbon-comprising material and forming spaced second features within the homogenous carbon-comprising material which comprise the partially etched homogenous carbon-comprising material and overlying hardmask material; forming spacers along sidewalls of the spaced second features; and etching through the hardmask material of the second features and subsequently etching the homogenous carbon-comprising material to the base material using the spacers as a mask and forming spaced third features comprising the spacers and the homogenous carbon-comprising material.