Patent ID: 9281212
Filing Date: 2016-03-08
CPC Classification: C23C,G03F,H01L

Claim Text:
1. A process for patterning a hard mask material with line-space patterns below a 30 nm pitch and a 15 nm critical dimension by employing a spin-on titanium silicon (TiSi) material as a tone inversion material, comprising: patterning an organic planarization (OPL) layer over a hard mask material with a line-space pattern below the 30 nm pitch and the 15 nm critical dimension; formulating, filling, and overcoating the spin-on TiSi material into a patterned OPL layer; etching back an excessive spin-on TiSi material, the excessive spin-on TiSi material overcoating the patterned OPL layer; extracting the patterned OPL layer to achieve an inverted pattern; and etching the inverted pattern into the hard mask material; wherein: the spin-on TiSi material includes a silicon-containing recurring unit and a titanium-containing recurring unit; and the spin-on TiSi material has a molecular weight in a range from 500 to 1500.