Self-limited self-perfection by liquefaction for sub-20nm trench/line fabrication

Yixing Liang, Patrick Murphy, Wen Di Li, Stephen Y. Chou

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We proposed and demonstrated a new approach to pressed self-perfection by liquefaction (P-SPEL), where a layer of SiO2 is used as a stopper on one sidewall of gratings, to self-limit the final trench width in P-SPEL to a preset stopper layer thickness, allowing a precise control of the final trench width without the need to control any pressing parameters such as pressure, temperature and the gap between the pressing plate and the substrate. We achieved 20nm wide trenches from a 90nm original width, reducing the original trench by 450%. We also observed improvement in the trench width uniformity. Using the fabricated resist trenches as templates, 20nm metal lines were achieved by lift-off.

Original languageEnglish (US)
Article number465305
Issue number46
StatePublished - 2009

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Mechanics of Materials
  • Mechanical Engineering
  • Bioengineering
  • Electrical and Electronic Engineering
  • General Materials Science


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