Fabrication of nano-sized resist patterns on flexible plastic film using thermal curing nano-imprint lithography

Heon Lee, Sunghoon Hong, Kiyeon Yang, Kyungwoo Choi

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)


Due to polymer's excellent flexibility, transparency, reliability and light weight, it is a good candidate material for substrate of devices including organic electronic devices, biomedical devices, and flexible displays (LCD and OLED). In order to build such devices on polymer, nano- to micron-sized patterning must be accomplished. Since polymer materials reacts with organic solvents or developer solutions which are inevitably used in photolithography and cannot bear high temperature (∼140 °C) process for photoresist baking, conventional photolithography cannot be used to polymer substrate. In this research, monomer based thermal curing imprinting lithography was used to make as small as 100 nm dense line and space patterns on flexible PET (polyethylene-terephthalate) film. Compared to hot embossing lithography, monomer based thermal curing imprint lithography uses monomer based imprint resin which consists of base monomer and thermal initiator. Since it is liquid phase at room temperature and polymerization can be initiated at 85 °C, which is much lower than glass temperature of polymer resin, the pattern transfer can be done at much lower temperature and pressure. Hence, patterns as small as 100 nm were successfully fabricated on flexible PET film substrate by monomer based thermal curing imprinting lithography at 85 °C and 5 atm without any noticeable degradation of PET substrate.

Original languageEnglish
Pages (from-to)323-327
Number of pages5
JournalMicroelectronic Engineering
Issue number2
Publication statusPublished - 2006 Feb


  • Benzyl-methacrylate monomer
  • Flexible substrate
  • Hot embossing nano-imprinting lithography
  • Monomer based imprinting lithography
  • PET (polyethylene- terephthalate) film
  • Polymerization
  • Thermal initiator
  • Transparent polymer film

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering


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