Medical displays by using plasma-beam-alignment technology

Chin Yang Lee*, Chi Hung Liu, Chih Wei Chen, Saodo Miki, Huang-Ming Chen, Shermann Lin, Po Hua Su, Chein Dhau Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Novel anode layer plasma within minimum chamber space was developed for non-contact alignment process. The plasma-treated polyimide (PI) surface showed no particle contamination and no micro-scratches. Surface morphology was investigated by using scanning electron microscope (SEM), an atomic force microscope (AFM), and X-ray photoemission spectroscopy. The different oxygen-to-carbon ratio ([O]/[C] ratio) for XPS spectra indicated a composition change after plasma treatment. Surface pretilt angles were varied from 0 to 2.1° under different plasma exposure times. Finally, a prototype 20.8-in. QXCA IPS-mode gray-scale medical liquid-crystal display was successfully demonstrated with high contrast ratio, excellent uniformity, and wide viewing angle using this new plasma-beam-alignment technique.

Original languageEnglish
Pages (from-to)71-75
Number of pages5
JournalJournal of the Society for Information Display
Issue number1
StatePublished - 1 Jan 2008


  • Anode layer plasma
  • Liquid-crystal alignment
  • Plasma beam alignment
  • Polyimide

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