Medical displays by using plasma‐beam‐alignment technology

Abstract

Abstract— 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. QXGA 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.

Multiple Alignment Modes for Nematic Liquid Crystals Doped with Alkylthiol-Capped Gold Nanoparticles

“…One prominent technique, extensively utilized by Abbott et al ,− , makes use of alkylthiol self-assembled monolayers (SAMs) either on thin gold films sputtered on glass or gold islands (i.e., nanoparticles) immobilized on surfaces via electron beam evaporation, which, depending on the chain length, combination of chain lengths, and functionalization, can induce multiple alignment scenarios in nematic LCs , . Another technique employs either glancing angle ion-beam deposition , , as well as ion beam ,− or plasma bombardment − of thin polymer, SiN x , diamond-like carbon, or other thin films deposited on substrates. Of these techniques, the glancing angle ion beam bombardment of diamond-like carbon is already used for the manufacturing of smaller LCD panels by IBM , .…”