러빙강도에 따른 배항막과 액정 분자의 극각 분석 = Analysis of pretilt angle of polyimide layer and liquid crystal molecule monolayer by rubbing strength

다국어 초록 (Multilingual Abstract)

In this thesis, the pretilt angle which is an important parameter to determime the electro-optical characteristics in LCDs (Liquid Crystal Displays) is measured by the SHG(Second Harmonic Generation) and LB(Langmuirr Blogett) techniques. By the SHG technique the distribution characteristics of surface molecules can be found using the nonlinear characteristics obtained by the broken inversion symmetry on the material surface. It is necessary to deposit a monolayer on the substrate to find the distribution characteristics of LC molecules. It is possible by the aid of LB technique. As the rubbing strength goes up, the SH signals and pretilt angles are increased, but when rubbing strength is over certain value they are decreased.

목차 (Table of Contents)

• 목차
• Ⅰ. 서론 = 1
• Ⅱ. LB의 이해 = 4
• 2.1 LB의 원리 = 4
• 2.2 Langmuirr 순서 = 6
• 2.3 Π-A도의 이해 = 8
• Ⅲ. 표면 SHG의 이론적 배경 = 10
• 3.1 액정분자의 비선형 감수율 = 10
• 3.2 액정분자의 평균 극각 = 18
• Ⅳ. 실험 및 검토 = 21
• 4.1 러빙 조건 = 21
• 4.2 LB 실험구성 = 23
• 4.3 SHG 실험구성 = 26
• 4.4 SH 신호 측정 = 29
• 4.5 실험결과를 통한 비선형 감수율 추출과 프리틸트 각 = 36
• 4.6 검토 = 55
• Ⅴ. 결론 = 57
• 참고문헌 = 58
• Abstract = 60