Journal of the Korean Institute of Telematics and Electronics D (전자공학회논문지D)
- Volume 34D Issue 4
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- Pages.113-120
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- 1997
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- 1226-5845(pISSN)
Analysis of alignment characterization of backward rubbed polyimide by second-harmonic generation technique
SHG 기법에 의한 역 러빙 처리된 배향막의 배향 특성 해석
Abstract
In this paper, we have obtained information about the orientational distribution (polar and azimuthal) of the surface molecules on backward rubbed polyimide. Using the second-harmonic genration tecnique, the nonlinear susceptibility tensor components were induced. And, the orientational distribution function was estimated without a prior assumptions, using the maximum entropy method. The polar angle of surface molecules befor rubbing is isotropic. The polar angle of surface molecules after rubbing is anisotropic along the rubbing direction. The polar angle of surface molecules after several rubbing is determined by the last rubbing direction.
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