Microrubbing technique to produce high pretilt multidomain liquid crystal alignment

Varghese, Soney; Crawford, Gregory P.; Bastiaansen, Cees W. M.; de Boer, Dick K. G.; Broer, Dirk J.
July 2004
Applied Physics Letters;7/12/2004, Vol. 85 Issue 2, p230
Academic Journal
We disclose a microrubbing (μ-rubbing) technique to create multidomain alignment in liquid crystal displays. A small metallic sphere under sufficient load is used to directly rub a polyimide alignment layer that is known to enforce homeotropic boundary conditions of the liquid crystal. We demonstrate a 47 μm linewidth and a 10° pretilt with respect to the substrate plane. We report on the electro-optic performance properties and viewing angle characteristics of four domain samples, where the midplane angle of the director is oriented in four different directions.


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