| 摘要 |
<p>An aligning layer with a low angle (A) of inclination other than zero is produced for a visual indicator display cell contg. a nematic helical liq. crystal. Oblique evapn. is used to deposit a film forming a homogeneous parallel aligning layer with A above zero; and film is covered by material producing homogeneous alignment with A equal to zero. Film is pref. SiO. Material is a surfactant, which can be inclused in the liq. crystal filling, or deposited from a soln. temporarily placed in the cell and then drained out before filling the cell with liq. crystal. A surface coupling agent applied before assembling the cell, or as a vapour after assembly. Silica, obtd. by chemical vapour deposition, esp. using SiH4, O2, and heat at atmos. pressure, or a second layer of SiO, obtd. by oblique evapn. Surface alignment of liq. crystals is used to obtain a low angle (A) or to improve resistance to thermal decay.</p> |
