液晶在五公分陽極處理氧化鋁薄膜上之配向研究

Abstract

本工作建立製作五公分直徑之陽極氧化鋁薄膜(Anodic Aluminum Oxide；AAO)設備，並研究其製作之薄膜作為液晶樣品配向膜之性質。利用控制不同的蝕刻時間，製作無電極硬式基板(玻璃)的液晶樣品，能使得液晶分子產生垂直配向、高預傾角配向。此外，以AAO薄膜作為液晶樣品的配向膜，分別以銦錫氧化物薄膜(Indium Tin Oxide；ITO)、鈦膜作為導電層，製作兩種具有電極硬式基板的液晶樣品，皆能使得液晶分子產生高預傾角配向。具有電極硬式基板的液晶樣品可利用電場控制液晶分子的液晶預傾角，使穿透率產生明暗變化。最後，以聚對苯二甲酸乙二酯(Polyethylene Terephthalate；PET)作為軟式基板，嘗試製作AAO薄膜，會有剝落的現象。

In this work, we build up the system to manufacture the anodic aluminum oxide (AAO) films with dimension of 5 cm. We also study on the properties of the AAO films as the alignment layer of the liquid crystal (LC) samples. The LC cell using the glass substrate without the conductive film has been demonstrated. Nematic LC molecules can be vertical or high pertilt aligned by controlling the etching time. In addition, we have also used the AAO film with the indium tin oxide (ITO) film or the titanium film underneath as the conductive film. Nematic LC molecules can also be aligned with high pretilt angle. The transmittance of a LC cell can be controlled by applying electric field to it. Finally, we use the polyethylene terephthalate (PET) as the flexible substrate. But the AAO film is too easy to be peeled.