Polyimide alignment layer is a very important liquid crystal alignment. The most well-known Liquid crystal display (LCD) alignment methods are homogeneous alignment and homeotropic alignment. This paper research uses different fluff depth and number of rubbing into polyimide,and changes the level of rubbing strength, to observe how electro-optical properties of vertical liquid crystal alignment changes with rubbing strength. By rubbing polyimide with different rubbing strength, this research uses two kind of negative liquid crystal (¡µ£`<0) as samples. This research finds that when rubbing strength increases, the contrast ratio tends to drop.However, the contrast ratio rises after certain level of rubbing strength is applied. Regarding the response time, this research finds that when rubbing strength increases, the response time tends to drop as well. However, the response time rises and falls irregularly after certain level of rubbing strength is applied.

In this study, we want to realize the influence of temperature on the ferroelectric liquid crystal flow and rubbing strength on the surface free energy of the polyimide thin film. The rubbing strength is determined by pile impress and the number of rubbing. The surface energy of the samples is measured. On the other hand the ferroelectric liquid crystal flow on the polyimide thin film was observed using a polarizing microscope. We found that the polyimide film treated by rubbing the surface properties will become non-uniformity. When the number of rubbing increased to a certain extent, polar energy is not changed, white disperse energy is continued to show fluctuations. In liquid crystal flow observation, we found that when the polyimide thin film temperature is low, the flow of ferroelectric liquid crystal is relatively slow, and its flow direction is in rubbing direction. When the polyimide thin film temperature is high, ferroelectric liquid crystal has two-dimensional flow. In addition to the direction of the original rubbing direction, but also increased the flow in the direction of the vertical rubbing.

In the present studies we investigated the effects of mechanical rubbing on the surface characteristics of polymer liquid crystal alignment layers. Contact angles of water droplets in contacted with the rubbed polyimide were measured using a surface tension meter, and the surface free energy of the polymer thin films were evaluated. We found that the contact angle of water and surface free energy on rubbed polyimide is anisotropic, and rubbing caused decrease in surface free energy and wettability of the polyimide surface. It was also seen that the contact angle hysteresis and the surface free energy measured in the direction parallel to the rubbing direction is smaller than that in the direction anti-parallel to the rubbing direction. We found that when the pile impression of the velvet fibers is 0.3 mm and the cumulative number of rub is 3 times, the contact angle hysteresis in direction parallel or anti-parallel to the rubbing direction will to be close. Be suitable choosing rubbing conditions, the SSFLCs without zigzag defects was produced. The pretilt angle and the response time of liquid crystal increased with the cumulative number.

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TFT-LCD（薄膜電晶體液晶顯示器）是台灣全力發展的重點產業。TFT-LCD 產業特徵是專業分工產業，LCD產業價值鏈可分成上游材料廠商、中游面板廠商、下游應用廠商。主要的上游零件及材料包括玻璃基板(glass substrate)、彩色濾光片(color filter)、偏光板/膜(polarizer)、背光模組(backlight module)、驅動IC(Driver IC)、配向膜(alignment layer)。 LCD面板生產所需要的這些原材料占面板生產總成本的70％以上。對面板製造商來說，透過整合減少成本成為一個重要的議題。許多面板的關鍵零組件是設計導入(design in)的產品，對於面板設計，需要配合製造商的要求和規格。所以面板廠商和關鍵零組件廠商之間的快速溝通和反應是非常重要。 目前部分材料是從國外進口的，其中配向膜是日商擁有90%的市佔率。雖然LCD面板成本結構中的比重不高，但是液晶配向膜是決定液晶顯示器面板品質的關鍵材料。主要的配向膜廠商分別是日產化學和JSR。雙方都是日商的化學公司。JSR是2005年投入台灣市場，設立JSRmicro(台灣捷時雅邁科股份有限公司)，日產化學則是2010年才進入台灣市場。而且日產化學是液晶配向膜的先鋒者，10年前的市占率大約80%，但是今年降低到50%。日產化學進來台灣時，透過日系綜合商社來交易。而JSR在台灣則是透過台灣的中間商(華立通路商)來交易。 本研究以日系液晶顯示器關鍵材料配向膜廠商「台灣日產化學」為實例，進行專業訪談。探討台灣日產化學之中游面板廠商的產業鏈，並希望運用邱志聖(2010)之策略行銷4C架構分析，進行深入探討日產化學在台灣市場中，如何降低台灣LCD面板廠商的交易成本包含外顯單位效益成本、資訊搜尋成本、道德危機成本、專屬陷入成本，進而了解此公司的競爭優勢，繼而進行跟競爭對手的4C成本比較分析，提供個案公司建議。 本研究目的為了解： 1.日產化學跟客戶之間的4C關係 2.日產化學與通路商之間的關係 3.日產化學跟競爭對手(JSR)的作法比較 研究結果發現： 1.中間商的選擇、數量、提供的產品種類多寡，以及中間商提供的服務都會影響到日產化學對面板廠商的交易成本。 2.相同產業內供應商提供的產品種類多寡會影響到對面板廠商以及中間商的交易成本。 3.製造商之知名度的高低會影響到中間商的選擇權力。 / TFT-LCD (thin film transistor liquid crystal display) is one of the key industries in Taiwan. TFT-LCD industry is characterized as a specialization industry. The LCD industry value chain can be divided into upstream materials manufacturers, the midstream panel manufacturers, and downstream application vendors. Upstream material parts include glass substrate, color filter, polarizer film, backlight module, the driver IC, and alignment layer. These essential components needed in LCD panel production account for more than 70% of the total cost in panel production. Therefore an important issue for panel makers is to reduce costs through integration. As many of the key components of the panel is the “design in product”, which need to be designed according to manufacturer's requirements and specifications, rapid communication and response between panel manufacturers and key components manufacturers is very important. Some materials are imported from abroad; Japanese companies have 90% market share in the alignment film market. Although the proportion of the cost structure of the LCD panel is not high, but the alignment layer is the key material to determine the quality of liquid crystal display panel. Two main alignment film makers are Nissan Chemical and JSR. They both are Japanese chemical companies. JSR devotes into Taiwanese market in 2005, and established JSRmicro. Nissan Chemical started its business in Taiwan at 2010, by establishing Taiwan Nissan Chemical. Nissan Chemical is the pioneer in liquid crystal alignment film and once had approximately 80 percent of market share 10 years ago, but it has declined to 50% as of now. Nissan Chemical transact through Japanese Sogo Shosha in Taiwai. JSR transact through Taiwanese intermediaries (Wahlee distributor) in Taiwan. In this study, Japanese liquid crystal alignment layer manufacturer Taiwan Nissan Chemical were professionally interviewed, then explored between Taiwan Nissan Chemical and the panel manufacturers’ industry chain. This study will also apply strategic marketing 4C framework for analysis, then conduct an in-depth investigation on how Taiwan Nissan Chemical reduces transaction costs for Taiwan LCD panel manufacturers, illustrate the company's competitive advantage through the transaction costs analysis, including buyer utility cost, information searching cost, moral hazard cost, and asset specificity cost, and lastly compare with the competitor’s transaction cost. The purposes of this research are: 1. The 4C relationship between Nissan Chemical and the client 2. The relationship between Nissan chemical and the distributors 3. The 4C comparison between Nissan Chemical and the competitor (JSR) The results of study show that: 1. A choice of intermediaries, the number of intermediaries, the number of product that intermediaries offer, and the services intermediaries provide will affect the transaction costs of Nissan Chemical for panel makers. 2. The product range provided by the suppliers within the same industry would affect the transaction costs of panel makers and intermediaries, 3. The well-known level of the manufacturer will affect the power of choice for intermediaries.