近年来,随着液晶显示器件(LCD)在信息处理机、办公自动化仪和电视等领域的开拓应用,对真正具有与CRT相匹敌的高显示品质、高性能的大型LCD的呼声日益高涨,期望尽早实用化和商品化.有源矩阵LCD虽在技术上可满足要求,但由于工艺复杂、成品率低,其大型化和低成本化目前仍然相当困难. In recent years, with the development and application of liquid crystal display devices (LCDs) in fields such as information processors, office automation devices and televisions, there is a growing demand for large LCDs with high display quality and high performance comparable to CRTs. As early as practical and commercialization.Although the active matrix LCD technology to meet the requirements, but due to complex processes, low yield, the size and cost is still quite difficult.