场发射显示器中消气剂使用的若干问题

Usage of Getter in Field Emission Display

在场发射显示器 (FED)中使用消气剂 ,是维持FED内部真空度的最主要的手段 ,对延长FED的工作寿命起着重要作用。本文首先从抽气平衡方程推导得到了检验FED漏率是否合格的判别公式 ,并从此判别公式出发 ,对真空环境和FED工作寿命之间的关系进行了计算。文中提出了一种新型的器件封装结构的方案 ,实现了蒸散型和非蒸散型消气剂 (NEG)的同时使用 ,对延长FED ,特别是大屏幕FED的工作寿命 。

Getters play an important role in vacuum maintenance and in lengthening the life time of a field emission display (FED) device.A discriminating equation,derived from the pumping balance equation can be used not only to check the leak rate,but also to evaluate the dependence of the working life time of the FED on vacuum environment.The calculation leads to a new device structure design,in which both evaporable and non evaporable getters(NEG) can be adopted simultaneously.Moreover,the new structured FED with large screen enjoys higher stability and longer life time than the old ones.