CNT-BLU/CNT-FED玻璃面板封裝之應力分析與設計

Abstract

奈米碳管場發射顯示器因其簡單的構造，與能夠大尺寸生產，使其具有相當的效益優勢，有機會成為平板顯示器未來市場主要產品。因此，掌握此大尺寸平面電視的先進技術，為研究之重要課題。在奈米碳管場發射顯示器封裝製程中，玻璃基板會隨溫度變化而產生熱應力，且常因應力過大而造成破裂，本研究即針對此問題進行研究。 本研究首先對影響裂片的原因進行了探討，並針對有限元素模擬時所需的材料性質進行了文獻、廠商資料搜尋以及真實材料試驗。接著以彈性的玻璃材料模型進行了初步的有限元素應力分析，針對熱膨脹係數、玻璃粉、抽氣管與真空對殘留應力的影響進行了討論。最後針對Spacer的部份進行最佳化設計的討論。

There exist opportunities for carbon nano-tube field emission display (CNT-FED) to be major product on the large size flat panel TV market, because the structure of CNT-FED is simple and large size manufacturing is practicable. Therefore, it’s important to obtain the advanced technique of CNT-FED. As the temperature changes, the thermal stresses appear on the glass plates during the packaging process of CNT-FED. The glass plate might be subjected to brittle fracture if the stress is too large. This research is thus aimed to overcome this problem occurred in the process. First, the possible reasons of the fracture of plate were discussed, and the material properties that will be used in numerical analysis were collected by either surveying literatures or conducting material tests. Second, an elastic finite element analysis was performed to calculate the residual stress distribution for glass plate corresponding to the real packaging process. The effects of thermal expansion coefficients and the influence of the exhaust tube on the residual stress in the vacuum condition were examined and discussed. Finally, the optimum design of spacer was discussed.