| 研究生: |
陳勇仁 Chen, Yung-jen |
|---|---|
| 論文名稱: |
白光LED陶瓷支架光學模擬優化及可靠度測試之研究 Ceramic Leadframe Optics Simulation Optimization and reliability verifying of White-Light LEDs |
| 指導教授: |
周榮華
Chou, Jung-Hua |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 工程科學系碩士在職專班 Department of Engineering Science (on the job class) |
| 論文出版年: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 74 |
| 中文關鍵詞: | 發光二極體 、陶瓷封裝 、LED可靠度 |
| 外文關鍵詞: | LED, Ceramic, PLCC, Reliability |
| 相關次數: | 點閱:88 下載:1 |
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白光發光二極體(White LED)將是未來綠色節能產業的主流。本文主要研究LED陶瓷封裝結構的可靠度試驗以及提升出光效率的光學模擬。目前LED 支架主要以PLCC塑膠材質的封裝型式較常見,但PLCC封裝,之缺點則是可靠性不佳,長時間點燈後會產生脆化及黃化現象,而影響到LED的光學特性。除了塑膠材質型式封裝外,另外一種材料的選擇就是陶瓷(Ceramic)封裝,其使用低溫燒結技術,材質特性不易改變,不黃化不脆化,其導熱率佳。
本論文研究使用陶瓷(Ceramic)材料做為LED 支架,透過光學模擬軟體TracePro分析,將支架碗杯角度及深度最佳化,實驗證明碗杯愈淺、角度愈大其發光愈佳,有最佳化的LED封裝效率比沒有最佳化的LED亮度提升約10%的提升,除了提昇LED發光效率外,其可靠度試驗也比塑膠穩定。
White light LED(White LED) will be the mainstream of the green energy-conserving Product in the future The main part of this thesis is the reliability test of ceramic packaging structure and the improvement of light emitting efficiency by optic simulations. Currently, the normal type of LED Package is Plastic Leaded Chip Carrier (PLCC) .However, for long time lighting, it will become unstable. Also, it may become yellowing and influence the optic characteristics of LEDs. Besides PLCC, the other LED package Uses ceramic of low temperature sintering technology and has stable characteristic and good heat conduction feature.
This thesis explores the reliability of ceramic LED packages and optimizes the angle and depth of the cup in lead frame by an optic simulation software, TracePro. This experiments prove that the cup of lead frame with a smaller depth and a larger angle will have better lighting efficiency. The optimized lead frame will be 10% better than that without optimization. The ceramic lead frame is also more stable than PLCC in long term applications.
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