臺灣博碩士論文加值系統

3C產品為吸引消費者目光，皆朝向輕薄短小的方向設計，電子散熱裝置也在此趨勢下受到嚴峻的挑戰，均熱板為一種以熱管為理論基礎的兩相變化熱傳冷卻系統，二相熱傳元件為一真空腔體內襯微結構於內壁上，利用腔體內部流體的蒸發凝結進行快速熱傳遞。本研究擬利用此熱傳原理製備一薄型均熱板，藉由不同蒸氣流道寬度之均熱板效能檢測，與腔體內部蒸發區不同形狀之燒結銅粉結構的導入應用，探討對性能之影響。
本研究將氣室高度固定於0.6 mm，製備蒸氣流道寬度2、4、6 mm之均熱板，並在蒸發區使用不同的微結構形狀，藉由與相同厚度銅塊和一般均熱板進行效能檢測。結果顯示不同流道寬度中以w6 VC在100 W時有最低熱阻0.194 ΔT/W，複合微結構中以十字溝槽均熱板在100 W時有0.186 ΔT/W熱阻值，成功改善一般薄型均熱板熱阻過高的問題。

3C products have been designed toward thinner and tiny scale as a result of attracting more attention of consumers. Thus, the improved efficiency of heat dissipation for electronic devices a difficult challenge. Vapor chamber is one kind of cooling system using theory of changed thermal conductivity from two-phase, which is based on heat pipe. This two-phase component consists of a wick structure which is inside the vacuum chamber wall; using the working fluid evaporation and condensation characteristic to speed up the thermal transmission. In this study, we fabricate the thin vapor chamber with using different vapor flow channel width, and different shapes of sintered copper powder inside the cavity of the evaporation area, to investigate the impact on performance of the vapor chamber.
For this research, we use 0.6 mm thickness as the vapor space height. Preparation of 2, 4, 6 mm vapor flow channel width and different wick shape in evaporation area of the vapor chamber. Compare with normal vapor chamber and copper to detection performance. The result in different flow channel width test shows that w6 VC has a minimum resistance 0.194 ΔT/W at 100 W. In hybrids wick test, The cross groove VC has 0.186 ΔT/W resistance at 100 W. This study successfully improved the thin vapor chamber’s high heat resistance problem.

摘要 i
ABSTRACT ii
誌謝 iv
目錄 v
表目錄 vii
圖目錄 viii
第一章 緒論 1
1.1前言 1
1.2研究動機與目的 1
第二章 文獻回顧 5
2.1均熱板工作原理 5
2.1.1 密閉容器 7
2.1.2 工作流體 8
2.1.3 毛細結構 11
2.1.4 均熱板之操作極限 13
2.2 小結 20
第三章 研究方法 21
3.1 實驗流程 21
3.2 銅網規格選擇 22
3.2.1 銅網對均熱板影響 22
3.2.2 收縮率 23
3.2.3 孔隙率 24
3.2.4 滲透率 24
3.3 薄型均熱板製作 26
3.3.1 均熱板殼體製備 26
3.3.2 放射狀微結構製備 27
3.3.3 複合微結構製備 28
3.3.4 試片表面處理 30
3.3.5 上、下蓋接合與注水 30
3.4 性質量測 34
3.4.1 測試設備 34
3.4.2 測試步驟 36
第四章 結果與討論 38
4.1 微結構分析 38
4.2 可靠度分析 40
4.3 薄型均熱板性能 42
4.3.1 均熱板熱響應分析 42
4.3.2 均熱板熱顯像分析 46
4.3.3 不同流道寬度之均熱板測試數據 50
4.3.4 蒸發區微結構改變之均熱板測試數據 53
第五章 結論 57
參考文獻 58
符號彙編 62

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