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研究生: 吳俊穎
Wu, Chun-Ying
論文名稱: 任意曲面3D微結構之準分子雷射加工及光學應用
Excimer Laser Microfabrication of 3D Microstructures and their Optical Applications
指導教授: 李永春
Lee, Yung-Chun
學位類別: 碩士
Master
系所名稱: 工學院 - 微機電系統工程研究所
Institute of Micro-Electro-Mechancial-System Engineering
論文出版年: 2005
畢業學年度: 93
語文別: 中文
論文頁數: 117
中文關鍵詞: 非球面微透鏡孔洞面積法微光學元件折射式微透鏡準分子雷射加工
外文關鍵詞: Hole Area Modulation Method, Refractive Microlens, Micro-Optic Device, Aspheric Microlens, Excimer Laser Micromachining
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  •   本論文利用準分子雷射微細加工技術製作任意曲面形貌之三維微結構,主要研究重點是利用「準分子雷射行星式加工法」與「改良式孔洞面積法」製作軸對稱以及非軸對稱之三維微結構,並將其應用於折射式光學微透鏡,證明此二種準分子雷射加工法應用於製作折射式光學微透鏡之可行性與精確度。
      
      在「準分子雷射行星式加工法」方面,利用特殊的光罩設計及工件的自轉與公轉,使雷射投射在工件上的呈現三維的連續分布,快速且精確地製作軸對稱非球面微透鏡與微型光纖耦合透鏡,實驗結果顯示此加工法所製作之微透鏡具有表面形貌控制性佳、表面粗糙度僅約10nm、光學特性良好等優點,證明此準分子雷射行星式加工法應用於製作折射式微光學元件之發展潛力。
      
      於「改良式孔洞面積法」方面,藉由改變雷射加工時的雷射加工路徑參數,證明採用高斯分佈格點之改良式孔洞面積法可有效改善一般採整齊格點法之孔洞面積法表面粗糙度較大的缺點,但此一改良式孔洞面積法仍具有表面形貌加工精度較差的缺點,若能改善此一問題,本加工法將可成功應用於製作雷射二極體準直透鏡等非軸對稱微光學元件。

      This study applies excimer laser micro-machining technology for manufacturing 3D arbitrary microstructures. Two kinds of excimer laser machining technology are presented to fabricating microlenses in order to verify the feasibility and accuracy of these excimer laser micromachining processes.

      First, “Excimer Laser Planetary Contour Scanning Method” is applied to manufacturing axially symmetrical aspheric microlenses. The basic idea is based on a specific mask design method and a sample rotation method which includes both self-spinning and circular revolving to provide a probability function of laser machining. The probability function created by the planetary scanning assures a continuous, smooth, and precise surface profile to the machined microstructures. The surface profiles are measured and compared with their theoretical counterparts. Excellent agreements both in profile shapes and dimensions are achieved. The machining profile accuracy and surface smoothness of this proposed micromachining method show great potentials in fabricating micro-optic components such as aspheric microlenses or microlens arrays.

      In order to fabricate non-axially symmetrical microstructures, the excimer laser machining method known as “Hole Area Modulation Method” is presented and modified to realize this purpose. This thesis modifies parameters of machining contour paths and mask design process to minimize the roughness of machined microstructures. The experimental results show that this “Modified Hole Area Modulation Method” could improve the roughness of machined microstructures successfully but still has some problem on machining accuracy. By overcoming these drawbacks, this machining method must have great potentials in manufacturing non-axially symmetrical micro-optical devices such as laser diode collimator in the future.

    摘要.................................................I Abstract...........................................III 誌謝.................................................V 目錄................................................VI 圖目錄..............................................IX 表目錄..............................................XV 符號說明...........................................XVI 第一章 緒論.........................................1  1-1 研究背景與目的................................1  1-2 文獻回顧......................................4  1-3 本文架構......................................9 第二章 準分子雷射加工法............................11  2-1 準分子雷射原理...............................11  2-2 KrF準分子雷射加工系統........................15  2-3 行星式加工法.................................18   2-3-1行星式加工法原理...........................18   2-3-2 光罩設計理論..............................21   2-3-3 加工路徑規畫..............................22  2-4 改良式孔洞面積法.............................24   2-4-1 孔洞面積法加工原理.......................24   2-4-2 光罩設計理論.............................25   2-4-3 加工路徑規畫與模擬加工結果...............29 第三章 軸對稱非球面微透鏡設計、製作與檢測..........37  3-1 折射式微透鏡設計.............................37  3-2 光罩設計與結果...............................45  3-3 準分子雷射加工...............................49  3-4 微透鏡製作結果檢測...........................51   3-4-1 表面形貌檢測..............................51   3-4-2 掃描式電子顯微鏡(SEM)量測..............58   3-4-3 表面粗糙度檢測...........................61   3-4-4 微透鏡之光學特性檢測.....................63 第四章 微型光纖耦合透鏡設計、製作與檢測............69  4-1 非球面微透鏡設計.............................69  4-2 光罩設計結果.................................74  4-3 準分子雷射加工...............................75  4-4 微透鏡製作結果檢測...........................76   4-4-1 微透鏡三維表面形貌量測...................76   4-4-2 掃描式電子顯微鏡(SEM)量測..............78   4-4-3 表面粗糙度檢測...........................79   4-4-4 光纖耦合效率檢測.........................80 第五章 改良式孔洞面積法製作非軸對稱微結構..........84  5-1 改良式孔洞面積法之加工路徑參數探討...........84   5-1-1 光罩設計與路徑規畫.......................84   5-1-2 掃描式電子顯微鏡(SEM)量測..............87   5-1-3 三維表面形貌檢測.........................89   5-1-4 表面粗糙度分析...........................91  5-2 改良式孔洞面積法光罩設計參數探討.............94   5-2-1 光罩設計.................................94   5-2-2 掃描式電子顯微鏡(SEM)量測..............95   5-2-3 三維表面形貌檢測.........................97   5-2-4 表面粗糙度分析..........................100  5-3 結果與討論..................................103 第六章 結論.......................................105 參考文獻...........................................110 附錄一 表面粗糙度分析之參數定義....................114

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