本文關鍵詞： 濕法刻蝕 飛秒激光 微加工 微篩結(jié)構(gòu)　出處：《吉林大學》2015年碩士論文　論文類型：學位論文

【摘要】：微型全分析系統(tǒng)（Micro TotalAnalysis Systems, μTAS）又稱微全分析，是使化學分析設備微型化的一種系統(tǒng)，它將化學分析設備高度集成化，是近二十年來逐漸發(fā)展起來的一種新型的微型生化分析系統(tǒng)，又可以稱其為芯片實驗室（LabOn A Chip，LOC）或微流控芯片（Microfluidic Chips）。LOC目前已經(jīng)在多個領域應用，尤其是化學領域和生物領域，例如基因和蛋白分析、新藥開發(fā)、醫(yī)療檢查、環(huán)境監(jiān)測；以及微光學元件，例如微透鏡、微光柵、波導和微光學傳感器制作等；用于原位分析反應物，例如微流控芯片原位SERS檢測。微流控芯片成本低廉、樣品消耗量少、環(huán)境污染小、攜帶方便等諸多優(yōu)點，會使其在未來被越來越多人熟知，也將具有更廣泛的應用。 隨著微芯片系統(tǒng)尺寸不斷地縮小，有些甚至達到微米級別，傳統(tǒng)的制備微芯片的方法，如電子束刻蝕、濕法刻蝕等，不能滿足人們?nèi)找嬖鲩L的需求。從1960年第一臺紅寶石激光器的發(fā)明到如今已有五十多年過去，激光的應用已逐步滲透到科研領域、工業(yè)制造、醫(yī)學治療、國防等生產(chǎn)生活中。微加工技術是微電子行業(yè)的強力支撐，被廣泛應用在微機電系統(tǒng)、微光電系統(tǒng)、微芯片中，飛秒激光直寫空間分辨率為幾十納米，這么高的得分辨率超過了光學衍射極限，，因此飛秒激光微納加工技術更是這種強力支撐中的生力軍，隨著微全分析系統(tǒng)的不斷發(fā)展，微流控芯片中的飛秒激光加工更是吸引越來越多的關注。文章中解釋了飛秒激光雙光子吸收的原理，并且介紹了微加工系統(tǒng)的搭建方法以及搭建過程中光路需要滿足的某些條件。 本文內(nèi)容主要包括兩個方面。 1．傳統(tǒng)的濕法腐蝕制備玻璃通道芯片。利用氫氟酸與二氧化硅發(fā)生化學反應腐蝕玻璃基底，通過調(diào)整腐蝕液的配比來控制腐蝕速率，從而得到形貌良好的通道結(jié)構(gòu)。利用得到的微通道，以及聚苯乙烯和鈦酸丁酯的特性，可以獲得通道內(nèi)的微篩結(jié)構(gòu)，可以用于光催化反應中。 2.利用飛秒激光加工的方法制備微通道內(nèi)的微篩結(jié)構(gòu)。本文提出了雙次“曝光”一次顯影的實驗方法，來制備全SU-8通道內(nèi)微篩結(jié)構(gòu)。雙次“曝光”包括紫外光刻曝光以及飛秒激光直寫加工曝光；一次顯影是指在曝光后對未顯露的通道和加工結(jié)構(gòu)進行統(tǒng)一顯影。實驗想法來自于2010年在LOC雜志上的一篇文章。SU-8材料的通道能夠避免激光加工時，因通道壁與通道內(nèi)填充物折射率不同而對結(jié)構(gòu)造成影響。
[Abstract]:Micro TotalAnalysis Systems (渭 TAS), also known as micro total analysis, is a system for miniaturization of chemical analysis equipment. It highly integrates chemical analysis equipment and is a new type of micro biochemical analysis system developed gradually in the past twenty years. It can also be called LabOn A Chiploc or Microfluidic Chips).LOC, which has been applied in many fields, especially in chemical and biological fields, such as gene and protein analysis, new drug development, medical examination and environmental monitoring. And the fabrication of microoptical elements, such as microlenses, microgratings, waveguides and microoptical sensors, for in-situ analysis of reactants, such as in-situ SERS detection on microfluidic chips. Many advantages, such as easy to carry, will make it more and more familiar in the future, and will also have a wider application. As the size of the microchip system continues to shrink, some even reach the micron level. Traditional methods of fabricating microchips, such as electron beam etching, wet etching and so on, It has been more than 50 years since the invention of the first ruby laser in 1960, and the application of laser has gradually penetrated into the field of scientific research, industrial manufacture, medical treatment, Micromachining technology is a strong support in the microelectronics industry, and is widely used in micro electromechanical systems, micro optoelectronic systems, microchips, femtosecond laser direct writing spatial resolution of tens of nanometers, Such a high resolution exceeds the limit of optical diffraction, so femtosecond laser micro-nano processing technology is a new force in this kind of strong support, with the continuous development of micro-total analysis system. Femtosecond laser processing in microfluidic chips has attracted more and more attention. The principle of femtosecond laser two-photon absorption is explained in this paper. The construction method of micro-machining system and some conditions of optical path in the process of building are introduced. This paper mainly includes two aspects. 1. Glass channel chips were prepared by traditional wet etching. The glass substrate was corroded by chemical reaction between hydrofluoric acid and silica, and the corrosion rate was controlled by adjusting the proportion of corrosion solution. Using the obtained microchannels and the properties of polystyrene and butyl titanate, the microsieve structures in the channels can be obtained, which can be used in photocatalytic reactions. 2. The microscreen structure in the microchannel was fabricated by femtosecond laser processing. Double "exposures" include UV lithography and femtosecond laser direct writing. A development is a unified development of unexposed channels and processing structures after exposure. The experimental idea was derived from a 2010 article in LOC magazine in which the channels of the SU-8 material were able to avoid laser processing. The structure is affected by the different refractive index of the channel wall and the filling material in the channel.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN492

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