發(fā)布時(shí)間：2018-11-08 16:54

【摘要】：隨著現(xiàn)代高科技的發(fā)展,柔性電路板(Flexible Printed Circuit Board,簡(jiǎn)稱FPC)對(duì)高密度、微孔徑提出越來越高的要求,傳統(tǒng)的機(jī)械加工方法已不能滿足此需求。飛秒激光微加工具有加工精度高、熱效應(yīng)小、損傷閾值低等優(yōu)點(diǎn),在打孔中廣泛應(yīng)用。偏振態(tài)是激光的基本參數(shù)之一,對(duì)微孔加工的特性有重要影響。本論文研究不同偏振態(tài)飛秒光束對(duì)FPC微孔加工特性,主要研究?jī)?nèi)容如下:首先,介紹了激光與材料的作用機(jī)理,以及激光作用金屬材料加工孔四個(gè)階段的作用過程。討論了現(xiàn)階段激光沖擊打孔法和輪廓迂回法的兩種打孔方式,并分析特點(diǎn)以及適用范圍。另外用公式推導(dǎo)了選用面積法測(cè)量損傷閾值的理論和可行性,設(shè)計(jì)光路和搭建實(shí)驗(yàn)系統(tǒng)測(cè)出了FPC在飛秒激光器單脈沖下的損傷閾值為25.44J/cm~2。其次,介紹了幾種常見偏振光束的物理幾何描述和四種偏振態(tài)的矢量光場(chǎng)。描述了空間光調(diào)制器的相位調(diào)制原理與4f光學(xué)系統(tǒng)原理。并設(shè)計(jì)了光路原理圖,利用通過空間光調(diào)制器計(jì)算得到計(jì)算機(jī)全息圖,結(jié)合1/2波片和1/4波片的快軸與水平方向的角度控制出線偏振光、圓偏振光、徑向偏振光和角向偏振光。最后,設(shè)計(jì)并搭建了加工實(shí)驗(yàn)系統(tǒng),其主要由飛秒激光器、空間光調(diào)制器、CCD相機(jī)和三維移動(dòng)平臺(tái)等組成。利用控制出的4種偏振態(tài)光束對(duì)FPC微孔加工特性分析,分析了脈沖能量對(duì)孔徑影響,不同偏振態(tài)光束對(duì)微孔圓度及燒蝕程度等影響。從實(shí)驗(yàn)結(jié)果看出軸對(duì)稱矢量的徑向偏振光和角向偏振光加工后的孔徑稍大于線偏振和圓偏振。并得出線偏振光燒蝕最為嚴(yán)重,圓度最差;圓偏振光燒蝕情況較好,圓度比線偏光好;徑向偏振光和角向偏振光綜合上燒蝕情況和圓度比前兩種好,而且徑向偏振光加工微孔質(zhì)量更好。之后針對(duì)項(xiàng)目課題部分指標(biāo)進(jìn)行加工實(shí)驗(yàn)。
[Abstract]:With the development of modern high technology, flexible circuit board (Flexible Printed Circuit Board,) has put forward higher and higher requirements for high density and microaperture. The traditional machining method can not meet this demand. Femtosecond laser micromachining has many advantages such as high machining precision, low thermal effect and low damage threshold, so it is widely used in drilling. Polarization state is one of the basic parameters of laser, which has an important effect on the characteristics of micropore machining. The main contents of this thesis are as follows: firstly, the mechanism of laser interaction with materials and the four stages of laser processing of metal materials are introduced. In this paper, two kinds of drilling methods of laser impact drilling and contour roundabout are discussed, and their characteristics and application range are analyzed. In addition, the theory and feasibility of using the area method to measure the damage threshold are deduced. The damage threshold of FPC under the femtosecond laser pulse is 25.44 J / cm ~ (2) by designing an optical path and setting up an experimental system. Secondly, the physical geometry description of several common polarized light beams and the vector light fields of four kinds of polarization states are introduced. The principle of phase modulation and 4 f optical system of spatial light modulator are described. The principle diagram of optical path is designed, and the computer hologram is obtained by using spatial light modulator. Combined with the angle of fast axis and horizontal direction of 1 / 2 wave plate and 1 / 4 wave plate, the line polarized light and circularly polarized light are controlled. Radial polarized light and angular polarized light. Finally, a machining experiment system is designed and built, which consists of femtosecond laser, spatial light modulator, CCD camera and 3D mobile platform. The effects of pulse energy on pore diameter and the circularity and ablation degree of micropore in different polarization state beams were analyzed by analyzing the processing characteristics of FPC micropores by four kinds of controlled polarized beams. The experimental results show that the radial polarization and angular polarization of axisymmetric vector are slightly larger than that of linear and circular polarization. The results show that the ablation of linear polarized light is the most serious and the roundness is the worst, and the circular polarization is better than the linear polarization. The radial polarized light and the angular polarized light are better than the former two in the condition of ablation and roundness, and the quality of the micro-hole is better by the radial polarized light. After that, processing experiments are carried out for some indexes of the project.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN249;TN405

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 翟中生;胡勇濤;呂清花;陳列;婁德元;楊奇彪;Peter Bennett;劉頓;;基于空間光調(diào)制器的光束偏振態(tài)控制方法研究[J];激光與光電子學(xué)進(jìn)展;2016年03期

2 侯文峰;曾東穎;敖以全;;基于柔性電路板材的PCB微鉆優(yōu)化[J];工具技術(shù);2015年03期

3 王成勇;鄭李娟;黃欣;李珊;廖冰淼;湯宏群;王冰;楊禮鵬;;印制電路板微孔機(jī)械鉆削研究[J];印制電路信息;2015年03期

4 朱竹青;李楊;馮少彤;王曉雷;貢麗萍;聶守平;;基于圓偏振光干涉的相移數(shù)字全息術(shù)理論與實(shí)驗(yàn)研究[J];中國(guó)激光;2014年04期

5 常強(qiáng);楊艷芳;何英;劉海港;劉鍵;;4pi聚焦系統(tǒng)中振幅和相位調(diào)制的徑向偏振渦旋光束聚焦特性的研究[J];物理學(xué)報(bào);2013年10期

6 唐新春;高健存;王坤;方茗;;徑向偏振光的產(chǎn)生方法及應(yīng)用[J];激光與光電子學(xué)進(jìn)展;2013年03期

7 夏博;姜瀾;王素梅;閆雪亮;劉鵬軍;;飛秒激光微孔加工[J];中國(guó)激光;2013年02期

8 顧理;孫會(huì)來;于楷;趙方方;;飛秒激光微加工的研究進(jìn)展[J];激光與紅外;2013年01期

9 張菲;段軍;曾曉雁;李祥友;;355nm紫外激光加工柔性線路板盲孔的研究[J];中國(guó)激光;2009年12期

10 劉堯葵;徐勛;唐幸兒;;撓性電路板技術(shù)的現(xiàn)狀和發(fā)展趨勢(shì)[J];印制電路信息;2009年10期

相關(guān)博士學(xué)位論文 前1條

1 榮振宇;基于液晶空間光調(diào)制器的矢量光場(chǎng)調(diào)控研究[D];山東師范大學(xué);2014年

相關(guān)碩士學(xué)位論文 前7條

1 熊厚;納秒激光薄鋁板精密打孔研究[D];湖北工業(yè)大學(xué);2016年

2 姚龍?jiān)?飛秒激光燒蝕石英玻璃機(jī)理與形貌特征研究[D];大連理工大學(xué);2014年

3 李立;光學(xué)小波變換的4f系統(tǒng)研究[D];重慶大學(xué);2009年

4 宮磊;Nd：YAG激光器激光打孔實(shí)驗(yàn)研究[D];長(zhǎng)春理工大學(xué);2008年

5 辛鳳蘭;高質(zhì)量激光打孔技術(shù)的研究[D];北京工業(yè)大學(xué);2006年

6 游牧;超短激光脈沖與透明介質(zhì)相互作用[D];中國(guó)科學(xué)院研究生院（西安光學(xué)精密機(jī)械研究所）;2005年

7 董海云;小錐度激光打孔技術(shù)及工藝研究[D];長(zhǎng)春理工大學(xué);2004年

，

本文編號(hào)：2319111