摘要(英) |
With the continuous advancement of semiconductor technology, Silicon Carbide (SiC) has become a key material for high-performance electronic components due to its excellent physical properties. Against this background, this research aims to explore SiC materials. Laser modification technology is applied to SiC slicing, altering the internal structure of SiC through laser energy to form a modified layer. The thickness of the modified layer reflects the power and depth of laser action during laser slicing, thereby affecting wafer quality. Therefore, we employ Shape From Focus (SFF) technology to measure the thickness of the modified layer inside SiC, improving wafer quality and the stability of the modification process. Through systematic investigation and experimentation, we innovatively attempted and optimized the application of SFF technology on SiC materials, achieving significant progress, especially in measuring the thickness of the modified layer.
The research first summarizes the basic properties of SiC materials, their current applications in high-tech fields, and the importance of modified layer thickness. Next, we analyze the principles and application prospects of SFF technology. Through experimental exploration, this study successfully developed a SFF system for measuring the internal modified structure of SiC and compared and evaluated the effectiveness of different focus value algorithms in measuring the thickness of the SiC modified layer. The results show that in longitudinal measurements, the system′s longitudinal resolution is 0.8 µm. Using the Scharr algorithm combined with a normal distribution filter threshold, the measured thickness of the modified layer has an error of only 5 % compared to the results measured by a white light interferometer microscope. Furthermore, this study further verified the performance of the SFF system using a THORLABS optical resolution test target as a standard. In lateral measurements, we compared its standard length with the length calculated from images captured by the SFF system, showing an error of less than 1 % between the two. The lateral resolution of this system is 3.45 µm, with a diffraction limit of 1.8 µm, conforming to the theoretical diffraction limit. This result demonstrates the accuracy of the SFF system in both longitudinal and lateral measurements. Finally, this research also analyzes potential sources of error in the measurement process using the SFF system, explores various potential influencing factors, and proposes corresponding optimizations to enhance system performance. |
參考文獻 |
參考文獻
[1] 丁嘉仁,翁志強,劉俊葳,「碳化矽晶圓複合加工技術」,機械工業雜誌,民國106年。
[2] 宋燕國,郭旭,王嫣鸞,郝強,「皮秒脈衝隱形切割碳化矽晶圓實驗研究」,光學儀器,民國111年。
[3] 隱形切割加工。取自DISCO公司網站
https://www.disco.co.jp/cn_t/solution/library/laser/stealth.html
[4] S. K. Nayar, and Y. Nakagawa, “Shape from focus,” Pattern Analysis and Machine Intelligence, Vol. 16, no. 8, pp. 824-831 (1990).
[5] W. J. Choyke, “Silicon Carbide: Presolar SiC Stardust Grains and the Human History of SiC from 1824 to 1974,” Handbook of Silicon Carbide Materials and Devices, pp. 3-28 (2023).
[6] H. Abderrazak, and E. S. B. H. Hmida, “Silicon carbide: synthesis and properties,” Properties and applications of Silicon Carbide, pp. 361-388 (2011).
[7] H. Moissan, “Étude du Siliciure de carbone de la météorite de cañon Diablo,” Comptes rendus Acad. sci, Vol. 140, pp. 405-506 (1905).
[8] H. J. Round, “Light-emitting diodes hit the centenary milestone,” Electr. World, Vol. 19, pp. 309-310 (1907).
[9] J. A. Lely, “Berichte der Deutschen Keramischen Gesellschaft,” Vol. 32, pp. 229 (1955).
[10] M. Y. Tairov, and V. F. Tsvetkov, “General principles of growing large-size single crystals of various silicon carbide polytypes,” Journal of Crystal Growth, Vol. 52, pp. 146-150 (1981).
[11] H. J. Rost, D. Schulz, and D. Siche, “High nitrogen doping during bulk growth of SiC,” in Silicon Carbide: Recent Major Advances, pp. 163-178 (2004).
[12] W. H. Chang, Y. C. Huang, and R. J. Lin, “Applications of Single Crystal SiC in Microelectronic Devices and Microsensors,” Instruments Today, Vol. 24, no. 4 (2003).
[13] ST第三代碳化矽技術問世,瞄準汽車與工業市場應用。取自CTIMES網站
https://www.ctimes.com.tw/DispArt/tw/SiC/ST/%E6%84%8F%E6%B3%95%E5%8D%8A%E5%B0%8E%E9%AB%94/GaN/ST/22031414337W.shtml
[14] S. K. Nayar, and Y. Nakagawa, “Shape from focus: An effective approach for rough surfaces,” in Proceedings of the IEEE International Conference on Robotics and Automation, pp. 218-225 (1990).
[15] T. Takeshita, Y. Nakajima, M. K. Kim, S. Onogi, M. Mitsuishi, and Y. Matsumoto, “3D Shape Reconstruction Endoscope using Shape from Focus,” in VISAPP (1), pp. 411-416 (2009).
[16] 邱盟賀,「以指數校正法改善陰影對聚焦成形術的影響」,國立中央大學,碩士論文,民國110年。
[17] 陳俊霖,「司乃耳折射定律的推廣與應用」,物理教育學刊,民國96年。
[18] 變焦鏡頭。取自WIKIPEDIA網站
https://en.wikipedia.org/wiki/Zoom_lens
[19] 光學成像原理之景深。取自CSDN網站
https://blog.csdn.net/mingjinliu/article/details/103648118
[20] E. Manaf, K. Fitzgerald, C. L. Higginbotham, and J. G. Lyons, “Computer Vision System: Measuring Displacement and Bending Angle of Ionic Polymer-Metal Composites,” Applied Sciences, Vol. 12, no. 13, pp. 6744 (2022).
[21] 遠心設計主題。取自Edmund Optics公司網站
https://www.edmundoptics.com.tw/knowledge-center/application-notes/imaging/telecentric-design-topics/
[22] 淺談遠心鏡頭。取自URVISION公司網站
https://www.urvision-tw.com/article_detail/23.htm
[23] I. Sobel, and G. Feldman, “A 3x3 isotropic gradient operator for image processing,” A talk at the Stanford Artificial Project, pp. 271-272 (1968).
[24] CCD攝影機。取自APO STAR公司網站
https://www.apostar.com.tw/products/fd8cd572.php
[25] 遠心鏡頭。取自VS TECHNOLOGY公司網站
https://www.vsttw.com/products/list/1
[26] 顯微物鏡。取自NOVOFLEX公司網站
https://www.novoflex.de/en/products-637/macro/focusing-racks/focusstacking-accessories/mitutoyo-m-plan-apo-20x-microscope-lens.html
[27] 鹵素燈泡。取自Indian Mart公司網站
https://m.indiamart.com/proddetail/philips-24v-250w-13163-gz6-35-halogen-ref-lamp-23377392997.html
[28] 線性移動平台。取自Zolix公司網站
https://www.zolix.com.cn/Product_desc/1107_1387.html
[29] J. C. Goulet-Pelletier, and D. Cousineau, “A review of effect sizes and their confidence intervals, Part I: The Cohen’sd family,” The Quantitative Methods for Psychology, Vol. 14, no. 4, pp. 242-265 (2018).
[30] K. W. Fulford, D. A. Yager-Elorriaga, S. Patel, M. M. Montoya, K. Chandler, and M. A. Gilmore, “High-resolution fiber imaging for pulsed power experiments,” Review of Scientific Instruments, Vol. 93, no. 10 (2022).
[31] 洪嘉澤,「波長調制外差駐波干涉儀應用於位移量測」,國立中央大學,碩士論文,民國108年。 |