論 文 摘 要
本研究目的為研究以晶圓接合技術應用於絕緣層上矽結構Silicon On Insulator(SOI)的各項性質,探討不同製程條件對接合界面之物理性質,包括鍵結強度、殘留應力、殘餘電荷等的影響。
本論文採用1000Å和3500Å兩種氧化層厚度,晶圓表面清洗方式則為親水性(SPM-M1)和斥水性(SPM-M2)兩種。經退火處理後之晶圓對,可發現其未鍵結區在退火後都可明顯縮小,且當氧化層愈厚時,其鍵結強度會隨之增加。同時,若經刀刃劈開之晶圓對,再次進行1000℃熱處理時,劈開之裂口將重新再癒合鍵結起來。另外,經歷過二次熱處理的SOI試片,其上層矽晶圓中,會殘留內壓應力,且當氧化層愈薄,殘留應力值會愈大。在SOI元件電性方面,可觀察到利用SOI製作MOSFET時,會比Bulk有較小的漏電流。由此實驗流程,可評估何種晶圓接合技術製作SOI時,可得到較佳之物裡性質,以利晶圓接合技術更廣泛地應用於微機電系統與積體電路系統中。
參考文獻
1. 1. Jan Haisma and G.A.C.M. Spierings, “Contact bonding, including direct-bonding in a historical and recent context of materials science and technology, physics and chemistry. Historical review in a broader scope and comparative outlook”, Materials Science and Engineering , R37, p.1~60, (2000).
2. Martin A. Schmidt, “Wafer-to-Wafer Bonding for Microstructure Formation”, Proceedings of the IEEE, 86. No.8, p.1575, (1998).
3. James B. Kuo and Ker-Wei Su, CMOS VLSI ENGINEERING:Silicon-on-Insulator (SOI), Kluwer Academic Publishers, p.1~11, (1998).
4. Andreas Plößl and Gertrud Kräuter, “Wafer Direct Bonding : tailoring adhesion between brittle materials”, Materials Science and Engineering, R25, p.1~88, (1999).
5. V.P.Popov, I.V.Antonova, A.A.Frantsuzov, “DeleCut: Producing High-Quality SOI Structures by Hydrogen Ion Implantation”, Russian Microelectronics, 31, p.232, (2002).
6. Niclas Keskitalo, Stefan Tiensuu, Anders Hallen, “Characterization of hydrophobic bonded silicon wafers”, Nuclear Instruments and Methods in Physics Reserch B, 186, p.66, (2002).
7. T. R. Chung, L. Yang, N. Hosoda, B. Takagi, T. Suga, “Wafer direct bonding of compound semiconductors and silicon at room temperature by the surface activated bonding method”, Appl. Surf. Sci., 117-118, p. 808, (1997).
8. T. R. Chung, L. Yang, N. Hosoda, T. Suga, “Room temperature GaAs-Si and InP-Si wafer direct bonding by the surface activated bonding method”, Nucl. Instrum. Methods Phys. Res. B, Beam Interact. Mater. At., 121, p. 203, (1997).
9. F. A. Kish, F. M. Steranka, D.C. DeFevere, D. A. Vanderwater, K. G. Park, C. P. Kuo, T. D. Osentowski, M. J. Peanasky, J. G. Yu, R. M. Fletcher, D. A. Steigerwald, M. G. Craford, V. M. Robbins, “Very high-efficiency semiconductor wafer-bonded transparent-substrate (AlxGa1–x)0.5In0.5P/GaP light-emitting diodes”, Appl. Phys. Lett., 64, p.2839, (1994).
10. J. H. Wang, M. S. Jin, V. H. Ozguz, S. H. Lee, “N-channel metal-oxide-semiconductor transistors fabricated in a silicon film bonded onto sapphire”, Appl. Phys. Lett., 64, p. 724, (1994).
11. K. Eda, M. Sugimoto, Y. Tomita, “Direct heterobonding of lithium niobate onto lithium tantalite”, Appl. Phys. Lett., 66, p.827, (1995).
12. Marin Alexe, Gerhard Kästner, Dietrich Hesse, and Ulrich Gösele, “Ferroelectric-semiconductor heterostructures obtained by direct wafer bonding”, Appl. Phys. Lett., 70, p.3416, (1997).
13. Q. –Y. Tong, R. Gafiteanu, U. M. Gösele, “Reversible Silicon Wafer Bonding for Surface Protection : Water-Enhanced Debonding”, J. Electrochem. Soc., 139, L.101 (1992).
14. R.G.Horn, J. Am. Ceram. Soc., 73, p.1117, (1990).
15. K.-T.Wan, D.T.Amith, B.R.Lawn, J. Am. Ceram. Soc., 75, p.667, (1992).
16. J. B. Lasky, S.R. Stiffler, F. R. White, and J. R. Abernathey, IEDM Tech. Dig., p. 648 (IEEE, New York, 1985).
17. J. B. Lasky, “Reversible Silicon Wafer Bonding for Surface Protection : Water-Enhanced Debonding”, Appl. Phys. Lett., 48, p.78, (1986).
18. M. Shimbo, K. Furukawa, K. Furuda, K. Tanzawa, “silicon-to-silicon direct bonding method”, J. Appl. Phys., 60(8), p.2987, (1986).
19. Q. –Y. Tong, X. -L. Xu, and H. Shen, “Diffusion and oxide viscous flow mechanism in SDB process and silicon wafer rapid thermal bonding”, Electronics Letters, 26, p.697, (1990).
20. K. –Y. Ahn, R. Stengl, T. Y. Tan, U. Gösele, “Stability of interfacial oxide layers during silicon wafer bonding”, J. Appl. Phys., 65, p.561, (1989).
21. H. Takagi, R. Maeda, T. R. Chung, and T. Suga, “Low-temperature direct bonding of silicon and silicon dioxide by surface activation method”, Sensors and Actuators, Sensors and Actuators, A70, p.164, (1998).
22. Q.-Y. Tong, U.Gösele, John Wiley & Sons, Inc. Publishers, p.178, (1999).
23. T. Iida, T. Itoh, D. Noguchi, Y. Takano, “Residual lattice strain in thin silicon-on-insulator bonded wafers: Thermal behavior and formation mechanisms”, J. Appl. Phys., 87, p.675-681, (2000).
24. James B. Kuo, Ker-Wei Su, CMOS VLSI ENGINEERING Silicon-on-insulator, p.121-131, (1998).
25. W.P. Masara, G. Goetz, A. Caviglia, and J.B. McKitterick, “Bonding of silicon wafers for silicon-on-insulator”, J. Appl. Phys., 64(10), p.4943-4950, (1988).
26. E. Kobeda, E.A. Irene,“A measurement of intrinsic SiO2 film stress resulting from low temperature thermal oxidation of Si”, J. Vac. Sci. Technol., B4(3), p.720-722, (1986).
27. Kiyoshi Mitani, Diego Feijoo, Giho Cha and Uirich Gösele, “A new evaluation method of silicon wafer direct bonding interfaces and bonding strength by KOH etching”, Jpn. J. App. Phys., 31, p.969, (1992).
28. 賴欣怡, 國立清華大學清材料所碩士論文, “晶圓直接接合製成物理及化學機制討論”, 民國九十二年六月
29. B. K. Ju, Y. H. Lee, K. H. Tchah, and M. H. Oh , “On the anisotropically etched bonding interface of directly bonded (100) silicon wafer pairs”, Microeletronics Journal, 142, p.547, (1995).
30. H. Camon, and Z. Moktadir, “Simulation of silicon etching with KOH”, J. Electrochem. Soc., 28, p. 509, (1997).
31. T. Suni, K. Henttinen, I. Suni, and J. Mäkinen, “Effects of Plasma Activation on Hydrophilic Bonding of Si and SiO2”, J. Electrochem. Soc., 149(6), p.G348-G351, (2002).
32. Johann Steinkirchner, Torsten Martini, Manfred Reiche, Gerhard Kästner, and Ulrich Gösele, “Silicon Wafer Bonding via Designed Monolayers”, Adv. Mater. 7, p.662-665, (1995).
33. M. Wiegand, M. Reiche, U. Gosele, K. Gutjahr, D. Stolze, R. Longwitz, E. Hiller , “ Wafer bonding of silicon wafers covered with various surface layers”, Sensors and Actuators A, 86, p91, (2000).
34. E.P. EerNisse,“Viscous flow of thermal SiO2”, Appl. Phys. Lett., 7(6), p.290-293, (1997).
35. E.P. EerNisse, G.F. Derbenwick,“Viscous Shear Flow Model For MOS Device Radiation Sensitivity”, IEEE Transactions on Nuclear Science, NS-23(6), p.1534-1539, (1976).
36. Q.-Y. Tong, U.Gösele,“Semiconductor Wafer Bonding Science and Technology”, John Wiley & Sons, Inc. Publishers, p.138, (1999).
37. E.H.Rhoderick, and R.H.Williams, “Metal-Semiconductor contacts” 2nd, Oxford Science Publications, p.11, (1988).