研究生: |
呂佳峰 |
---|---|
論文名稱: |
絕緣層對於SrBi2Ta2O9鐵電場效應電晶體(Metal/Ferroelectric/Insulator/Si) 特性影響之研究 |
指導教授: |
胡塵滌
Chen-Ti Hu |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 材料科學工程學系 Materials Science and Engineering |
論文出版年: | 2004 |
畢業學年度: | 92 |
語文別: | 中文 |
論文頁數: | 117 |
中文關鍵詞: | 鐵電 、絕緣層 、電晶體 、記憶體 |
外文關鍵詞: | SBT, ferroelectric, MFIS, insulator |
相關次數: | 點閱:1 下載:0 |
分享至: |
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
本論文共分為四部分,第一部份探討以不同厚度的Si3N4作為SBT與Si間的擴散阻絕層,其對SBT鐵電性質的影響。由實驗結果發現Si3N4無法阻擋Si與SBT間的擴散,同時由於Si3N4本身存在內應力及容易捕捉載子的特性,因此造成鐵電記憶視窗的大幅縮減,所以可知Si3N4並不適合作為1T-FeRAM的buffer layer。
第二部分與第一部份相似,只不過把擴散阻絕層由Si3N4置換成SiO2,同樣探討SiO2對SBT鐵電性質的影響。由這一部份的結論可知Si3N4如同SiO2一樣,無法完全阻擋Si與SBT間的擴散,但較厚的SiO2能夠使SBT忍受較長熱處理時間而不置於明顯劣化,但太厚的SiO2將使SBT無法獲得足夠電場發生極化,因此仍會造成記憶視窗的減小,因此SiO2依然不適合作為1T-FeRAM的buffer layer。
第三部分仍延續之前的研究,只不過把擴散阻絕層材料再次改變成為HfO2。由實驗結果可知,HfO2雖然無法完全阻擋Si與SBT間的擴散,但阻絕效果比起Si3N4及SiO2來得更好,同時其記憶視窗更遠比以Si3N4及SiO2為擴散阻絕層試片來得大,這表示SBT能夠得到足夠的電場產生極化,所以HfO2應適合作為1T-FeRAM的buffer layer材料。
最後一部分分別將三種不同材料做一比較,由這一部分及以上結果不難得到,以HfO2為擴散阻絕層試片,在各項性質上均優於其他兩種材料,因此HfO2或許是將來1T-FeRAM上一個重要的材料。
參考文獻
(1)鄭晃忠,史德智, “極大型積體電路之鐵電材料”,電子月刊, 第五卷第六期, 1999年6月
(2)陳銘森, “鎳酸鑭電極對鋯鈦酸鉛溶凝膠製作與特性影響之研究” ,清華大學,博士論文,(1996)
(3)Ismunandar and Brendan J. Kennedy , “Structure of ABi2Nb2O9(A=Sr,Ba): Refinement of Powder Neutron Diffraction Data” J.Solid State Chem.,126 p135(1996)
(4)楊閔智, “溶凝膠法製作SrBi2Ta2O9鐵電薄膜研究” ,清華大學, 碩士論文 , p3-7 , (2001)
(5)S.Y.Wu, IEEE Trans. Electron Devices ED21,(1974)
(6M.Ueno,O.Kaneda,T.Ishikawa,K.Yamada,A.Yamada,M.Kimata,and M.Nanoshita,SPIE infrared Technol.XXI,p2552,636(1995)
(7)Y. Fukuda, K. Aoki, K. Numata, and A. Nishimura, Japan. J. Appl. Phys. 33,p5255(1994)
(8)彭成鑑, 強介電陶瓷材料在動態隨機記憶體上的應用, 工業材料, 107, (1995)
(9)呂正傑 詹世雄, 鐵電記憶體簡介, 毫微米通訊第五卷第四期
(10)陳三元, 強介電薄膜之液相化學法製作, 工業材料, 108, (1995)
(11)Jeong Soo Lee, Hyun Ja Kwon, S. J. Hyun, and T. W. Noh, “Structure characterization of the low-temperature phase in Sr-Bi-Ta-O films” , Appl. Phys. Lett. 74 pp.2690-2692 (1999)
(12)Mark A. Rodriguez, Timothy J. Boyle, Bernadette A. Hernandez, Catherine D. Buchheit, and Michael O. Eatough, “Formation of SrBi2Ta2O9 : Part1. Evidence of a bismuth-deficient pyrochlore phase” J. Mater. Res. Vol.11 pp.2282-2287 (1996)
(13)Chung-Hsin Lu, Bu-Kuan FANG and Cheng-Yen WEN, “Structure Identification and Electrical Properties of the New Pyrochlore Phase in the Sr-Bi-Ta-Ti-O system” Jpn. J. Appl. Vol.39 pp.5573-5576 (2000)
(14)Ichiro KOIWA, Yukihisa OKADA, Juro MITA, Akira HASHIMOTO and Yoshihiro SAWADA, “Role of Excess Bi in SrBi2Ta2O9 Thin Film Prepared Using Chemical Liquid Deposition and Sol-Gel Method” Jpn. J. Appl. Phys. Vol.36 pp.5904-5907 (1997)
(15)Tetsuya OSAKA, Akira SAKAKIBARA, Tomonori SEKI, Sachiko ONO, Ichiro KOIWA and Akira HASHIMOTO, “Phase Transition in Ferroelectric SrBi2Ta2O9 Thin Films with Change of Heat-treatment Temperature” Jpn. J.Appl. Phys. Vol.37 pp.597-601 (1998)
(16)Timothy J. Boyle, Catherine D. Buchheit, Mark A. Rodriguez, Husam N. Al-Shareef, and Bernadette A. Hernandez, “Formation of SrBi2Ta2O9 : Part 1. Synthesis and characterization of a novel “sol-gel” solution for production of ferroelectric SrBi2Ta2O9 thin film”J. Mater. Res. Vol. 11 pp.2274-2281 (1996)
(17)C. S. Byun, Y. I. Kim, W. J. Lee and B.W. Lee, “ Effect of a TiO2 Buffer Layer on the C- V Properties of Pt/PbTiO 3/TiO 2/Si Structure”, Jpn. J. Appl. Phys. Vol.36, (1997), p.5588
(18)H.N. Lee, and Y. T. kim, J. Korean Phys. Soc. 34 (1999), p454
(19)J.P Han and T. P. Maa, “SrBi2Ta2O9 memory capacitor on Si with a silicon nitride buffer”, Appl. Phys. L. Vol.72, No.10,(1998), p.1185
(20)S.B. Xiong and S. Sakai, “Memory properties of SrBi2Ta2O9 thin films prepared on SiO2/Si substrates”, Appl. Phys. L., Vol.75, No.11, (1999) p.1613
(21)Tadahiko Hirai, Yoshihide Fujisaki, Kazuhito Nagashima, Hiroshi Koike and Yasuo Tarui, “Preparation of SrBi2Ta2O9 Film at Low Temperatures and Fabrication of a Metal/Ferroelectric/Insulator /Semiconductor Field Effect Transistor Using Al/SrBi2Ta2O9/CeO2 /Si(100) Structures”, Jpn. J. Appl. Phys. Vol.36(1997) 5908-5911
(22)Kyu-Jeong Choi, Woong-Chul Shin, Jung-Hwan Yang, and Soon-Gil Yoona),“Metal/ferroelectric/insulator/semiconductor structure of Pt/SrBi2Ta2O9/YMnO3/Si using YMnO3 as the buffer layer”, Appl Phys. L. Vol.75 p.722.(1999)
(23)Chao-Hsin Chien, Ding-Yeong Wang, Ming-Jui Yang, Peer Lehnen, Ching-Chich Leu, Shiow-Huey Chuang,Tiao-Yuan Huang, “High -Performance Pt/SrBi2Ta2O9/HfO2/Si Structure for Nondestructive Readout Memory”, IEEE ELECTRON DEVICE LETTERS, VOL. 24, NO. 9. p722,(2003)
(24)Ban-Chiang Lan, Chih-Yuan Huang, and San-Yuan Chen, “Physical characteristics and electrical properties of Sr0.8Bi2+xTa2O9 films on Al2O3/Si annealed at high temperature”, J. Appl. Phys. Vol.94(2003) p6735
(25)Kazuo Sakamaki, Tadahiko Hirai, Takumi Uesugi, Hiroshi Kishi and Yasuo Tarui, “Characteristics of a Metal/Ferroelectric/Insulator /Semiconductor Structure Using an Ultrathin Nitrided Oxide Film as the Buffer Layer”, Jpn. J. Appl. Phys. Vol.38(1999) L451-L453
(26)Minoru Noda, Kazushi Kodama, Itaru Ikeuchi, Mitsue TAKAHASHI and Masanori Okuyama, “A Significant Improvement in Memory Retention of Metal-Ferroelectric-Insulator- Semiconductor Structure for One Transistor-Type Ferroelectric Memory by Rapid Thermal Annealing”, Jpn. J. Appl. Phys. Vol.38(1999) L451-L453
(27)Won-Jae Lee, Chang-Ho Shin, Chae-Ryong Cho, Jong-Sun Lyu, Bo-Woo Kim, Byoung-Gon Yu and Kyoung-Ik Cho, “Electrical Properties of SrBi2Ta2O9/Insulator/Si Structures with Various Insulators”, Jpn. J. Appl. Phys. Vol.38(1999) 2039-2043
(28)Masahiko Maeda and Koichi Ikeda, “Stress evaluation of radio-frequency-biased plasma-enhanced chemical vapor deposited silicon nitride films”, J. Appl. Phys. Vol.83(1998) p3865
(29)Peter I. L. Smeys, Peter B. Griffin, and Krishna C. Saraswat, “Material properties of low pressure chemical vapor deposited silicon nitride for modeling and calibrating the simulation of advanced isolation structures”, J. Appl. Phys. Vol.78(1995) p2873
(30)S. M. Hu. “Stress-related problems in silicon technology”, J. Appl. Phys. Vol.70(6) ,(1991) R53
(31)Kenji Okada, “Soft breakdown of oxide–nitride–oxide stacked gate dielectrics used in metal–oxide–nitride–oxide–silicon-based flash memories”, Appl. Phys. L., Vol.83, No.26, (2003) p.5542
(32)A. K. Sinha, H. J. Levinstein, T. E. Smith, G. Quintana, and S. E. Haszko, J. Electrochem. Soc. 125, 601 (1968)
(33)T. L. Chu, J. R. Szedon, and C. H. Lee, Sloid State Electron. 10, 897 (1967)
(34)M. Lim and T.S. Kalkur, “The Role of Leakage Current on the Memory Window and Memory Retention in MFIS Structure”, Integrated Ferroelectric, Vol.22, (1998), p.205
(35)H. Daniel Chen, K. R. Udayakumar, Kewen K. Li, Christopher J. Gaskey, and L. Eric Cross, “Dilectric breakdown strength in sol-gel device PZT thick films”, Integrated Ferroelectric, Vol.15, (1997), p.89
(36)I. L. Baginski, V. G. Erkov, E. G. Kostov and A. A. Likachev, Thin Solid Films, Vol.202, p191 (1992)
(37)Chia-Hsing Huang, Tseung-Yuen Tseng, Chao-Hsin Chien, Ming-Jui Yang, Ching-Chich Leu, Ting-Chang Chang, Po-Tsun Liu, Tiao-Yuan Huang. “Electrical properties of metal–ferroelectric- insulator–semiconductor using sol–gel derived SrBi2Ta2O9 film and ultra-thin Si3N4 buffer layer”, Thin Solid Films, 420-421, p377-381 (2002)
(38)S. L. Miller and P. J. McWhorter, “Physics of the ferroelectric nonvolatile memory field effect transistor”, J. Appl. Phys. Vol.72(12) ,(1992) 5999
(39)Sung Kyun Lee, Yong Tae Kim, and Seong-ll Kim, “Effects of coercive voltage and charge injection on memory windows of metal-ferroelectric-semiconductor and metal-ferroelectric-insulator- semiconductor gate structures”, J. Appl. Phys. Vol.91(11) ,(2002) p9303
(40)H.S. Choi, E. H. Kima,I.H. Choi, Y. T. Kimb,J.H. Choi, J. Y. Lee, “The effect Of ZrO2 buffer layer on electrical property in Pt/ SrBi2Ta2O9/ZrO2/Si ferroelectric gate oxide structure”, thin solid film, 388,(2001), p.226
(41)H.S. Choi, Y. T. Kim, S. kim and I.H. Choi, “Effect characteristics of Pt/SrBi2Ta2O9/Ta2O5/Si using Ta2O5 as the buffer layer”,Jpn. J. Appl. Phys. Vol.40, (2001), p.2940