ཎᏊᒙሁ✚ἲ䜢⏝䛔䛯䝘䝜㟁Ꮚ䝕䝞䜲䝇 Keyword : ALDᡂ⭷ᢏ⾡䚸High-k⤯⦕⭷䚸䝯䝰䝸䚸䝖䝷䞁䝆䝇䝍 ⊂❧⾜ᨻἲே㻌 ≀㉁䞉ᮦᩱ◊✲ᶵᵓ ᄂᆮỉ Ꮡ 䝇䝬䞊䝖䝁䝭䝳䝙䝔䜱䞊䜢ᐇ⌧䛩䜛䛯䜑䛻䛿䚸ከ䛟䛾ሗ㔞䜢ฎ⌮䛩䜛䛯䜑䛾ከᵝ䛺㟁Ꮚ䝕䝞 䜲䝇䛜ᮃ䜎䜜䚸䛭䛾୰䛻䛿㧗㞟✚䛧䛯䝘䝜㟁Ꮚ䝕䝞䜲䝇䜒ྵ䜎䜜䛶䛔䜛䚹䝘䝜㟁Ꮚ䝕䝞䜲 䝇䛿3ḟඖᵓ㐀䛜ὶ䛻䛺䜚䚸㟁ᴟཬ䜃⤯⦕⭷䜒䝘䝜䜸䞊䝎䞊䛷ไᚚ䛩䜛ᚲせ䛜䛒䜛䚹 ᄂᆮỉ ཀྵẟ 㟁ᴟ⭷ཬ䜃⤯⦕⭷䛾ᙧᡂ䛻⏝䛔䜙䜜䛶䛝䛯ᚑ᮶䛾ᡂ⭷ᢏ⾡䛻௦䜟䛳䛶䚸ཎᏊᒙሁ✚ᒙ (ALD)ἲ䛿䚸䜸䞁䜾䝇䝖䝻䞊䝮䜸䞊䝎䛷⭷ཌไᚚ䛷䛝䚸䛧䛛䜒ᐊ 䛷䜒⭷ᙧᡂ䛷䛝䜛Ⅼ䜢 ᭷䛧䛶䛔䜛䚹ᮏ◊✲䛷䛿䚸ప ᗘ䛾ALDἲ䛷స〇䛧䛯䝖䝷䝆䝇䝍⏝High-k䝀䞊䝖⤯⦕⭷ཬ䜃 䜸䞊䝹High-kᒙ䛾䝏䝱䞊䝆䝖䝷䝑䝥䝯䝰䝸䞊䛾≉ᛶ䛻䛴䛔䛶ሗ࿌䛩䜛䚹 இέᇢᄂᆮἚἦἕἁἋ 䝖䝷䞁䝆䝇䝍⏝High-k⭷ " Fresh Pt Program 50 ! 40 (Ta/Nb)Ox E = 15MV/cm " # Voltage (V) Al2O3 P-Si $ Anatase-TiO2 30 20 (Ta/Nb)Ox HfAlO 10 0 ཎᏊᒙሁ✚ἲ ⾲㠃྾╔ᛂᚊ㏿ ཎᩱ䜺䝇 HfO2C) Target Al2O3 k- value Capacitance (PF/cm2) 䝏䝱䞊䝆䝖䝷䝑䝥䝯䝰䝸 HfSiO HfO2a) HfO2 b) Al2O3 a) Amorphous, b) Monoclinic, c) Cubic 0 200 400 600 800 1000 1200 Process temperature (ºC) ཎᏊᒙሁ✚ἲ䜢⏝䛔䛶䚸ప ᗘ䛷㧗ㄏ㟁⋡䛺 (Ta/Nb)Oxཬ䜃Anatase-TiO2⭷䜢ᙧᡂ䛷䛝䛯䚹 䜸䞊䝹High-kᒙ䛾䝏䝱䞊䝆䝖䝷䝑䝥䝯䝰䝸䛷䚸Ⰻ ዲ䛺䝥䝻䜾䝷䝮≉ᛶ䛜ᚓ䜙䜜䛯䚹 ALD⭷ ᡂ⭷㏿ᗘ䠖 䡚1 nm/cycle ᡂ⭷ ᗘ䠖 r. t. 䡚 300 qC ᇶᯈ ૨ᴾ ྂᴾ 㻌 㻌T. Nabatame et al., J. Vac. Sci. Technol. B 32 (2014) 03D121-1. 㻌 T. Nabatame et al., Thin Solid Films 520 (2012) 3387-3391. 㻌 S. Aikawa, T. Nabatame, K. Tsukagoshi, Appl. Phys. Lett. 103 (2013) 172105-1. ࣖဇЎƱʻࢸƷޒ ܱဇ҄ǁӼƚƨᛢ᫆ z㻌 ᚑ᮶䛾䝅䝸䝁䞁ཬ䜃䜺䝷䝇ᇶᯈ䛾㟁Ꮚ䝕䝞䜲䝇䛾 z㻌 ప䝁䝇䝖䛷㠃✚ᙧᡂ䛜ྍ⬟䛸䛺䜛ALDཎᩱཬ䜃 䛻䚸䝋䞊䝷䞊䝉䝹䛾High-k䝟䝅䝧䞊䝅䝵䞁⭷ཬ䜃䝣䝺 ALD⨨䛾㛤Ⓨ 䜻䝅䝤䝹ᇶᯈ䛾᭷ᶵ䝕䝞䜲䝇䛜ᣲ䛢䜙䜜䜛 z㻌 ᭦䛺䜛䝯䝰䝸䠃䝖䝷䞁䝆䝇䝍≉ᛶྥୖ䛾䛯䜑䛻䚸㧗 z㻌 ≉チ1௳ ㄏ㟁⋡䛺High-kᮦᩱཬ䜃㟁ᴟᮦᩱ䛾㛤Ⓨ MANA䝣䜯䜴䞁䝗䝸㻌 ⏕⏣┠㻌 ಇ⚽ E-mail : NABATAME.Toshihide䖃nims.go.jp URL : http://www.nims.go.jp/nfs/2dnano㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 — 260 —
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