JP4399521B2 - キャパシタ、キャパシタ用電極、集積回路キャパシタ、及びそれらの製造方法 - Google Patents
キャパシタ、キャパシタ用電極、集積回路キャパシタ、及びそれらの製造方法 Download PDFInfo
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- JP4399521B2 JP4399521B2 JP2002566534A JP2002566534A JP4399521B2 JP 4399521 B2 JP4399521 B2 JP 4399521B2 JP 2002566534 A JP2002566534 A JP 2002566534A JP 2002566534 A JP2002566534 A JP 2002566534A JP 4399521 B2 JP4399521 B2 JP 4399521B2
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- 239000003990 capacitor Substances 0.000 title claims abstract description 114
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000010948 rhodium Substances 0.000 claims abstract description 99
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims abstract description 85
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 65
- 238000000034 method Methods 0.000 claims abstract description 50
- SJLOMQIUPFZJAN-UHFFFAOYSA-N oxorhodium Chemical compound [Rh]=O SJLOMQIUPFZJAN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910003450 rhodium oxide Inorganic materials 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims description 42
- 229910052760 oxygen Inorganic materials 0.000 claims description 30
- 229910052454 barium strontium titanate Inorganic materials 0.000 claims description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 22
- 229910000510 noble metal Inorganic materials 0.000 claims description 22
- 239000001301 oxygen Substances 0.000 claims description 22
- 238000005229 chemical vapour deposition Methods 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 20
- 229910045601 alloy Inorganic materials 0.000 claims description 18
- 239000000956 alloy Substances 0.000 claims description 18
- 238000000151 deposition Methods 0.000 claims description 15
- 230000001590 oxidative effect Effects 0.000 claims description 14
- 239000002243 precursor Substances 0.000 claims description 14
- 229910001260 Pt alloy Inorganic materials 0.000 claims description 11
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229920005591 polysilicon Polymers 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 150000002736 metal compounds Chemical class 0.000 claims description 3
- 239000007800 oxidant agent Substances 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000003989 dielectric material Substances 0.000 claims description 2
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 claims description 2
- 229910001936 tantalum oxide Inorganic materials 0.000 claims description 2
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical group COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052797 bismuth Inorganic materials 0.000 claims 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000007740 vapor deposition Methods 0.000 claims 1
- 229910000629 Rh alloy Inorganic materials 0.000 abstract description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 24
- 239000010408 film Substances 0.000 description 12
- 238000009792 diffusion process Methods 0.000 description 10
- 229910052697 platinum Inorganic materials 0.000 description 10
- 230000004888 barrier function Effects 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 7
- 230000008021 deposition Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 150000003284 rhodium compounds Chemical class 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052735 hafnium Inorganic materials 0.000 description 2
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 2
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(iv) oxide Chemical compound O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000484 niobium oxide Inorganic materials 0.000 description 2
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 229910001925 ruthenium oxide Inorganic materials 0.000 description 2
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- XZPXMWMVWDSEMY-UHFFFAOYSA-N 2,2,3-trimethyloctane Chemical compound CCCCCC(C)C(C)(C)C XZPXMWMVWDSEMY-UHFFFAOYSA-N 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- JJKJCBYYLPGLPU-UHFFFAOYSA-N C[Pt+2]C1C=CC=C1 Chemical compound C[Pt+2]C1C=CC=C1 JJKJCBYYLPGLPU-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 108010000020 Platelet Factor 3 Proteins 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910008484 TiSi Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229960001730 nitrous oxide Drugs 0.000 description 1
- 235000013842 nitrous oxide Nutrition 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 229910006400 μ-Cl Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/60—Electrodes
- H01L28/75—Electrodes comprising two or more layers, e.g. comprising a barrier layer and a metal layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28568—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table the conductive layers comprising transition metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/55—Capacitors with a dielectric comprising a perovskite structure material
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Semiconductor Memories (AREA)
- Semiconductor Integrated Circuits (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Wrappers (AREA)
- Chemical Vapour Deposition (AREA)
- Electrodes Of Semiconductors (AREA)
Description
Claims (47)
- 集積回路内のキャパシタであって、
貴金属、合金、金属化合物、多結晶シリコン及びそれらの組合せからなるグループから選択された物質で構成され、プラグに接触した第1導電層と、
該第1導電層に接触し、厚さが20nm〜100nmであり、50原子%を超えるRhを含有する高ロジウム構造と、
厚さが1nm〜20nmであり、前記高ロジウム構造と直接接触した酸化ロジウム層と、
該酸化ロジウム層と直接接触したキャパシタ誘電体層と、
該キャパシタ誘電体層上に形成され、50原子%を超えるRhを含有する貴金属合金層で構成された上部電極と
を備えたキャパシタ。 - 前記貴金属合金層が、Rh−Pt合金で構成されている、請求項1に記載のキャパシタ。
- 前記上部電極が、前記キャパシタ誘電体層と、前記上部電極との間に、第2の酸化ロジウム層を含む、請求項1に記載のキャパシタ。
- それぞれの前記酸化ロジウム層の厚さが、1nm〜20nmである、請求項3に記載のキャパシタ。
- 前記上部電極の厚さが、20nm〜100nmである、請求項1に記載のキャパシタ。
- 前記キャパシタが、コンテナ形に形成されている、請求項1に記載のキャパシタ。
- 前記キャパシタが、スタッド形に形成されている、請求項1に記載のキャパシタ。
- 前記キャパシタ誘電体層が、5を超える誘電率を有する材料で構成されている、請求項1に記載のキャパシタ。
- 前記キャパシタ誘電体層が、10を超える誘電率を有する材料で構成されている、請求項1に記載のキャパシタ。
- 前記キャパシタ誘電体層が、20を超える誘電率を有する材料で構成されている、請求項1に記載のキャパシタ。
- 前記キャパシタ誘電体層が、チタン酸バリウムストロンチウム(BST)で構成されている、請求項1に記載のキャパシタ。
- 前記BSTの厚さが、8nm〜40nmである、請求項11に記載のキャパシタ。
- 前記キャパシタ誘電体層が、酸化タンタル(Ta2O5)を含む、請求項1に記載のキャパシタ。
- 前記Ta2O5の厚さが、3nm〜20nmである、請求項13に記載のキャパシタ。
- 一連の層からなるキャパシタ用電極であって、
少なくとも70原子%のRhを含有するRh−Pt合金である貴金属合金で構成された第1の層と、
50原子%を超えるRhを含む第2の層と
を備えたキャパシタ用電極。 - 前記第1の層の厚さが、20nm〜100nmである、請求項15に記載のキャパシタ用電極。
- 5を超える誘電率を有する誘電体層と、
該誘電体層と接触した電極とを備え、
該電極が、少なくとも70原子%のRhを含有するRh−Pt合金で構成された高ロジウム構造を含む
集積回路キャパシタ。 - ポリシリコンプラグを介して、下層の半導体基板と電気的に接続している状態に形成された、請求項17に記載の集積回路キャパシタ。
- 少なくとも70原子%のRhを含有するRh−Pt合金で構成された高ロジウム層を成膜するステップ、および
該高ロジウム層の上に、5を超える誘電率を有する誘電体層を成膜するステップ
を含む集積回路の製造方法。 - 前記誘電体層の上に、少なくとも70原子%のRhを含有するRh−Pt合金で構成された第2の高ロジウム層を成膜するステップをさらに含む、請求項19に記載の集積回路の製造方法。
- それぞれの前記高ロジウム層のRh含有量が、96原子%を超えている、請求項20に記載の集積回路の製造方法。
- 前記誘電体層を成膜する前に、前記高ロジウム層の上に、直接酸化ロジウム層を成膜するステップをさらに含む、請求項19に記載の集積回路の製造方法。
- 前記第2の高ロジウム層を成膜する前に、前記誘電体層の上に、直接酸化ロジウム層を成膜するステップをさらに含む、請求項20に記載の集積回路の製造方法。
- 集積回路用のキャパシタを形成する方法であって、
所定のキャパシタ形状を形成するステップと、
該キャパシタ形状に合致するように、貴金属、合金、金属化合物、ポリシリコン及びそれらの組合せからなるグループから選択された物質で構成された第1導電層を形成するステップと、
前記キャパシタ形状に合致するように、50原子%を超えるRhを含有する高ロジウム構造を前記第1導電層上に形成するステップと、
該高ロジウム構造の上に、直接酸化ロジウム層を形成するステップと、
高い誘電率を有する誘電体層を、直接前記酸化ロジウム層の上に成膜するステップと、
前記誘電体層の上に、直接酸化ロジウム層を形成するステップと、
50原子%を超えるRhと他の貴金属との合金で構成された高ロジウム構造を、前記誘電体層上の酸化ロジウム層の上に形成するステップと
を含むキャパシタの形成方法。 - 前記第1導電層上の前記高ロジウム構造及び前記酸化ロジウム層上の前記高ロジウム構造のうちの少なくとも1方のRh含有量が、96原子%を超えている、請求項24に記載のキャパシタの形成方法。
- 前記第1導電層上の前記高ロジウム構造及び前記酸化ロジウム層上の前記高ロジウム構造のうちの少なくとも1方を形成するステップを、化学気相成長法によって行う、請求項24に記載のキャパシタの形成方法。
- 前記化学気相成長法が、有機金属化学気相成長(MOCVD)法である、請求項26に記載のキャパシタの形成方法。
- 前記MOCVD法で使用される前駆体ガスが、Rh(η5−C5H5)(CO)2とN2Oである、請求項27に記載のキャパシタの形成方法。
- 前記MOCVDにおける成膜温度が、200℃〜550℃である、請求項28に記載のキャパシタの形成方法。
- 前記第1導電層上に形成された前記高ロジウム構造が、Rhと他の貴金属との合金で構成されている、請求項24に記載のキャパシタの形成方法。
- 前記第1導電層上の前記高ロジウム構造の上に、直接酸化ロジウム層を形成するステップが、前記高ロジウム構造の上面を酸化する処理を含む、請求項24に記載のキャパシタの形成方法。
- 前記誘電体層の上に、直接酸化ロジウム層を形成するステップが、最初に金属ロジウム層を成膜し、次いで該金属ロジウム層全体を酸化する処理を含む、請求項24に記載のキャパシタの形成方法。
- 前記酸化する処理が、O、O2、NO、N2OおよびH2Oからなるグループから選択された、酸素を含む雰囲気に、前記金属ロジウム層を曝露することを含む、請求項32に記載のキャパシタの形成方法。
- 前記酸化する処理が、300℃〜800℃の温度で実施される、請求項33に記載のキャパシタの形成方法。
- 前記酸化ロジウム層を形成するステップが、化学気相成長を含む、請求項24に記載のキャパシタの形成方法。
- 前記化学気相成長による処理において、Rh(η5−C5H5)(CO)2ガス及び酸化剤を使用する、請求項35に記載のキャパシタの形成方法。
- 前記化学気相成長が、200℃〜550℃で実施される、請求項36に記載のキャパシタの形成方法。
- 前記誘電体層を成膜するステップが、前駆体Ba(DPM)2(tet)、Sr(DPM)2(tet)およびTi(O−i−C3H7)4を使用したチタン酸バリウムストロンチウム(BST)の化学気相成長を含み、DPMがビス(ジピバロイルメタナト)であり、tetがテトラグリムである、請求項24に記載のキャパシタの形成方法。
- 前記化学気相成長が、400℃〜700℃で実施され、続いて、BSTが、酸素を含む雰囲気中で400℃〜650℃でアニールされる、請求項38に記載のキャパシタの形成方法。
- 前記誘電体層を成膜するステップが、前駆体Ba(thd)2およびSr(thd)2、ならびにTi(イソプロポキシ)2(thd)2またはTi(O−i−Pr)2(thd)2を使用したチタン酸バリウムストロンチウム(BST)の化学気相成長を含み、thdがテトラメチルヘプタンジオナートである、請求項24に記載のキャパシタの形成方法。
- 前記化学気相成長が、500℃〜800℃で実施され、続いて、BSTが、酸素を含む雰囲気中で400℃〜650℃でアニールされる、請求項40に記載のキャパシタの形成方法。
- 前記誘電体層を成膜するステップが、ArとO2の混合ガス中で、Ba0.5Sr0.5TiO3で構成されたターゲットを、高周波マグネトロンによりスパッタリングし、前記チタン酸バリウムストロンチウム(BST)を形成することを含む、請求項24に記載のキャパシタの形成方法。
- 急速熱処理装置(RTP)を使用して、N2環境中で1分間、BSTをアニールするステップをさらに含む、請求項42に記載のキャパシタの形成方法。
- 前記誘電体層を成膜するステップが、ヘリウムによって運ばれたTa(OC2H5)5ガスを使用して、酸化タンタル(TaOx)を形成する化学気相成長を含む、請求項24に記載のキャパシタの形成方法。
- 前記化学気相成長が、350℃〜550℃で実施される、請求項44に記載のキャパシタの形成方法。
- 前記TaOxを、400℃〜500℃で、紫外光の中で、30秒〜10分間、O2またはO3雰囲気中でアニールするステップをさらに含む、請求項45に記載のキャパシタの形成方法。
- 前記TaOxを、700℃〜850℃で、10分〜2時間、酸素または水蒸気雰囲気中でアニールするステップをさらに含む、請求項45に記載のキャパシタの形成方法。
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US09/789,335 US6518610B2 (en) | 2001-02-20 | 2001-02-20 | Rhodium-rich oxygen barriers |
PCT/US2002/004090 WO2002067302A2 (en) | 2001-02-20 | 2002-02-11 | Rhodium-rich oxygen barriers |
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US20040212002A1 (en) | 2004-10-28 |
US20030102501A1 (en) | 2003-06-05 |
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EP1368822A2 (en) | 2003-12-10 |
WO2002067302A2 (en) | 2002-08-29 |
WO2002067302A3 (en) | 2003-10-16 |
DE60216241T2 (de) | 2007-04-19 |
WO2002067302A8 (en) | 2004-06-03 |
EP1368822B1 (en) | 2006-11-22 |
US6781175B2 (en) | 2004-08-24 |
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US20020190303A1 (en) | 2002-12-19 |
CN100373543C (zh) | 2008-03-05 |
US7038263B2 (en) | 2006-05-02 |
US20020113260A1 (en) | 2002-08-22 |
ATE346377T1 (de) | 2006-12-15 |
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