JP2007013200A - 電子デバイス材料の製造方法 - Google Patents
電子デバイス材料の製造方法 Download PDFInfo
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- JP2007013200A JP2007013200A JP2006231186A JP2006231186A JP2007013200A JP 2007013200 A JP2007013200 A JP 2007013200A JP 2006231186 A JP2006231186 A JP 2006231186A JP 2006231186 A JP2006231186 A JP 2006231186A JP 2007013200 A JP2007013200 A JP 2007013200A
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- gas
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- oxide film
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- 238000004519 manufacturing process Methods 0.000 title abstract description 41
- 239000000463 material Substances 0.000 title description 28
- 239000007789 gas Substances 0.000 claims abstract description 187
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 21
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 14
- 229920005591 polysilicon Polymers 0.000 claims abstract description 14
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 11
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims description 66
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 65
- 238000000034 method Methods 0.000 claims description 61
- 238000005121 nitriding Methods 0.000 claims description 40
- 238000010438 heat treatment Methods 0.000 claims description 23
- 230000015572 biosynthetic process Effects 0.000 claims description 20
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 15
- 229910052786 argon Inorganic materials 0.000 claims description 11
- 229910052743 krypton Inorganic materials 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000001307 helium Substances 0.000 claims description 7
- 229910052734 helium Inorganic materials 0.000 claims description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 7
- 238000009832 plasma treatment Methods 0.000 claims description 2
- 229910052681 coesite Inorganic materials 0.000 claims 1
- 229910052906 cristobalite Inorganic materials 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 229910052682 stishovite Inorganic materials 0.000 claims 1
- 229910052905 tridymite Inorganic materials 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 abstract description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000010408 film Substances 0.000 description 236
- 235000012431 wafers Nutrition 0.000 description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 14
- 229910052710 silicon Inorganic materials 0.000 description 14
- 239000010703 silicon Substances 0.000 description 14
- 238000011282 treatment Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000001678 irradiating effect Effects 0.000 description 5
- 150000004767 nitrides Chemical class 0.000 description 5
- 150000002831 nitrogen free-radicals Chemical class 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 229910052756 noble gas Inorganic materials 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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Abstract
【解決手段】酸素、および希ガスを含む処理ガスの存在下で、ウエハW上に平面アンテナ部材SPAを介してマイクロ波を照射することにより、酸素と希ガスとを含むプラズマ(ないし窒素と希ガスとを含むプラズマ、または窒素と希ガスと水素を含むプラズマ)を形成する。このプラズマを用いて前記ウエハ表面に酸化膜(ないし酸窒化膜)を形成し、必要に応じてポリシリコン等の電極を形成して電子デバイス構造を形成する。
【選択図】図1
Description
本発明の好適な一態様においては、O2および希ガスを少なくとも含む処理ガス(ないしは処理ガス雰囲気;以下同様)の存在下で、複数のスリットを有する平面アンテナ部材を介するマイクロ波照射に基づくプラズマを用いて、Siを主成分とする被処理基体の表面に酸化膜(SiO2膜)を形成することができる。
本発明において酸化膜形成の際には、処理ガスは、少なくともO2および希ガスを含む。この際に使用可能な希ガスは特に制限されず、公知の希ガス(ないしはその2種類以上の組合せ)から適宜選択して使用することができる。膜質の点からは、希ガスとしてクリプトン、アルゴン、またはヘリウムが好適に使用可能である。
本発明を酸化膜の形成に用いる態様においては、形成されるべき酸化膜の特性の点からは、下記の条件が好適に使用できる。
O2:5〜500sccm、より好ましくは50〜500sccm、
希ガス(例えば、Kr、Ar、またはHe):500〜3000sccm、より好ましくは500〜2000sccm、特に好ましくは1000〜2000sccm
温度:室温(25℃)〜700℃、より好ましくは200〜700℃、特に好ましくは200〜500℃
マイクロ波:0.5〜5W/cm2、より好ましくは0.5〜4W/cm2
本発明の製造方法において、形成されるべき酸化膜の特性の点からは、下記の各条件を好適な例として挙げることができる。
処理ガスの好適な一例:流量50〜500sccmのO2、および、流量500〜2000sccmのクリプトン、アルゴン、またはヘリウムを含むガス。
SiO2膜の形成時の温度の好適な一例:300〜700℃の温度が挙げられる。
SiO2膜形成の圧力の好適な一例として、2.7〜270Pa(20〜2000mTorr)が挙げられる。
SiO2膜の形成時のプラズマ好適な一例として、1〜4W/cm2の出力で形成されるプラズマ。
本発明においては、必要に応じて、平面アンテナ部材を介するマイクロ波照射に基づく窒化プラズマを用いることにより、SiO2酸化膜を好適に窒化することができる。この際に窒化すべきSiO2酸化膜は特に制限されないが、膜質、生産性の点からは、O2および希ガスを含む処理ガスの存在下で平面アンテナ部材を介するマイクロ波照射に基づくプラズマを用いて、Siを主成分とする被処理基体の表面に形成した下地酸化膜(SiO2膜)であることが好ましい。
本発明の上記したSiO2酸化膜の窒化の態様において、処理ガスは、少なくともN2と希ガスとを含む。この際に使用可能な希ガスは特に制限されず、公知の希ガス(ないしはその2種類以上の組合せ)から適宜選択して使用することができる。膜質の点からは、希ガスとしてクリプトン、アルゴン、またはヘリウムが好適に使用可能である。
本発明を酸化膜の形成に用いる態様においては、形成されるべき表面窒化の酸化膜の特性の点からは、下記の窒化条件が好適に使用できる。
N2:2〜500sccm、より好ましくは4〜200sccm
希ガス(例えば、Kr、Ar、またはHe):200〜2000sccm、より好ましくは500〜2000sccm、特に好ましくは1000〜2000sccm、
H2:1〜100sccm、より好ましくは2〜50sccm、特に好ましくは5〜30sccm
圧力:10〜3000mTorr、より好ましくは20〜1000mTorr、特に好ましくは50〜1000mTorr
マイクロ波:0.5〜4W/cm2、より好ましくは0.5〜3W/cm2
本発明の製造方法において、形成されるべき表面窒化の酸化膜の特性の点からは、下記の条件を好適な例として挙げることができる。
SiO2膜の窒化時の処理ガスの好適な一例:流量4〜200sccmのN2、および、流量500〜2000sccmのクリプトン、アルゴン若しくはヘリウムを含むガス;または、流量4〜200sccmのN2、流量500〜2000sccmのクリプトン、アルゴン若しくはヘリウム、および、流量2〜30sccmのH2を含むガス。
SiO2膜窒化時の圧力の好適な一例として、2.7〜135Pa(20〜1000mTorr)が挙げられる。
SiO2膜の窒化時のプラズマの好適な一例として、0.5〜3W/cm2の出力で形成されるプラズマ。
本発明においては、必要に応じて、SiO2膜またはSiON膜上に電極層を形成することができる。この電極層としては、デバイス特性の点からは、ポリシリコンまたはアモルファスシリコンまたはSiGeからなる電極層を好適に用いることができる。この際に用いる下地のSiO2膜またはSiON膜は特に制限されないがデバイス特性、生産性の点からは、O2および希ガスを少なくとも含む処理ガスの存在下で平面アンテナ部材を介するマイクロ波照射に基づくプラズマを用いて、Siを主成分とする被処理基体の表面に形成した下地酸化膜(SiO2膜);またはN2と希ガスとを少なくとも含む処理ガスの存在下で平面アンテナ部材を介するマイクロ波照射に基づくプラズマを用いて形成したSiON膜であることが好ましい。
本発明において使用可能な電極形成ガスは特に制限されず、形成すべき電極層の材質に応じて、公知の電極形成ガスのいずれか、またはそれらの2種以上の組合せから適宜選択して使用することができる。形成すべき電極がポリシリコンからなる場合には、デバイス特性、生産性の点からは、前記電極形成ガスがSiH4であることが好ましい。この場合に、好適な電極形成条件は、以下の通りである:
温度:570〜650℃、より好ましくは600〜630℃形成すべき電極がアモルファスシリコンからなる場合には、デバイス特性、生産性の点からは、前記電極形成ガスがSiH4であることが好ましい。
圧力:20.0〜66.7Pa(150〜500mTorr)、
温度:520〜570℃、
ガス組成:GeH4/SiH4=10/90〜60/40%の混合ガス、
圧力:20〜60Pa、温度:460〜560℃、
本発明においては、複数のスリットを有する平面アンテナ部材を介してマイクロ波を照射することにより電子温度が低く且つ高密度なプラズマを形成し、このプラズマを用いて前記被処理基体表面に酸化(必要に応じて、窒化処理)を行うことが特徴である。このため、プラズマダメージが小さく、且つ低温で反応性の高いプロセスが可能である。
本発明において好適に使用可能なプラズマの特性は、以下の通りである。
電子温度:<2eV
密度:1011〜1013
プラズマ密度の均一性:±3%以内
本発明によれば、下記のように好適な特性を有する酸化膜を容易に製造することができる。
物理膜厚:0.8mm〜任意
リーク特性:Dry Oxと比較して、同等〜1桁低減
膜均一性:±6%以内
本発明によれば、下記のように好適な特性を有する酸窒化膜を容易に製造することが出来る。表面窒素濃度 〜20% (図10を参照)図10にSPA窒化を施した酸化膜のSIMS分析結果を示す。15Aの下地酸化膜状に窒化処理を8秒、25秒施した。図に示されるように表面に高濃度の窒素が含有されており、界面の窒素混入によるデバイス特性の劣化を避けて窒化を行うことが可能となっている。
本発明の方法が適用可能な範囲は特に制限されないが、本発明により形成可能な極めて薄く、しかも良質な酸化膜および/又は酸窒化膜は、半導体装置の絶縁膜(特にMOS半導体構造のゲート絶縁膜)として特に好適に利用することができる。
リーク特性 Dry Oxと比較して半桁〜1桁低減
膜厚均一性 ±2%以内
以下、本発明の製造方法の好適な一態様について説明する。まず本発明の電子デバイス材料の製造方法によって製造可能な半導体装置の構造の一例について、絶縁膜としてゲート絶縁膜を備えたMOS構造を有する半導体装置を図1を参照しつつ説明する。
次に、このようなシリコン酸化膜2、窒化処理表面2a、更にその上にゲート電極13が配設された電子デバイス材料の製造方法について説明する。
図3はゲート絶緑膜2の成膜に使用可能なプラズマ処理ユニット32(33)の垂直方向の模式断面図である。
図4は本発明の電子デバイス材料の製造装置に使用可能なSPA60の一例を示す模式平面図である。
図5は本発明の電子デバイス材料の製造装置に使用可能な加熱反応炉47の一例を示す垂直方向の模式断面図である。
次に、上述した装置を用いて、ウエハW上にゲート絶縁膜2からなる絶縁膜を形成する方法の好適な一例について説明する。
次いで、このプラズマ処理ユニット33内でウエハW上に表面窒化処理が施され、先に形成された下地酸化膜(下地SiO2)2の表面上に窒化含有層2a(図7(b))が形成される。
次に、ウエハW上のSiO2膜上または下地SiO2膜を窒化処理したSiON膜上にゲート電極13(図1(a))を形成する。このゲート電極13を形成するためには、ゲート酸化膜またはゲート酸窒化膜が形成されたウエハWをそれぞれプラズマ処理ユニット32または33内から取り出し、搬送室31(図2)側に一旦取り出し、しかる後に加熱反応炉47内に収容する(ステップ4)。加熱反応炉47内では所定の処理条件下でウエハWを加熱し、ゲート酸化膜またはゲート酸窒化膜上に所定のゲート電極13を形成する。
上述した第1の工程では、ゲート酸化膜またはゲート酸窒化膜用下地酸化膜を形成するに際し、処理ガスの存在下で、Siを主成分とするウエハWに、複数のスリットを有する平面アンテナ部材(SPA)を介してマイクロ波を照射することにより酸素(O2)および希ガスとを含むプラズマを形成し、このプラズマを用いて前記被処理基体表面に酸化膜を形成しているため、品質が高く、且つ膜質制御を首尾よく行うことができる。
上述したように、本発明の電子デバイス材料の製造方法により、熱酸化膜より高品質の、低い界面準位を備えた酸化膜(例えばゲート酸化膜)を得ることができた。このように、上述の方法により形成された酸化膜の品質が高くなる理由は、本発明者の知見によれば、以下のように推定される。
また、上記第2の工程で表面窒化処理して得られる酸窒化膜は優れた品質を備えている。その理由は、本発明者の知見によれば、以下のように推定される。
更に、上記第3の工程において特定条件下で加熱処理して得られるゲート電極を形成することにより、MOS型半導体構造は優れた特性を備えている。その理由は、本発明者の知見によれば、以下のように推定される。
60 SPA(平面アンテナ部材)
2 酸化膜
2a 窒素含有層
32 プラズマ処理ユニット(プロセスチャンバ)
33 プラズマ処理ユニット(プロセスチャンバ)
47 加熱反応炉
Claims (23)
- 処理容器内の基板表面にプラズマを晒して、該基板表面に絶縁膜を形成する方法であって;
前記処理容器内に前記基板を搬入する工程と、
前記処理容器内に、少なくともO2ガスと希ガスを含む処理ガスを導入する工程と、
前記処理容器内にアンテナを介して、少なくともO2ガスと希ガスを含む前記処理ガスのプラズマを生成する工程と、
少なくともO2ガスと希ガスを含む前記処理ガスの前記プラズマを、前記基板表面に晒すことにより、該基板表面に2.5nm以下の厚さの酸化膜を形成する工程を含むことを特徴とする方法。 - 処理容器内の基板表面にプラズマを晒し、該基板表面に絶縁膜を形成する方法であって;
前記処理容器内に、少なくともO2ガスと希ガスを含む処理ガスを導入し、前記処理容器内にアンテナを介して、少なくともO2ガスと希ガスを含む前記処理ガスのプラズマを生成し、前記基板表面に少なくともO2ガスと希ガスを含む前記処理ガスの前記プラズマを晒すことにより、該基板表面に2.5nm以下の厚さの酸化膜を形成する工程と、
前記処理容器内に、少なくともN2ガスと希ガスを含む処理ガスを導入し、前記処理容器内にアンテナを介して、少なくともN2ガスと希ガスを含む前記処理ガスのプラズマを生成し、前記酸化膜表面に少なくともN2ガスと希ガスを含む前記処理ガスの前記プラズマを晒すことにより、前記酸化膜表面を窒化して、前記基板表面に酸窒化膜を形成する工程を含むことを特徴とする方法。 - 処理容器内の基板表面にプラズマを晒し、該基板表面に絶縁膜を形成する方法であって;
前記処理容器内に2.5nm以下の厚さを有する酸化膜を形成する前記基板を搬入する工程と、
前記処理容器内に、少なくともN2ガスと希ガスを含む処理ガスを導入する工程と、
前記処理容器内にアンテナを介して、少なくともN2ガスと希ガスを含む前記処理ガスのプラズマを生成する工程と、
前記酸化膜表面に少なくともN2ガスと希ガスを含む前記処理ガスの前記プラズマを晒す工程と、
少なくともN2ガスと希ガスを含む前記処理ガスの前記プラズマにより、前記酸化膜表面を窒化して、前記基板表面に酸窒化膜を形成する工程を含むことを特徴とする方法。 - 前記プラズマの電子温度は、2eV以下である請求項1〜3のいずれかに記載の方法。
- 前記アンテナは、複数のスリットを有する平面アンテナである請求項1〜4のいずれかに記載の方法。
- 前記プラズマは、マイクロ波を前記アンテナを介して前記処理容器内に導入して生成される請求項1〜5のいずれかに記載の方法。
- 前記酸化膜が、ゲート酸化膜(SiO2膜)またはゲート酸窒化膜用下地酸化膜(下地SiO2膜)である請求項1〜6のいずれかに記載の方法。
- 前記希ガスが、クリプトン、アルゴンまたはヘリウムから選ばれた1種以上のガスである請求項1〜7のいずれかに記載の方法。
- 前記処理ガスが、流量5〜500sccmのO2、および流量500〜3000sccmのクリプトン、アルゴンまたはヘリウムを含むガスである請求項1〜8のいずれかに記載の方法。
- 前記SiO2膜の形成が、室温〜700℃の温度下で行なわれる請求項1〜9のいずれかに記載の方法。
- 前記SiO2膜の形成が、20〜5000mTorrの圧力下で行なわれる請求項1〜10のいずれかに記載の方法。
- 前記プラズマが、0.5〜5W/cm2の出力で形成される請求項1〜11のいずれかに記載の方法。
- 前記処理ガスが、更にH2を含む請求項1〜12のいずれかに記載の方法。
- O2および希ガスを少なくとも含む処理ガスの存在下で、アンテナを介して該処理ガスの第1のプラズマを生成する工程と、
前記第1のプラズマを被処理体の表面に晒し、該被処理体表面に、2.5nm以下の厚さの酸化膜(SiO2膜)を形成する工程と、
N2と希ガスとを少なくとも含む処理ガスの存在下で、アンテナを介して該処理ガスの第2のプラズマを生成する工程と、
前記第2のプラズマを前記酸化膜の表面に晒し、該酸化膜表面を窒化して、酸窒化膜(SiON膜)を形成する工程と、
前記酸窒化膜上に、電極を形成する工程とを含むことを特徴とする半導体デバイスの製造方法。 - 前記電極層が、ポリシリコンまたはアモルファスシリコンまたはSiGeからなる電極層である請求項14に記載の方法。
- 前記電極層がゲート電極である請求項14または15に記載の方法。
- 前記アンテナは、複数のスリットを有する平面アンテナである請求項14〜16のいずれかに記載の方法。
- 前記プラズマは、マイクロ波により生成される請求項14〜17のいずれかに記載の方法。
- 基板表面にプラズマを晒し、該基板表面に絶縁膜を形成するシステムであって;
前記基板を搬送する搬送手段を有する搬送室と、
前記搬送室内に配置され、前記基板をプラズマ処理する、少なくとも1つのプラズマ処理ユニットと、
前記搬送室内に配置され、前記基板を加熱する加熱ユニットと、
前記搬送室内に配置され、該搬送室内に前記基板を搬入するロードロックユニットと、
前記基板を配置するカセット部と、
前記カセット部より前記ロードロックユニットへ前記基板を出し入れするローダー部と備え、
前記プラズマ処理ユニットは、少なくともO2ガスと希ガスを含む処理ガスを導入し、前記プラズマ処理ユニット内に、アンテナを介して、前記少なくともO2ガスと希ガスを含む処理ガスのプラズマを生成し、前記基板表面に前記少なくともO2ガスと希ガスを含む処理ガスのプラズマを形成し、前記基板表面に前記少なくともO2ガスと希ガスを含む処理ガスのプラズマを晒すことにより、前記基板表面に2.5nm以下の厚さの酸化膜を形成する第1のプラズマ処理ユニットと、
少なくともN2ガスと希ガスを含む処理ガスを導入し、前記プラズマ処理ユニット内に、アンテナを介して、前記少なくともN2ガスと希ガスを含む処理ガスのプラズマを生成し、前記酸化膜表面に前記少なくともN2ガスと希ガスを含む処理ガスのプラズマを形成し、前記酸化膜表面に前記少なくともN2ガスと希ガスを含む処理ガスのプラズマを晒すことにより、前記酸化膜表面を窒化して、前記基板表面に酸窒化膜を形成する第2のプラズマ処理ユニットとを有することを特徴とするシステム。 - 基板表面にプラズマを晒して、絶縁膜を形成するシステムであって;
2.5nm以下の厚さの酸化膜を有する前記基板を搬送する搬送手段を有する搬送室と、
前記搬送室内に配置され、前記酸化膜を有する基板をプラズマにより窒化処理する、少なくとも1つのプラズマ処理ユニットと、
前記搬送室内に配置され、前記酸化膜を有する基板を加熱する加熱ユニットと、
前記搬送室内に配置され、該搬送室内に前記基板を搬入するロードロックユニットと、
前記基板を配置するカセット部と、
前記カセット部より前記ロードロックユニットへ前記基板を出し入れするローダー部と備え、
前記プラズマ処理ユニットは、該プラズマ処理ユニットに少なくともN2ガスと希ガスを含む処理ガスを導入し、前記プラズマ処理ユニット内に、アンテナを介して、前記少なくともN2ガスと希ガスを含む処理ガスのプラズマを生成し、前記酸化膜表面に前記少なくともN2ガスと希ガスを含む処理ガスのプラズマを晒すことにより、前記酸化膜表面を窒化して、前記基板表面に酸窒化膜を形成するプラズマ処理ユニットとを有することを特徴とするシステム。 - 前記アンテナは、複数のスリットを有する平面アンテナである請求項19または20に記載のシステム。
- 前記プラズマは、マイクロ波を前記アンテナを介して前記処理容器内に導入して生成される請求項19〜21のいずれかに記載のシステム。
- 前記プラズマの電子温度は、2eV以下である請求項19〜22のいずれかに記載のシステム。
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JPWO2002058130A1 (ja) | 2004-05-27 |
KR20070116696A (ko) | 2007-12-10 |
US20040142577A1 (en) | 2004-07-22 |
JP4401375B2 (ja) | 2010-01-20 |
CN1860596A (zh) | 2006-11-08 |
JP3916565B2 (ja) | 2007-05-16 |
CN101399198A (zh) | 2009-04-01 |
KR20090053965A (ko) | 2009-05-28 |
CN100477113C (zh) | 2009-04-08 |
KR100837707B1 (ko) | 2008-06-13 |
EP1361605A4 (en) | 2006-02-15 |
JP2010050462A (ja) | 2010-03-04 |
WO2002058130A1 (fr) | 2002-07-25 |
JP4926219B2 (ja) | 2012-05-09 |
KR20060061404A (ko) | 2006-06-07 |
KR100994387B1 (ko) | 2010-11-16 |
US20050233599A1 (en) | 2005-10-20 |
US20070224837A1 (en) | 2007-09-27 |
KR100746120B1 (ko) | 2007-08-13 |
KR20030070126A (ko) | 2003-08-27 |
EP1361605A1 (en) | 2003-11-12 |
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