TW202120519A - 三碘矽烷胺前驅物化合物 - Google Patents
三碘矽烷胺前驅物化合物 Download PDFInfo
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- TW202120519A TW202120519A TW109134178A TW109134178A TW202120519A TW 202120519 A TW202120519 A TW 202120519A TW 109134178 A TW109134178 A TW 109134178A TW 109134178 A TW109134178 A TW 109134178A TW 202120519 A TW202120519 A TW 202120519A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
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- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/025—Silicon compounds without C-silicon linkages
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/12—Organo silicon halides
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/12—Organo silicon halides
- C07F7/121—Preparation or treatment not provided for in C07F7/14, C07F7/16 or C07F7/20
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- H—ELECTRICITY
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- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02164—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon oxide, e.g. SiO2
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- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/0217—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
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Abstract
本文提供某些胺基三碘矽烷,其可用作矽前驅物化合物用於氣相沈積矽物種於微電子裝置之表面上。就此而言,該等前驅物可連同可選共反應物一起利用以沈積含矽膜,例如氮化矽、氧化矽、氧氮化矽、SiOCN、SiCN及碳化矽。本發明之該等矽前驅物不含Si-H鍵。亦提供藉由用二級胺自四鹵基矽烷化合物置換鹵素製備該等矽前驅物化合物之方法。
Description
本發明係關於化學領域。特定而言,其係關於製備某些三碘矽烷胺化合物之方法及其作為矽前驅物化合物在製造微電子裝置中之用途。
基於矽之薄膜之低溫沈積對於當前半導體裝置製造及製程至關重要。在過去幾十年中,SiO2
薄膜已用作積體電路(IC)(包括微處理器、基於邏輯及記憶之裝置)之基本結構組件。SiO2
已成為半導體工業中之主要材料並且已用作幾乎所有已商業化之基於矽之裝置的絕緣介電材料。SiO2
多年來一直用作互連電介質、電容器及閘極介電材料。
沈積高純度SiO2
膜之習用工業方法已利用正矽酸四乙酯(TEOS)作為薄膜前驅物用於該等膜之氣相沈積。TEOS係穩定之液體材料,其已用作化學氣相沈積(CVD)、電漿增強之化學氣相沈積(PECVD)及原子層沈積(ALD)中之矽源試劑,以達成SiO2
之高純度薄膜。其他薄膜沈積方法(例如聚焦離子束、電子束及用於形成薄膜之其他能量方式)亦可利用此矽源試劑實施。
隨著積體電路裝置尺寸不斷減小,隨著光微影縮放方法之相應發展及裝置幾何尺寸之縮小,相應地尋求新沈積材料及方法以形成高完整性SiO2
薄膜。期望經改良之基於矽之前驅物(及共反應物)以形成SiO2
膜以及可在低溫下、例如低於400℃及低於200℃之溫度下沈積之其他含矽薄膜,例如Si3
N4
、SiC及經摻雜SiOx
高k薄膜。為達成該等低沈積溫度,化學前驅物需要乾淨地分解以獲得期望膜。
低溫膜之達成亦需要使用及開發確保形成均勻保形含矽膜之沈積方法。因此,正在改善及實施化學氣相沈積(CVD)及原子層沈積(ALD)方法,同時持續尋找在處置、蒸發及輸送至反應器方面穩定但在低溫下展現乾淨地分解之能力以形成期望薄膜之反應性前驅物化合物。此努力中之基本挑戰係達成前驅物熱穩定性與前驅物對高純度、低溫膜生長方法之適合性之平衡,同時保持由此製得之膜的期望電子及機械性質。
一般而言,本發明提供某些胺基三碘矽烷,其可用作矽前驅物化合物用於氣相沈積矽物種於微電子裝置之表面上。就此而言,該等前驅物可連同可選共反應物一起使用以沈積含矽膜,例如氮化矽、氧化矽、氧氮化矽、SiOCN、SiCN及碳化矽。本發明之矽前驅物不含Si-H鍵。亦提供藉由用二級胺自四鹵基矽烷化合物置換鹵素製備該等矽前驅物化合物之方法。
在第一態樣中,本發明提供製備式(R2
N)SiI3
之化合物之方法,其中每一R相同或不同且係C1
-C6
烷基,或每一R與其所鍵結之氮原子一起形成3至6員N-雜環,該方法包含使莫耳過量之式R2
N之化合物與四鹵基矽烷接觸。在某些實施例中,四鹵基矽烷係四碘矽烷。在本發明此態樣之實踐中,將式R2
NH之胺添加至四鹵基矽烷;此外,該胺係以莫耳過量使用,其亦用作酸清除劑(即,用於HI)。在一個實施例中,利用約1:2至約1:4或約1:2之四鹵基矽烷對胺之比率。式R2
N之胺可純淨的或於惰性溶劑(例如烴溶劑)中添加至四鹵基矽烷化合物;同樣地,四鹵基矽烷化合物可純淨的或於惰性溶劑(例如,甲苯或烴,例如二甲苯)中使用。其他實例性溶劑包括二氯甲烷、氯仿、二氯乙烷、四氯化碳、戊烷、己烷、環己烷、庚烷、苯及諸如此類。
在某些實施例中,操作溫度範圍可為約-80℃至約100℃、或約-10℃至約25℃、或約5℃至約10℃。
在某些實施例中,R係選自甲基、異丙基及第三丁基。
如本文所用,術語「芳基」包括苯基及萘基且該等基團經一至三個選自以下之基團取代:C1
-C6
烷基、C1
-C6
烷氧基、-CN、-NO2
、C1
-C6
烷氧基羰基、C1
-C6
烷醯基氧基、C1
-C6
烷基磺醯基、羥基、羧基及鹵素。
術語「雜芳基」包括含有一個氧原子、及/或一個硫原子及最多三個氮原子之5或6-員雜環芳基環,該雜環芳基環視情況稠合至一個或兩個苯基環。該等系統之實例包括噻吩基、呋喃基、吡咯基、咪唑基、吡唑基、噻唑基、異噻唑基、噁唑基、異噁唑基、三唑基、噻二唑基、噁二唑基、四唑基、噻三唑基、噁三唑基、吡啶基、嘧啶基、吡嗪基、嗒嗪基、噻嗪基、噁嗪基、三嗪基、噻二嗪基、噁二嗪基、二噻嗪基、二噁嗪基、噁噻嗪基、四嗪基、噻三嗪基、噁三嗪基、二噻二嗪基、咪唑啉基、二氫嘧啶基、四氫嘧啶基、四唑并-[1,5-b]嗒嗪基及嘌呤基、苯并噁唑基、苯并噻唑基、苯并咪唑基、吲哚基及諸如此類;該等基團視情況經一至三個選自以下之基團取代:C1
-C6
-烷基、C1
-C6
烷氧基、--CN、--NO2
、C1
-C6
烷氧基羰基、C1
-C6
-烷醯基氧基、C1
-C6
烷基磺醯基及鹵素基團。
在第二態樣中,本發明提供式(R2
N)SiI3
之化合物,其中每一R獨立地為C1
-C6
烷基。在某些實施例中,R選自甲基、乙基、丙基、正丁基、異丙基、第三丁基及第二丁基。在某些實施例中,式(R2
N)SiI3
之化合物選自二異丙基胺基三碘矽烷、二乙基胺基三碘矽烷及二甲基胺基三碘矽烷。
在該等第二及第三態樣中,所列舉之化合物可用作前驅物化合物用於將矽沈積於微電子裝置之表面上。
在反應適當完成後,粗產物可藉助相容過濾介質過濾,該相容過濾介質可係由包括玻璃、熱活化矽藻土、聚丙烯、聚乙烯、聚四氟乙烯(PTFE)、全氟烷氧基烷烴(PFA)、鈍化不銹鋼及其鎳合金之材料製成。溶劑自濾液之分離可藉由球對球(bulb-to-bulb)蒸餾在0.01至760托(Torr)範圍內之壓力及20℃至110℃範圍內之溫度下完成。額外純化步驟可包括短程真空蒸餾以將期望產物與二或三取代副產物之混合物、殘餘溶劑及反應過程中所形成之任何鹵基矽烷錯合物分離,其中來自短程蒸餾之產物純度在95% - 99%之範圍內。額外純化步驟包括在大氣壓或真空條件下使用分餾以達成超過99%之純度。在某些實施例中,純化亦可包括結晶或溶劑洗滌以達成超過99%之電子級純度。
如上所述,式(R2
N)SiI3
之化合物可用作前驅物化合物用於低溫氣相沈積矽於微電子裝置之至少一個表面上。因此,在第三態樣中,本發明提供沈積含矽膜於微電子裝置基板上之方法,該方法包含在約150℃至約400℃之溫度及約0.5至約15托之壓力下在原子層沈積條件下使該基板與依序脈衝輸送之式(R2
N)SiI3
化合物及視情況任何期望共反應物接觸。
為便於參考,「微電子裝置」包括半導體基板、平板顯示器、相變記憶體裝置、太陽電池板及包括太陽能基板之其他產品、光伏打裝置及微機電系統(MEMS),其經製造用於微電子、積體電路或電腦晶片應用。太陽能基板包括(但不限於)矽、非晶形矽、多晶體矽、單晶矽、CdTe、銅銦硒化物(copper indium selenidev)、銅銦硫化物及鎵上砷化鎵(gallium arsenide on gallium)。太陽能基板可經摻雜或未經摻雜。應理解,術語「微電子裝置」並不意欲以任何方式進行限制且包括最終將變成微電子裝置或微電子總成之任何基板。
一般而言,氣相沈積條件包含稱為化學氣相沈積、脈衝-化學氣相沈積及原子層沈積之反應條件。在脈衝-化學氣相沈積之情形中,在有或沒有中間(惰性氣體)吹掃步驟之情形下,可利用前驅物化合物與任何期望共反應物之一系列交替脈衝以使膜厚度積累至期望終點。
在某些實施例中,前驅物化合物(R2
N)SiI3
之脈衝時間(即,暴露於基板之持續時間)在約1秒與10秒間之範圍內。當利用吹掃步驟時,持續時間為約1秒至4秒或1至2秒。在其他實施例中,共反應物之脈衝時間在1秒至60秒之範圍內。在其他實施例中,共反應物之脈衝時間在約5秒至約10秒之範圍內。
在本發明之方法中,式(R2
N)SiI3
化合物與期望共反應物以任何適宜方式、例如在單晶圓CVD室中或在含有多個晶圓之爐中反應。若期望之含矽膜係氮化矽,則共反應物可選自N2
、H2
、NH3
、肼(例如N2
H4
、CH3
HNNH2
、CH3
HNNHCH3
)、有機胺(例如NCH3
H2
、NCH3
CH2
H2
、N(CH3
)2
H、N(CH3
CH2
)2
H、N(CH3
)3
、N(CH3
CH2
)3
、Si(CH3
)2
NH)、吡唑啉、吡啶、二胺(例如乙二胺)、其自由基物種及其混合物。若期望之含矽膜係氧化矽,則共反應物將選自諸如以下之化合物:O2
、O3
、H2
O、H2
O2
、NO、N2
O、NO2
、羧酸、醇、二醇及其自由基及其組合,反應物係經電漿處理之氧。
在原子層沈積(ALD)方法之情形中,式(R2
N)SiI3
化合物可用作一種「矽」前驅物,且在期望矽-氮化物膜之情形中,可利用含氮材料作為共反應物或作為另一前驅物。含氮材料可為有機(例如,第三丁基肼)或無機的(例如,NH3
)。在一些實施例中,可利用含氮材料之混合物作為用於ALD之前驅物,且在其他實施例中,可利用僅一種含氮材料作為用於ALD之前驅物(例如,僅NH3
,或僅第三丁基肼)。如本文所用,術語「含氮材料」可用來指純淨之前驅物材料(例如,其完全為NH3
或完全為第三丁基肼),或可指含有「含氮材料」作為含氮材料之混合物之一部分的前驅物。在某些實施例中,ALD可用於形成包含矽及氮之材料。該材料可包含氮化矽,基本上由氮化矽組成或由氮化矽組成,及/或可具有其他組合物。
在原子層沈積中,依序處理步驟通常稱為「脈衝」或循環。因此,ALD方法係基於前驅物化學品之受控、自我限制表面反應。藉由使基板與前驅物交替且依序地接觸來避免氣相反應。氣相反應物在時間上且在基板表面上彼此分開,例如,藉由在反應物脈衝之間自反應室中去除過量反應物及/或反應物副產物。在一些實施例中,一或多個基板表面交替且依序地與兩種或以上氣相前驅物或反應物接觸。使基板表面與氣相反應物接觸係指反應物蒸氣與基板表面接觸有限的一段時間。換言之,可理解為基板表面在有限的一段時間內暴露於各氣相反應物。
簡言之,通常在約0.5至50托之壓力下將包含至少一個表面之基板加熱至在150℃至700℃範圍內之適宜沈積溫度。在其他實施例中,溫度為約200℃至300℃或500℃至650℃。沈積溫度通常維持低於反應物之熱分解溫度,但保持在足夠高之溫度下,以避免反應物凝結並為期望「選擇性」表面反應提供活化能。實例性表面包括氮化物(例如,氮化矽、氮化鈦及氮化鋁)、氧化物(例如二氧化矽、二氧化鉿及氧化鋯)。
使基板表面與氣相第一反應物接觸。在某些實施例中,將氣相第一反應物之脈衝提供至含有基板之反應空間。在其他實施例中,使基板移動至含有氣相第一反應物之反應空間。條件通常經選擇,使得不超過約一個單層之第一反應物以自我限制之方式吸附於基板表面上。適當接觸時間可由熟習此項技術者基於特定條件、基板及反應器構形容易地確定。過量之第一反應物及反應副產物(若有)係例如藉由用惰性氣體吹掃或藉由將基板自第一反應物之存在處去除而自基板表面去除。
吹掃意指例如藉由利用真空幫浦將腔抽真空及/或藉由用惰性氣體(例如氬氣或氮氣)置換反應器內之氣體自基板表面去除氣相前驅物及/或氣相副產物。在某些實施例中,吹掃時間為約0.05秒至20秒、介於約1秒與10秒之間或介於約1秒與2秒之間。然而,若需要,可利用其他吹掃時間,例如需要在極高縱橫比結構或其他具有複雜表面形貌之結構上進行高度保形階梯覆蓋之情形中。
使基板表面與氣相第二氣態反應物接觸。在某些實施例中,將第二氣態反應物之脈衝提供至含有基板之反應空間。在其他實施例中,使基板移動至含有氣相第二反應物之反應空間。將過量之第二反應物及表面反應之氣態副產物(若有)自基板表面去除。重複接觸及去除之步驟,直至在基板之第一表面上選擇性地形成期望厚度之薄膜,其中每一循環留下不超過約一個分子單層。可包括包含交替且依序地使基板之表面與其他反應物接觸之額外時期,以形成更複雜的材料,例如三元材料。
每一循環之每一相通常係自我限制的。在每一相中提供過量反應物前驅物以使敏感結構表面飽和。表面飽和確保反應物佔據所有可用反應性位點(例如,受物理大小或「立體阻礙」約束)並由此確保優良階梯覆蓋。通常,在每一循環中沈積少於一個分子層之材料,然而,在一些實施例中,在該循環期間沈積多於一個分子層。
去除過量反應物可包括排出反應空間之一些內容物及/或用氦氣、氮氣或另一惰性氣體吹掃反應空間。在某些實施例中,吹掃可包含在繼續使惰性載氣流至反應空間的同時關閉反應性氣體流。在另一實施例中,吹掃步驟可採用真空步驟以自表面去除過量反應物。
能夠用於生長薄膜之反應器可用於本文所述之沈積。該等反應器包括ALD反應器、以及配備有適當設備及以「脈衝」方式提供前驅物之構件的CVD反應器。根據某些實施例,可使用噴灑頭式反應器。
可使用之適宜反應器的實例包括市售設備及自製反應器,且對於熟習CVD及/或ALD技術者而言係已知的。
因此,根據第四態樣,本發明提供沈積含矽膜於微電子裝置基板上之方法,其包含在原子層沈積條件下在約150℃至約700℃之溫度及約0.5至約50托之壓力下使該基板與依序脈衝輸送之以下各項接觸:式(I)化合物
(R2
N)SiI3
, (I)
其中每一R相同或不同且係C1
-C6
烷基,或每一R與其所鍵結之氮原子一起形成3至6員N-雜環;
及視情況任何期望共反應物。
本發明可藉由其某些實施例之以下實例進一步說明,但應理解,除非另外特定指出,否則包括該等實例僅用於說明之目的且並非意欲限制本發明範圍。
實例 實例 1 ( 二異丙基胺基 ) 三碘矽烷
向配備有機械攪拌器、熱電偶及橡膠隔片之250 mL三頸圓底燒瓶加載SiI4
(10 g, 18.6 mmol)於甲苯(50 mL)中之溶液。使用冰浴將溶液冷卻至約0℃。在0-2℃下使用套管將二異丙胺(5.5g, 74.4 mmol)於甲苯(50 mL)中之溶液逐滴添加至該冰冷溶液。未觀察到立即反應且在攪拌30 min之後有少量鹽沈澱出。將混合物在室溫下攪拌過夜。此時更多鹽沈澱出,此指示反應緩慢進展。藉由NMR分析混合物。僅觀察到10%轉化率,亦觀察到大量未反應之胺。產物係藉由GC MS分析證實。亦觀察到未反應之SiI4
。未嘗試進一步純化。
實例 2 ( 二異丙基胺基 ) 三碘矽烷
向配備有機械攪拌器、熱電偶及橡膠隔片之250 mL三頸圓底燒瓶加載SiI4
(5 g, 9.33 mmol)於甲苯(50 mL)中之溶液。使用冰浴將溶液冷卻至約0℃。在0-2℃下使用套管將二異丙胺(1.88g, 18.6 mmol)於甲苯(50 mL)中之溶液逐滴添加至該冰冷溶液。未觀察到立即反應且在攪拌30 min之後有少量鹽沈澱出。將混合物在室溫下攪拌過夜。此時更多鹽沈澱出,此指示反應緩慢進展。藉由NMR分析混合物。未觀察到游離胺。將反應混合物過濾並作為於甲苯中之溶液儲存。NMR分析證實形成期望產物。
實例 3 ( 二異丙基胺基 ) 三碘矽烷
(異丙基)2
NSiI3
與50 g SiI4
於甲苯(500 mL)中之第一批料。於約0℃下將二異丙胺(19 g)於甲苯(50 mL)逐滴添加至粉紅色SiI4
溶液中。溶液之顏色變為稻草般黃色並逐漸變為無色。反應混合物變渾濁,但未觀察到顯著放熱。使反應混合物在室溫下在氮氣下攪拌。藉由1H NMR監測反應。過夜攪拌(約20 h)後,約22%游離胺仍未反應且在RT下在3天內消耗95%之DIPA。將反應混合物過濾,在減壓下去除揮發性物質,獲得黏性油狀物。靜置過夜後,黏性油狀物固化。將固體用冰冷己烷洗滌並在真空下乾燥,獲得米色固體。產量34g (72%)。藉由1
H NMR之純度 >98%
實例 4 ( 二乙基胺基 ) 三碘矽烷
向配備有機械攪拌器、熱電偶及橡膠隔片之250 mL三頸圓底燒瓶加載SiI4
(10 g, 18.6 mmol)於甲苯(50 mL)中之溶液。使用冰浴將溶液冷卻至約0℃。在0-2℃下使用液體加料漏斗將二乙胺(5.5g, 74.4 mmol)於甲苯(50 mL)中之溶液逐滴添加至該冰冷溶液。立即發生反應,產生厚厚的白色沈澱。反應放熱顯著且藉由調整胺溶液之添加速率將反應混合物之溫度維持在10℃。將混合物再攪拌30分鐘,隨後藉助燒結漏斗過濾。在減壓下去除揮發性物質。所得黏性油狀物經受NMR及GC分析。GC分析顯示形成二乙基胺基三碘矽烷。(參見圖2)。
實例 5 -- (i-Pr2
N)SiI3 之合成
三碘矽基二異丙胺(iPr2
N)SiI3
與41 g SiI4
於甲苯(400 mL)中之第二批料。將純淨的二異丙胺(15.4 g)一次性地添加至粉紅色SiI4溶液中。顏色立即變為黃色並緩慢地變為無色。反應混合物變渾濁,但未觀察到顯著放熱。使反應混合物在室溫下在氮氣下攪拌。反應藉由1H NMR監測且在RT下在3天內消耗95%之游離DIPA。產量28g (72%)。藉由1HNMR之純度 >98%
實例 6 (N(CH3
)2
)2
SiI2 及 (N(CH3
)2
)SiI3 之合成
將SiI4
(100 g)溶於甲苯(1000 mL)中。向所得粉紅色溶液中緩慢添加二甲基醯胺鋰(20 g)。反應混合物變成微黃色且然後變為無色。將混合物之溫度升至約40℃。此時,將反應混合物在RT下攪拌過夜。
將反應混合物藉助燒結漏斗過濾,隨後在約50℃在減壓下去除揮發性物質。藉由短程蒸餾純化淺黃色黏性油狀物,得到澄清無色油狀物。剩餘的黃色油殘餘物用己烷稀釋並保存在冰箱中。所分離物:澄清油狀物,藉由1
H及29
Si NMR,約75-80%純。
已特定參考本發明之較佳實施例詳細闡述本發明,但應理解,可在本發明之精神及範圍內實現各種變化及修改。
圖1係二異丙基胺基三碘矽烷之熱重分析及差示掃描量熱譜圖。
圖2繪示實例4之粗產物的GC-MS分析,其顯示形成期望產物 - 二乙基胺基三碘矽烷。
圖3係實例5之反應混合物的1
H NMR分析,其顯示二異丙基胺基三碘矽烷之形成及二異丙胺之完全轉化。
Claims (10)
- 一種式(I)化合物, (R2 N)SiI3 , (I) 其中每一R相同或不同且係C1 -C6 烷基,或每一R與其所鍵結之氮原子一起形成3至6員N-雜環。
- 如請求項1之化合物,其中每一R獨立選自甲基、乙基、丙基、正丁基、異丙基、第三丁基及第二丁基。
- 如請求項1之化合物,其中每一R係甲基。
- 如請求項1之化合物,其中每一R係異丙基。
- 如請求項1之化合物,其中每一R係乙基。
- 如請求項1之化合物,其中每一R與其所鍵結之原子一起形成三至六員N-雜環。
- 一種製備式(I)化合物之方法, (R2 N)SiI3 , (I) 其中每一R相同或不同且係C1 -C6 烷基,或每一R與其所鍵結之氮原子一起形成3至6員N-雜環,該方法包含使莫耳過量之式R2 N之化合物與四鹵基矽烷接觸。
- 如請求項8之方法,其中該四鹵基矽烷對該式R2 N之化合物之莫耳比為約1:2。
- 一種用於沈積含矽膜於微電子裝置基板上之方法,其包含在原子層沈積條件下在約150℃至約700℃之溫度及約0.5至約50托(Torr)之壓力下使該基板與依序脈衝輸送之以下各項接觸:式(I)化合物 (R2 N)SiI3 , (I) 其中每一R相同或不同且係C1 -C6 烷基,或每一R與其所鍵結之氮原子一起形成3至6員N-雜環; 及視情況任何期望共反應物。
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