TW214610B - Method of making contact for semiconductor device - Google Patents
Method of making contact for semiconductor device Download PDFInfo
- Publication number
- TW214610B TW214610B TW082102998A TW82102998A TW214610B TW 214610 B TW214610 B TW 214610B TW 082102998 A TW082102998 A TW 082102998A TW 82102998 A TW82102998 A TW 82102998A TW 214610 B TW214610 B TW 214610B
- Authority
- TW
- Taiwan
- Prior art keywords
- layer
- silicon
- polysilicon
- doped
- doped polysilicon
- Prior art date
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 94
- 229920005591 polysilicon Polymers 0.000 claims abstract description 94
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 78
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 38
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 34
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000000151 deposition Methods 0.000 claims abstract description 4
- 239000003989 dielectric material Substances 0.000 claims abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 22
- 229910052710 silicon Inorganic materials 0.000 claims description 22
- 239000010703 silicon Substances 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 230000002079 cooperative effect Effects 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 229910021419 crystalline silicon Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 4
- 229910052757 nitrogen Inorganic materials 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 claims 1
- 230000008025 crystallization Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- SBEQWOXEGHQIMW-UHFFFAOYSA-N silicon Chemical compound [Si].[Si] SBEQWOXEGHQIMW-UHFFFAOYSA-N 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 abstract description 8
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- -1 silane Chemical compound 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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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
- H01L21/04—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
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76885—By forming conductive members before deposition of protective insulating material, e.g. pillars, studs
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76829—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
- H01L21/76831—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers in via holes or trenches, e.g. non-conductive sidewall liners
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76829—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
- H01L21/76834—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers formation of thin insulating films on the sidewalls or on top of conductors
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76897—Formation of self-aligned vias or contact plugs, i.e. involving a lithographically uncritical step
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
- H01L23/53204—Conductive materials
- H01L23/53271—Conductive materials containing semiconductor material, e.g. polysilicon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electrodes Of Semiconductors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Formation Of Insulating Films (AREA)
- Conductive Materials (AREA)
- Die Bonding (AREA)
Description
經濟部中央標準局8工消費合作社印* 214610 Λί __Β6_ 五、發明説明(1 ) 搿明領城 本發明係關於一種製造一半導體裝置之等電接點之方 法,更特別地是關於製造一種用於例如積體電路之半導 體裝置的覆軍式(capped)和無界式(borderless)接點。 琎明背畺 半導體装置之接點為一半導體主體表面之導電區,用 Μ與該主體或該主體內導電區電性連接,覆罩式接點指 完全Μ涵緣物質包圍之接點。無界式接點指可重叠半導 體裝置之絕緣區或閘極區之接點。對於高密度之積體電 路而言(例如動態皤櫬存取記憶體(DRAM),欲形成此類 覆罩式和無界式接點乃相當地困雞,特別在一完全比例 (ful卜scale)的製程中尤其困難。然而,這些接點又是 高密度型式之積體電路(如DRAMS)所需者。特別地是, 由轉換電晶體至儲存電極的内節點接點更需要這種覆單 式和無界式接點。覆罩可允許其他導電層依(例如)DRAM 記憶體内之位元線的要求而通過接觸面積,一棰用Μ形 成覆罩式和無界式接點之技術是形成摻雜多晶矽 (polysilicon〉之接點。此摻雜的多晶矽接點區形成於 非摻雜(本質的)多晶矽内之開口內。該非摻雜多晶矽可 易於選擇地予Μ蝕刻與閘極包封或隔離物K達成重叠或 無邊界。但是,此非摻雜多晶矽必須被除去,並由一具 低介電係數之絕緣材質(例如二氧化矽)取代之,檷準地 用於移除此非摻雜多晶矽但又不損壊已摻雜多晶矽接點 ----------LI_------{-----^------.玎------Μ I (請先閱讀背面之注意事項再塡寫本頁) 本紙張尺度適用中國國家標準(CNS)甲4規格(:nu X 297父犛) 82.3. 40,000 2l46l〇 A 6 B6 經濟部中央標準局S工消費合作社印" 五、發明説明(2 ) 區之罩幕系統難於控制,或者其需要特殊選擇的蝕刻劑 。因此,需要一種易於實施且可使用於一製程中形成覆 罩式無界的已摻雜多晶矽接點之方法。 發明之簡論 本發明之一方面在於一種於非摻雜多晶矽内之開口中 形成已摻雜多晶矽之無界接點的方法,其中一 Μ二氧化 矽製成之自我對準的罩層被形成於該已摻雜多晶矽上, 此由熱成長二氧化矽於該摻雜與非摻雜多晶矽兩者上, 旦使該二氧化矽層在已摻雜多晶矽上之厚度大於在非摻 雜多晶矽上之厚度的方式達成。因此,非摻雜多晶矽上 之較薄二氧化矽層可輕易予Κ鈾刻掉,而保留位在於已 摻雜多晶矽上之一部分二氧化矽。 本發明之製造一半導體裝置之導電接點於一半導體材 質主體上之方法,包括在該主體表面上形成一層非摻雜 多晶矽。一開口被形成於此非摻雜多晶矽層上,且被充 填Μ已摻雜之多晶矽。二氧化矽層被生成於該非和已摻 雜多晶矽兩者之上,且其中在已摻雑多晶矽上之二氧化 矽層較生成於非摻雑多晶矽上之二氧化矽層為厚。因此 該非摻雜多晶矽上之較薄之二氧化矽層被蝕刻掉*僅留 下位於已摻雜多晶矽上之二氧化矽。接著除去該非摻雜 多晶矽。 另一方面本發明係鼷於一種製造一導電接點於一半導 體材質主體表面上之方法,該方法包含下列步驟:於該 -4- (請先閱讀背面之注意事項再填寫本頁) -裝- 訂· 本紙張尺度適用中國國家標準(CNS)甲4规格(2U) X 297公釐) 82.3. 40,000 2l46l〇 A 6 Βί) 經濟部中央標準局β工消费合作社印¾ 五、發明説明(3 ) 主體表面沉積一非摻雜多晶矽曆;形成一貫穿該非摻雜 多晶矽曆至該主體表面之開口; Μ —氮化矽層或其他絕 緣膜覆篕該開口之側壁;以摻雑多晶矽填充該開口的其 他部分;在一氣化$環境中加熱該已摻雜和非摻雜多晶砂 ,以形成一二氣化矽曆,該層在已摻雑多晶矽上之厚度 較非摻雜多晶矽上之厚度為厚;蝕刻該二氧化矽層以移 除非摻雜多晶矽上之部分,而留下已摻雑多晶矽上之一 部分二氧化矽層;移除該非摻雜多晶矽;以及形成一介 電層於該主體表面上,圍繞已摻雜多晶矽。 本發明將可由下列詳细說明配合圖式而得較佳的了解。 鬭式之簡述 匾1-6為一半導體裝置之截面圖,例示本發明所形成 具有無界接點之裝置的方法之不同步驟。 應明白瑄些圖式並不須是等比例顯示。 現參考圖1 ,係顯示一全氧半導體(M0S)場效電晶體 (FET)10之部分截面圖,其表現出本發明在形成一無界 式接點之方法中開始的狀態圖,該電晶體10包含一半専 體材質製成之基質主體12,如單晶矽,只有一表面14。 此表面14的一部分上為一導電材質之閘極16,如導電多 晶矽。此閘極16以一薄閘極介電層18(典型上為二氧化 矽)而與表面14絕緣。該閘極16被覆蓋Μ —包封層17(典 型上為二氧化矽),且沿每一側有側壁間隔物19(亦典型 -5- (請先閲讀背面之注意事項再塡寫本頁) --裝. 訂. 本紙張尺度適用中國國家標準(CNS)甲4規格(210 X 297公釐) 82.3. 40,000 Λ 6 B6 經濟部中央櫺準局W3T工消費合作社印製 五、發明説明(4 ) 為二氧化矽),主體12内和表面14上者為所需導電型式 之源極和洩極區20和22。此源極和洩極區20和22位於閘 極16之相對兩側。為說明起見,該電晶體10為一 η通道 絕緣W極場效電晶髑(IGFET),其主艘為ρ型等電性, 而該源極和洩極各為η型導電性,本發明之方法將以於 區22上形成一接點之有闢方式的敘述,然而,應了解本 發明之方法可形成接點於該區域20和22兩者上,或是在 主體12内形成的其他區域上,例如美國專利第4,927,779 (S.H. Dhong 1 990年5月22日公告)所示之埋入式電容器 (buried capacitor)型式。 本發明之方法中,第一步驟為沉積一非摻雜(本質的) 多晶矽層24於主體表面14和閘極16上,此可由已知之化 學蒸鍍技術達成,其中主髓12被曝露於一含矽的氣體中 ,如矽甲烷,且被加热,Μ分解出氣體和表面14上之沉 積多晶矽,一罩幕層26(如一光阻層)被覆蓋於多晶矽層 24上,藉著檷準的光蝕刻步驟,該罩幕層26上具有一開 口 28,此開口位於欲形成接點處的主體表面14區上。多 晶矽層24之曝露部分接著由使用適當的蝕刻劑而予Μ除 去,Μ形成一向下穿透至包含區域22—部分之表面14部 分上之開口 30。 琨參考圖2 ,其顯示在本發明之方法的下一步驟期間 電晶體10之截面圖。該罩幕層26被Μ —適當溶劑而除去 ,接著開口 30之側壁被覆Μ —層氮化矽或其他絕緣材質 -6- (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準(CNS〉甲4规格(2U) X 297公牮) 82.3. 40,000 Λΰ Β6 經濟部中央標準局war工消費合作杜印製 五、發明説明(5 ) 之層32。此可藉沉積一氮化矽曆於多晶矽層24、開口 30 之側壁和開口 30底部之主體表面14的曝露區上的方式達 成,接著,位於多晶矽暦24和開口 30底部的主體表面14 上之氮化矽層部分K 一異方性蝕刻除去,如一電漿蝕刻 ,而留下位於開口 30側壁上之氮化矽層。 現參考圈3 ,其顯示電晶體10經遇本發明之方法的下 一步驟後所形成的截面圃。開口 30被填充Μ已摻雜多晶 矽Μ形成一導罨接點34。此者係由沉横一已摻雜多晶矽 層於該非摻雜多晶矽層24上Κ及開口 30内、接著Μ —缠 合的蝕刻劑將位於非摻雜層24上之已摻雑多晶矽層去除 ,而留下開口 30内之已摻雜多晶矽接點34。在此蝕刻步 驟期間,接點34在其表面内可具有一中空穴36。該接點 34被摻雜Μ任何所需形式之摻雜物,例如η型専電性之 磷。再者,為解釋起見,此接點34最好能被大大摻雜至 5Χ 1020雜質/ cm3之濃度。該摻雜多晶矽可由任何已知 的化學蒸鍍技術沉積之,其中主體12被曝露於一包含矽 之氣體中,如矽甲烷(silane),和包含所需雜質的氣體 中,此主艤12被加熱至使氣體分解和摻雜多晶矽沉積之 溫度。 現參考圖4所示,其顯示電晶體10經過本發明之方法 的次一步驟後之截面圖。多晶矽層20和接點34在一氧化 氣團中加熱至某一溫度,而使一二氧化矽層38形成於層 2 4和該接點3 4之表面上。典型上,此可在7 0 0 t!和9 0 0 Ό (請先閱讀背面之注意事項再塡寫本頁) .裝· 訂_ t 本紙張尺度適用中國國家標準(CNS)甲4規格(210 X Z97公穿) 82.3. 40,000 ^l46i〇 Λ(; Β6 經濟部中央標準局8工消費合作社印製 五、發明説明(6 ) 間之溫度下實施之。當多晶矽依此方式氧化時,形成於 摻雜多晶矽上之二氣化矽膜會較形成於非摻雜多晶矽上 之二氧化矽層為厚。因此,直接沉積於接點34(其為摻 雜多晶矽)上之二氧化矽曆36的一部分40會較位於非接 雑多晶矽層24上之二氧化矽層38的一部分42為大。Μ如 前所述之方式高度摻雜接點34,則二氧化矽層36之較厚 部分40之厚度會多於較薄部分42之厚度兩倍以上。 現參考匾5所示,其顯示電晶體10在經遇本發明之方 法的下一步驟後之截面視圖。Μ適當蝕刻劑蝕刻二氧化 矽層38,直到二氧化矽層38之較薄部分42已被完全地自 非摻雜多晶矽24上除去。雖然該二氧化矽層38之較厚部 分42之厚度減少,但仍保留一部分Μ提供接點34上之覆 罩層,並與該接點自行對齊,非摻雜多晶矽層24之曝露 部分接著利用一適合触刻劑而予Μ除去。在此蝕劑步嫌 期間,接點34被保護,以免於被層38之覆罩部分40和側 壁氮化矽層32蝕刻。 規參考圖6 ,其顯示電晶體10經過本發明之方法的下 一步驟後之截面視圖。將一介電材質之層44(如二氧化 矽)沉穑於閘極16和表面14的曝露區上,Κ完全地圍繞 接點34,此可利用任何已知之化學鍍與技術,沉積一層 二氣化矽於表面14、閘極16和接點34上的方式達成。然 後利用任何已知的平坦化(planarization)技術使該二 氧化矽層平坦化,Μ形成層44,該層圍繞接點34且具有 ------------------ -----裝------訂------^I (請先閱讀背面之注意事項再瑣寫本頁) 本紙張又度適用中國國家標準(CNS)甲4規格(210 X 297 W牮) 82.3. 40,000 經濟部中央標準局8工消費合作社印製 Αβ B6_ 五、發明説明(7 ) 一與接點34表面平面之表面。此使電晶體10具有一可與 其他區域(例如满狀電容,圖上未顯示)横向接觸之導鬣 接點34。此接點是無界的且為覆罩的,Μ致於該接點可 與横越導體線隔離,既然相同的技術也可用Μ形成與埴 些梢越導體線接觸的其他接點,故此點為重要的。DRAM 格(cells)之位元嬢即為其一例。 在本發明之方法中,藉著利用摻雜和非摻雜多晶矽之 氧化率不同的特性,可輕易地將一自我對準之覆罩式二 氧化矽層40沉積於接點34上。該自我對準覆罩曆40K及 _鏡接點34之側壁間隔物氮化矽層30會在除去非摻雜多 晶矽層24和Μ介電層44取代之期間内保護接點34。此可 允許使用任何蝕刻劑來除去該非摻雜多晶矽層24,而簡 化了非摻雜多晶矽層之除去步驟。因此,本發明之方法 能提供一種形成無界接點的簡單方法,其可用為製造包 含接點的積體電路之製程的一部分。 令人激賞和了解的本發明之特定實腌例只是本發明之 通則的例示。不同的修改仍符合與前述之原理。例如, 接點可做至任何形成於基質主體内之裝置。再者,雖然 主體上只顯示一個接點,該裝置可包括任何所需的接點 數和與該接點連接之導電片。瑄些Μ及簡簞的改變皆麗 於下列申請專利範画所定義之本發明之精神。 ------------------一-----裝------訂------^ (請先閱讀背面之注意事項再琐寫本頁) -9- 本紙張尺度適用中國國家標準(CNS)甲4規格UlU X四7公楚) 82.3. 40,000
Claims (1)
- 314610 A7 B7 C7 D7 申請專利範園 經濟部中央標準局W工消費合作社印製 之 ., 而之 留 層矽上 多晶 矽 層 多 置 口 ,上而 矽晶矽 雜多晶 矽雜 装. 開 層矽 , 化多晶 摻雜 多 化 摻 體 之 矽晶 層和 氧該多 Μ 摻 雜 氧。非 導 層 化多 矽; 二於雜 在非 摻 二長在 半 矽 氧雑 化分 該長摻 含蓋 該 該成含 一:;晶 二摻 氧部 中成非 包覆 中 ο 中下包 造驟層多 一非 二的 其式較 尚層 其度其度尚 製步矽雑 長較 的層 ,方層 ,矽 ,濃,溫, 上列晶摻 成度 有矽 法的矽 法化 法雜法的法 體下多非.,上厚 所化 方矽化 方氮 方摻方間方 主Μ雜該口矽矽 去氧。之晶氧 之一 。之之之之之 質含摻遇開晶化 除二層項多二。項用驟項 3 項 ρ 項 材包非穿該多氧 上之矽 1 熱之厚 2 使步 3CR4005 髓其一 一充雑二 矽上晶第加上較第,之第Β/第19第 導,成成填摻之 晶矽多圍中矽長圍前壁園|^_:1圍 雜υ 半法形形矽非上 多晶雜範團晶成範之側範20¾範 ο 範 一 方面面晶和矽 雑多摻利氣多層利 口的利 ο 利70利 於之表表多雜晶.,摻雜非專化雜矽專開口專XI專中專 以點體體雜摻多大非摻該請氧摻化請填開請5X請汽請 用接主主摻該雜為該於去申 一在氧申充之申約申蒸申 種電於於以於摻度自位除據在,二據矽内據含據在據 一導 該厚 下 根係上之根晶矽根包根係根 1 2 3 4 5 6 I---------^--------i -----裝-------~ 訂------. . (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準(CNS)甲4规格(210 X 297公釐> A7 B7 C7 ^_D7_ 六、申請專利範团 (請先閲讀背面之注意事項再填寫本頁) 晶矽被除去Μ後,沉積一二氧化矽層於主體上,Μ圍 繞摻雜多晶矽之步驟。 7. 根據申謫專利範園第6項之方法,尚包含使用圍繞摻 雜多晶矽之二氣化矽層表面平坦化之步驟以與摻雜多 晶矽表面成一平面。 8. —種用Μ於一半導體材質主體之表面上,製造一導電 接點之方法,其包含下列步驟: 於該主體表面沉積一非摻雜多晶矽層; 形成一穿透該非摻雜多晶矽層至主體表面之開口; Μ —氮化矽層覆蓋開口之側壁; Μ摻雜多晶矽充填開口的刺餘部分; 在一氣化氣團下加熱該摻雜和非摻雜多晶矽,於其 上成長一二氧化矽層,而摻雜多晶矽上之厚度較非摻 雜多晶矽上之厚度為厚; 蝕刻該二氧化矽層,Κ除去非摻雜多晶矽上之部分 ,但留下摻雜多晶矽上之二氧化矽層的部分; 除去該非摻雑多晶矽;和 於主體圍繞摻雜多晶矽表面上形成一介電材質層。 9. 根據申請專利範圍第8項之方法,其中該摻雜多晶矽 包含約5x ΙΟ20雜質/ cm3之摻雜濃度。 經濟部中央標_局員工消費合作社印製 10. 根據申謫專利範園第9項之方法,其中該二氧化矽 層係在蒸汽中700C至900C之間的溫度下成長。 11. 根據申請專利範圍第8項之方法,其中該開口是形 -1 1 - 本紙張又度適用中國國家標準(CNS)甲4规格(210 X 297公釐> A7 • B7 C7 _D7_ 六、申請專利範圍 (請先閲讀背面之注意事項再填寫本頁) 成於非摻雜多晶矽内,係藉非摻雑多晶矽上形成一 罩幕層,而該罩幕層具有一貫穿至上述待設於非摻 雜多晶矽層内之開口的開口,然後經流罩幕層内之開 口触刻該非摻雑多晶矽靨的方式形成。 12. 根據申請專利範園第11項之方法,其中該非摻雜多 晶矽層被一適當蝕刻劑去除。 13. 根據申請專利範園第8項之方法,其中該介電材質 層為一沉積在主體表面上之二氧化矽層。 14. 根據申請專利範園第13項之方法,尚包含使圍繞該 摻雜多晶矽之二氧化矽層表面平坦化之步驟,以與 摻雜多晶矽表面圼必要之平面。 15. —種半導體裝置,係根據申請專利範圍第1項之製 程製得之半導體裝置。 16. —種半導體裝置,係根據申請專利範圍第8項之製 程製得之半導體裝置。 經濟部中央標準局R工消費合作社印製 -12- 本紙張尺度適用中國國家標準(CNS)甲4規格(210 X 297公釐〉
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US93792192A | 1992-08-31 | 1992-08-31 |
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TW214610B true TW214610B (en) | 1993-10-11 |
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TW082102998A TW214610B (en) | 1992-08-31 | 1993-04-20 | Method of making contact for semiconductor device |
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US (1) | US5464793A (zh) |
EP (1) | EP0585640B1 (zh) |
JP (1) | JPH0824111B2 (zh) |
KR (2) | KR100290691B1 (zh) |
AT (1) | ATE173357T1 (zh) |
DE (1) | DE69322024T2 (zh) |
TW (1) | TW214610B (zh) |
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JP2720796B2 (ja) * | 1994-11-15 | 1998-03-04 | 日本電気株式会社 | 半導体装置の製造方法 |
US5627103A (en) * | 1995-03-02 | 1997-05-06 | Sony Corporation | Method of thin film transistor formation with split polysilicon deposition |
US6103572A (en) * | 1997-02-07 | 2000-08-15 | Citizen Watch Co., Ltd. | Method of fabricating a semiconductor nonvolatile storage device |
WO1999004427A1 (de) * | 1997-07-15 | 1999-01-28 | Infineon Technologies Ag | Kontaktierung einer halbleiterzone |
JP3090198B2 (ja) * | 1997-08-21 | 2000-09-18 | 日本電気株式会社 | 半導体装置の構造およびその製造方法 |
US6057216A (en) * | 1997-12-09 | 2000-05-02 | International Business Machines Corporation | Low temperature diffusion process for dopant concentration enhancement |
US6215190B1 (en) * | 1998-05-12 | 2001-04-10 | International Business Machines Corporation | Borderless contact to diffusion with respect to gate conductor and methods for fabricating |
US6261924B1 (en) | 2000-01-21 | 2001-07-17 | Infineon Technologies Ag | Maskless process for self-aligned contacts |
US6940134B2 (en) * | 2002-07-02 | 2005-09-06 | International Business Machines Corporation | Semiconductor with contact contacting diffusion adjacent gate electrode |
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GB1388926A (en) * | 1972-03-04 | 1975-03-26 | Ferranti Ltd | Manufacture of silicon semiconductor devices |
US4127931A (en) * | 1974-10-04 | 1978-12-05 | Nippon Electric Co., Ltd. | Semiconductor device |
JPS5922380B2 (ja) * | 1975-12-03 | 1984-05-26 | 株式会社東芝 | ハンドウタイソシノ セイゾウホウホウ |
JPS54158167A (en) * | 1978-06-05 | 1979-12-13 | Toshiba Corp | Manufacture of semiconductor device |
US4694561A (en) * | 1984-11-30 | 1987-09-22 | American Telephone And Telegraph Company, At&T Bell Laboratories | Method of making high-performance trench capacitors for DRAM cells |
US4717678A (en) * | 1986-03-07 | 1988-01-05 | International Business Machines Corporation | Method of forming self-aligned P contact |
US4927779A (en) * | 1988-08-10 | 1990-05-22 | International Business Machines Corporation | Complementary metal-oxide-semiconductor transistor and one-capacitor dynamic-random-access memory cell and fabrication process therefor |
US5198386A (en) * | 1992-06-08 | 1993-03-30 | Micron Technology, Inc. | Method of making stacked capacitors for DRAM cell |
-
1993
- 1993-04-20 TW TW082102998A patent/TW214610B/zh not_active IP Right Cessation
- 1993-06-25 JP JP5179854A patent/JPH0824111B2/ja not_active Expired - Lifetime
- 1993-08-04 EP EP93112505A patent/EP0585640B1/en not_active Expired - Lifetime
- 1993-08-04 AT AT93112505T patent/ATE173357T1/de not_active IP Right Cessation
- 1993-08-04 DE DE69322024T patent/DE69322024T2/de not_active Expired - Lifetime
- 1993-08-31 KR KR1019930017088A patent/KR100290691B1/ko not_active IP Right Cessation
-
1994
- 1994-10-03 US US08/317,151 patent/US5464793A/en not_active Expired - Lifetime
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2000
- 2000-09-18 KR KR1020000054689A patent/KR100363295B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
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JPH06112152A (ja) | 1994-04-22 |
EP0585640A3 (en) | 1994-11-09 |
EP0585640B1 (en) | 1998-11-11 |
KR940004728A (ko) | 1994-03-15 |
EP0585640A2 (en) | 1994-03-09 |
KR100363295B1 (ko) | 2002-12-05 |
DE69322024D1 (de) | 1998-12-17 |
JPH0824111B2 (ja) | 1996-03-06 |
US5464793A (en) | 1995-11-07 |
ATE173357T1 (de) | 1998-11-15 |
KR100290691B1 (ko) | 2001-06-01 |
DE69322024T2 (de) | 1999-04-08 |
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