TW201244002A - Method of forming oxide encapsulated conductive features - Google Patents
Method of forming oxide encapsulated conductive features Download PDFInfo
- Publication number
- TW201244002A TW201244002A TW100148253A TW100148253A TW201244002A TW 201244002 A TW201244002 A TW 201244002A TW 100148253 A TW100148253 A TW 100148253A TW 100148253 A TW100148253 A TW 100148253A TW 201244002 A TW201244002 A TW 201244002A
- Authority
- TW
- Taiwan
- Prior art keywords
- layer
- copper
- barrier layer
- copper alloy
- opening
- Prior art date
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Classifications
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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
- H01L23/53209—Conductive materials based on metals, e.g. alloys, metal silicides
- H01L23/53228—Conductive materials based on metals, e.g. alloys, metal silicides the principal metal being copper
- H01L23/53238—Additional layers associated with copper layers, e.g. adhesion, barrier, cladding layers
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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
- H01L21/70—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
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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
- H01L21/70—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
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76843—Barrier, adhesion or liner layers formed in openings in a dielectric
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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
- H01L21/70—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
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76853—Barrier, adhesion or liner layers characterized by particular after-treatment steps
- H01L21/76855—After-treatment introducing at least one additional element into the layer
- H01L21/76856—After-treatment introducing at least one additional element into the layer by treatment in plasmas or gaseous environments, e.g. nitriding a refractory metal liner
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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
- H01L21/70—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
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76853—Barrier, adhesion or liner layers characterized by particular after-treatment steps
- H01L21/76861—Post-treatment or after-treatment not introducing additional chemical elements into the layer
- H01L21/76864—Thermal treatment
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- 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
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76867—Barrier, adhesion or liner layers characterized by methods of formation other than PVD, CVD or deposition from a liquids
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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
- H01L21/70—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
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76871—Layers specifically deposited to enhance or enable the nucleation of further layers, i.e. seed layers
- H01L21/76873—Layers specifically deposited to enhance or enable the nucleation of further layers, i.e. seed layers for electroplating
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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
- H01L21/70—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
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Plasma & Fusion (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Electrodes Of Semiconductors (AREA)
Description
201244002 六、發明說明: 【發明所屬之技術領域】 本發明係有關半導體裝置中之銅(Cu)及/或銅合金金 λ 屬化,以及有關一種製造具有可信賴,低電阻銅或銅合金 互連之半導體裝置之方法。本發明特別可應用於形成具有 次微米設計形體及高導電率互連結構之高速積體電路,包 含以金屬-氧化物層,如MnOx或AlOx予以實質上均勻地 封裝之銅或銅合金形體。 【先前技術】 在半導體製造中,在金屬互連後段製程(BEOL)加工期 間施加鑲嵌(damascene)。習知鑲嵌加工包含在介電中間層 形成開口及以導電材料,例如,銅或銅合金填充開口,以 形成接觸面、通孔、或線。習知BEOL加工包含在晶圓上 利用配線之個別裝置(電晶體、電容、電阻等)的互連,以 及晶片-對-封裝連接之接觸面、絕緣層(介電質)、金屬層 級、及接合位置的形成。 如第1A-1F圖所示,使用習知鑲嵌製程形成半導體裝 置中之金屬互連。第1A圖顯示形成在介電層103中之溝 槽 101。 由於銅經由介電中間層材料,如二氧化石夕擴散,故銅 或銅合金互連結構必須藉由擴散阻障層予以封裝。第1B 圖顯示沉積在溝槽101之側表面107和底表面109上,以 及介電層103之上表面111上之擴散阻障層105(例如, Ta/TaN)。 3 95469 201244002 種晶層113沉積在阻障層105上,如第1C圖所示。 種晶層113可為銅、或銅合金,如CuMn或CuAl。第1D 圖顯示銅、或銅合金115,通常利用電鍍,填充溝槽101 及種晶層113之上。 然後如藉由化學機械加工(CMP)實施平坦化以自介電 層103移除銅或銅合金115、種晶層113、和阻障層105, 而形成實質上平坦之上表面,如第1E圖所示。 然後沉積覆蓋層117,如氮化矽(SiN)或氮碳化矽 (SiCxNy),如第1F圖所示。 在第1F圖中,當使用銅合金種晶層如CuMn或CuAl 時,錳或鋁在銅或銅合金115與覆蓋層117間之界面析出。 析出量視種晶層113中之錳或鋁濃度及其他製程條件而 定。析出程度可導致種晶層113僅包含銅,而大部份的猛 或鋁因與氧(〇2)反應而轉化成金屬氧化物層119,例如, MnO 或 Al2〇3 〇 除了該種界面外’析出亦發生在任何受損或缺陷位置 (如具有不足夠之阻障層的位置)。第2圖顯示襯有阻障層 203之習知銅或銅合金互連201。習知實務導致合金原子, 如錳或鋁原子205,向著〇2擴散以在銅或銅合金互連2〇1 之上表面207上以及存在著〇2之受損和缺陷位置形成氧 化物層,例如,MnO或Al2〇3。 銅或銅合金互連201中之合金原子,如錳或鋁原子2〇5 輕易地向著〇2擴散以形成氧化物,例如,Mn〇或ALA, 此乃由於其低活化能之故。另一方面,元素原子,如猛或 95469 4 3 201244002 銘存在時’銅不會與〇2反應形成CuO。所得之氧化物層, 例如,MnO或Α1ζ〇3,作為阻障層以防止:(a)銅沿著 Cu/SiCNH界面207擴散而形成CuO; (b) 〇2擴散至銅互連 201中形成CuO;以及(c)錳或鋁繼續擴散至介電層213 中。因此,提昇互連的電遷移(EM)性能。 受損和缺陷位置可為太薄之阻障層203之部份207、 或節點201與介電層213間之缺陷界面211。阻障層203 應完全地包圍整個銅互連201以防止銅擴散至周圍材料中 並且穿過周圍材料。阻障層203應該要足夠厚以限制銅擴 散,因此化學地隔離互連201與介電層213,而且還呈現 足夠高的導電性以維持與導線215的良好電子接觸。然 而,阻障層203在某些位置會太薄以致無法限制銅擴散。 習知實務僅導致氧化物層’例如,MnO或Al2〇3,形 成在存在著〇2之互連201的上表面上或缺陷/破裂襯底區 域207、211。然而,習知實務無法導:致沿著沉積之導電材 料,例如’銅或銅合金的側壁形成實質上均勻的氧化物阻 障層,此乃由於該些位置缺乏〇2之故。 在先進節點如20nm及以下,阻障層(例如,Ta/TaN , Ru)的厚度進一步薄化以促進間隙填充及降低導線電阻。然 而’該種薄化的阻障層沒有強壯到足以禁得起EM、應力 遷移(SM)、或時間相依介電崩潰(TDDB)加壓,且其中可能 含有受損和缺陷區域。因此,BEOL可靠度性能降低。 因此需要存在一種能夠形成封裝金屬互連之實質上 均勻之金屬氧化物阻障層的方法論,因此阻擋銅擴散且提 95469 5 201244002 昇可靠度性能沒有負面地衝擊間隙填充。 【發明内容】 本發明之一方面係一種在BEOL加工期間,形成藉由 實質上均勻之金屬-氧化物層,如MnO或A1203予以封裝 之銅或銅合金互連。 本發明之另一方面係一種包含藉由實質上均勻之金 屬-氧化物層,如MnO或Al2〇3予以封裝之銅或銅合金互 連之半導體裝置。 本發明之其他方面及其他特點將揭露於下述說明 中,而且對熟知此項技藝人士而言在檢視下述說明時在某 種程度上係顯而易見的或者可自本發明的實務學習之。 依據本發明,某些技術功效在某種程度上可藉由包含 下述步驟之方法予以達成:在介電層中形成具有側表面及 底表面之開口,在開口之側表面和底表面上及介電層之上 表面上形成阻障層,以氧氣電漿處理阻障層以在阻障層上 形成懸垂氧原子,在阻障層上形成種晶層,以及以銅或銅 合金填充開口。 本發明之方面包含如藉由CMP平坦化以自介電層之 上表面移除阻障層,種晶層,及銅或銅合金,使得鑲嵌之 銅或銅合金的上表面與介電層的上表面實質上共平面。進 一步方面包含在填充開口之銅或銅合金上提供覆蓋層,如 SiN或SiCxNy。其他方面包含沉積銅合金種晶層,如CuMn 或CuAl,導致形成金屬氧化物層,例如MnO或Al2〇3。 其他方面包含以5A至100 A之厚度沉積阻障層。另一方 6 95469 201244002 面包含以100人至500人之厚度沉積種晶層。依據又一方 面,以5人至20人之厚度形成金屬氧化物層。 ‘ 本發明之另一方面係一種裝置,包含··半導體元件, . 半導體元件上之介電層,填充介電層中之開口之鋼或鋼合 金,以及封裝填充開口之銅或銅合金之金屬氧化物層。 本發明之方面包含裝置,此裝置包含藉由具有5入至 20 A之實質上均勻厚度之氧化物層,例如Mn〇或八丨2〇3 層予以封裝之鑲嵌銅或銅合金。本發明之方面包含在具有 5 A至1〇〇 Λ厚度之阻障層之溝槽中具有銅或銅合金鑲嵌 之裝置。 本發明之另一方面係一種方法,包含:在半導體元件 上提供介電層;在介電層中形成具有侧表面及底表面之溝 槽,在溝槽之側表面及底表面上沉積阻障層;以氧氣電漿 處理阻障層以形成鍵結在阻障層上之懸垂氧;在阻障層上 沉積鋼合金種晶層;以銅(Cu)或銅合金填充溝槽以形成銅 或銅合金鑲嵌及在介電層之上表面上之過覆蓋;以及平坦 化’使得銅或銅合金鑲嵌之上表面與介電層之上表面實質 上共平面,導致封裝銅或銅合金鑲嵌之金屬氧化物層。 由下述之詳細說明,對熟知此項技藝人士而言,本發 明之其他方面及技術功效係顯而易見的,其中本發明之實 施例係藉由意欲實施本發明之最佳模式的說明予以簡單地 陳述。如可暸解般’本發明能夠以其他及不同實施例完成 之’且其數種細節能夠在各種顯而易知方面予以修飾,皆 無偏離本發明。因此,圖式及說明事實上係欲作為說明之 7 95469 201244002 用,而非作為限制之用。 【實施方式】 在下述說明中,為了闡釋之目的,提出許多特定的細 節以提供徹底瞭解示例之實施例。然而,應可清楚暸解, 沒有這些特定的細節或者利用均等的配置亦可實施這些示 例的實施例。其他實例中,在方塊圖中顯示眾所皆知的結 構及裝置以避免非必要地模糊示例之實施例。此外,除非 另有說明,否則應暸解說明書及申請專利範圍中所像用之 成分、反應條件等之表示數量、比率、及數值性質之所有 數值在所有實例中皆以”約”一詞予以修飾。 本發明關注並解決BEOL可靠度性能的問題,尤其當 阻障襯底的厚度減小而調和間隙填充及低線電阻時。本發 明藉由提供能夠形成實質上均勻之金屬-氧化物層,例如, MnO或Al2〇3層、封裝金屬互連,例如,銅或銅合金接觸 面、通孔、或線,因此防止銅擴散至介電層中並且穿過介 電層,故而提昇可靠度性能沒有負面地衝擊間隙填充之方 法論關注並解決該些問題。 依據本發明實施例的方法論係包含在介電層中形成 具有側表面及底表面之開口,在開口之側表面和底表面上 及介電層之上表面上形成阻障層,以氧氣電漿處理阻障層 以在阻障層上形成懸垂氧原子,在阻障層上沉積種晶層, 以及以銅或銅合金填充開口。 由下述之詳細說明,熟知此項技藝人士可淺顯易見地 瞭解阻擋銅自銅或銅合金互連擴散沒有負面地衝擊間隙填 8 95469 201244002 充之又其他方面、特點、及技術功效,其中簡單地藉由意 欲之最佳模式的說明,顯示及陳述較佳實施例。本發明能 夠以其他及不同實施例完成之,且其數種細節能夠在各種 顯而易知方面予以修飾。因此,圖式及說明事實上係欲作 為說明之用’而非作為限制之用。 第3A-3F圖係說明依據本發明實施例之方法論。參照 第3A圖,係藉由例如反應性離子蝕刻(RIE)在介電層303 中形成開口 ’例如,溝槽3〇1。 藉由,例如,物理氣相沉積(PVD)在溝槽301之侧表 面307及底表面309上、及介電層3〇3之上表面311上形 成擴散阻障層305 ’如第3B圖所示。阻障層3〇5可以5人 至loo A之厚度形成之。典型之擴散阻障金屬包含鈕(Ta), 氮化钽(TaN),釕(Ru),始(c〇),或 Ta/TaN。 參照第3C圖,以氧氣電漿313,如30-180秒、於 400-900W 之 RF 電力、i5_35m 托之壓力、1〇〇 4〇〇<^、及 60-12〇SCCm之臭氧(〇3)流動速率處理所得之結構。利用氧 氣電漿之處理沿著溝槽3〇1之側表面3〇7及底表面3〇9在 阻P羊層· 3〇5中形成懸垂氧原子。該些懸垂氧原子隨後反應 以形成封裝氧化物阻障。 參照第3D圖,藉由,例如,物理氣相沉積(pvD)在阻 障層305上沉積種晶層315。種晶層315可形成至1〇〇 A 至500 A之厚度,且可包含鋼合金,如CuMn或CuA1。與 銅種晶層相較下,CuAl種晶層以十倍增加EM壽命,而與 銅種晶層相較下,CuMn種晶層以一百倍增加EM壽命。 9 95469 201244002 如藉由電化學電鍍、無電電鍍、或化學氣相沉積來沉 積導電材料,如銅或銅合金317,以填充溝槽301並在介 電層302上形成過覆蓋317,如第3E圖所示。然後如藉由 CMP實施平坦化以自介電層301之上表面移除過覆蓋 317,及阻障層305和種晶層315,形成實質上平坦之上表 面,如第3F圖所示。 後續如藉由化學氣相沉積(CVD)沉積覆蓋層319。覆蓋 層319可包含SiN或SiCxNy。 種晶層315中之合金金屬原子,例如,錳或鋁析出至 先前形成之懸垂氧原子以形成封裝之氧化物層,例如, MnO或Al2〇3。析出量視銅合金種晶層中之錳或鋁濃度及 各種製程條件而定。在某些實施例中,析出足以導致實質 上之銅種晶層,使得實質上所有的錳或鋁皆析出以形成實 質上均勻之封裝MnO或Al2〇3氧化物層321。一般而言, 該種保護性氧化物層係在銅或銅合金沉積之前形成之。 EDX/EELS分析確認懸垂氧鍵結可完全地氧化來自5 A至 20人厚度之種晶層之錳或鋁原子以形成實質上均勻之 MnO或Al2〇3封裝層。 本發明之實施例可達成數種技術功效,包含阻擋銅自 銅或銅合金互連擴散,因此提昇EM壽命沒有負面地衝擊 間隙填充。本發明在各種高度集成之半導體裝置之任一種 上具有產業應用性。 在前述說明中,本發明係參照其特定示例之實施例予 以說明。然而,可證明可對其進行各種修飾及變更沒有偏
10 95469 S 201244002 ο 離本發明之較廣精神及範圍,如申請專利範圍所述。因此, 說明及圖式欲視為係說明之用而非限制之用。可暸解本發 明能夠使用各種其他組合及實施例且在本文所示之本發明 Ο 概念之範圍内能夠有任何變更或修飾。 ' 【圖式簡單說明】 在隨附的圖式中,本發明係藉由實施例予以說明,而 非予以限制,且圖式中類似的參考數值係指類似的元件, 其中: 第1Α至1F圖係圖解地說明形成半導體裝置中之金屬 互連的習知鑲嵌製程; 第2圖係圖解地說明襯有阻障層之習知互連;以及 第3Α至3F圖係圖解地說明依據本發明實施例之形成 半導體裝置中之金屬互連的製程流程。 【主要元件符號說明】 101 、 301 溝槽 103 、 213 、 303 介電層 105 、 203 、 305 阻障層 107 、 307 側表面 109 、 309 底表面 111 、 207 、 311 上表面 113 、 315 種晶層 115 、 317 銅或銅合金 117 、 319 覆蓋層 119 、 321 金屬氧化物層 11 95469 201244002 201 互連 205 在孟或銘原子 209 節點 211 缺陷界面 215 導線 313 氧氣電漿 12 s 95469
Claims (1)
- 201244002 七、申請專利範圍: 1. 一種方法,包括: 在介電層中形成具有側表面及底表面之開口; 在該開口之該側表面及該底表面上和該介電層之 上表面上形成阻障層; 以氧氣電漿處理該阻障層,以在該阻障層上形成 懸垂氧原子; 在該阻障層上沉積種晶層;以及 以銅(Cu)或銅合金填充該開口, 導致在該銅或銅合金的上及底表面上和沿著填充 該開口之該銅或銅合金之側表面形成金屬氧化物層。 2. 如申請專利範圍第1項所述之方法,包括自該介電層 之該上表面移除該阻障層、該種晶層、及該銅或銅合 金。 3. 如申請專利範圍第2項所述之方法,包括在填充該開 口之該銅或銅合金上形成覆蓋層。 4. 如申請專利範圍第3項所述之方法,其中該覆蓋層包 括氮碳化矽(SiCxNy)。 5. 如申請專利範圍第1項所述之方法,包括沉積作為該 種晶層之銅合金。 6. 如申請專利範圍第5項所述之方法,包括沉積作為該 種晶層之CuMn或CuAl合金,其中該金屬氧化物層包 括 MnO 或 AI2O3。 7. 如申請專利範圍第1項所述之方法,包括以5人至100 95469 201244002 人之厚度沉積該阻障層。 8.如申請專利範圍第1項所述之方法,包括以100 A至 500 A之厚度沉積該種晶層。 9·如申請專利範圍第1項所述之方法,包括以5 A至20 A 之厚度形成該金屬氧化物層。 10. —種裝置,包括: 半導體元件; 在該半導體元件上之介電層; 填充該介電層中之開口之銅或銅合金;以及 封裝填充該開口之該銅或銅合金之金屬氧化物 層。 11. 如申請專利範圍第10項所述之裝置,其中該金屬氧化 物層包括MnO或Al2〇3。 12. 如申請專利範圍第10項所述之裝置,進一步包括加襯 該開口之阻障層。 13. 如申請專利範圍第10項所述之裝置,其中該金屬氧化 物層具有5人至20 A之實質上均勻之厚度。 14. 如申請專利範圍第10項所述之裝置,其中該阻障層具 有5A至1〇〇人之厚度。 15. 如申請專利範圍第10項所述之裝置,其中: 該開口為溝槽;以及 填充該溝槽之該銅或銅合金為導線。 16* —種方法,包括: 在半導體元件上提供介電層; 95469 2 201244002 在該介電層中形成具有側表面及底表面之溝槽; 在該溝槽之該側表面及該底表面上沉積阻障層; 以氧氣電漿處理該阻障層,以在該阻障層上形成 懸垂氧原子; 在該阻障層上沉積銅合金種晶層; 以銅(Cu)或銅合金填充該溝槽,以形成銅或銅合金 鑲嵌及在該介電層之上表面上之過覆蓋;以及 平坦化,使得該銅或銅合金鑲嵌之上表面與該介 電層之該上表面實質上共平面, 導致形成封裝該銅或銅合金鑲嵌之金屬氧化物 層。 17. 如申請專利範圍第16項所述之方法,包括沉積作為該 種晶層之CuMn合金或CuAl合金。 18. 如申請專利範圍第17項所述之方法,其中該金屬氧化 物層包括MnO或Al2〇3。 19. 如申請專利範圍第16項所述之方法,包括以5 A至100 A之厚度沉積該阻障層。 20. 如申請專利範圍第16項所述之方法,其中係以5人至 20 A之厚度形成該金屬氧化物層。 3 95469
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US20140061915A1 (en) * | 2012-08-30 | 2014-03-06 | International Business Machines Corporation | Prevention of thru-substrate via pistoning using highly doped copper alloy seed layer |
US8765602B2 (en) | 2012-08-30 | 2014-07-01 | International Business Machines Corporation | Doping of copper wiring structures in back end of line processing |
TW201421637A (zh) * | 2012-11-30 | 2014-06-01 | Ind Tech Res Inst | 利用自我成長阻障之阻障層結構及使用該結構之溝槽式半導體結構 |
CN105226050A (zh) * | 2014-06-09 | 2016-01-06 | 旺宏电子股份有限公司 | 半导体结构及其制造方法 |
US9455182B2 (en) | 2014-08-22 | 2016-09-27 | International Business Machines Corporation | Interconnect structure with capping layer and barrier layer |
US11075179B2 (en) | 2018-08-30 | 2021-07-27 | Taiwan Semiconductor Manufacturing Co., Ltd. | Semiconductor device and method of forming the same |
CN111009644B (zh) * | 2019-11-13 | 2023-09-22 | 天津工业大学 | 纳米多孔铜表面修饰MnO/石墨烯复合电极的制备方法 |
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JP4236201B2 (ja) * | 2005-08-30 | 2009-03-11 | 富士通マイクロエレクトロニクス株式会社 | 半導体装置の製造方法 |
KR100729126B1 (ko) * | 2005-11-15 | 2007-06-14 | 동부일렉트로닉스 주식회사 | 반도체 소자의 금속 배선 및 그 형성 방법 |
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