TWI303098B - Semiconductor device with low contact resistance and method for fabricating the same - Google Patents

Semiconductor device with low contact resistance and method for fabricating the same Download PDF

Info

Publication number
TWI303098B
TWI303098B TW093139348A TW93139348A TWI303098B TW I303098 B TWI303098 B TW I303098B TW 093139348 A TW093139348 A TW 093139348A TW 93139348 A TW93139348 A TW 93139348A TW I303098 B TWI303098 B TW I303098B
Authority
TW
Taiwan
Prior art keywords
layer
epitaxial
contact plug
forming
metal layer
Prior art date
Application number
TW093139348A
Other languages
English (en)
Other versions
TW200541052A (en
Inventor
Tae-Hang Ahn
Original Assignee
Hynix Semiconductor Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hynix Semiconductor Inc filed Critical Hynix Semiconductor Inc
Publication of TW200541052A publication Critical patent/TW200541052A/zh
Application granted granted Critical
Publication of TWI303098B publication Critical patent/TWI303098B/zh

Links

Classifications

    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10BELECTRONIC MEMORY DEVICES
    • H10B99/00Subject matter not provided for in other groups of this subclass
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04Manufacture 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
    • H01L21/18Manufacture 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
    • H01L21/28Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
    • H01L21/283Deposition of conductive or insulating materials for electrodes conducting electric current
    • H01L21/285Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
    • H01L21/28506Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
    • H01L21/28512Deposition 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
    • H01L21/28525Deposition 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 semiconducting material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04Manufacture 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
    • H01L21/18Manufacture 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
    • H01L21/28Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70Manufacture 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
    • H01L21/71Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/768Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
    • H01L21/76801Applying 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
    • H01L21/76802Applying 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 by forming openings in dielectrics
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70Manufacture 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
    • H01L21/71Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/768Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
    • H01L21/76801Applying 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
    • H01L21/76802Applying 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 by forming openings in dielectrics
    • H01L21/76814Applying 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 by forming openings in dielectrics post-treatment or after-treatment, e.g. cleaning or removal of oxides on underlying conductors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70Manufacture 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
    • H01L21/71Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/768Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
    • H01L21/76838Applying 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
    • H01L21/76841Barrier, adhesion or liner layers
    • H01L21/76843Barrier, adhesion or liner layers formed in openings in a dielectric
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70Manufacture 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
    • H01L21/71Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/768Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
    • H01L21/76838Applying 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
    • H01L21/76841Barrier, adhesion or liner layers
    • H01L21/76843Barrier, adhesion or liner layers formed in openings in a dielectric
    • H01L21/76847Barrier, adhesion or liner layers formed in openings in a dielectric the layer being positioned within the main fill metal
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70Manufacture 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
    • H01L21/71Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/768Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
    • H01L21/76838Applying 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
    • H01L21/76841Barrier, adhesion or liner layers
    • H01L21/76853Barrier, adhesion or liner layers characterized by particular after-treatment steps
    • H01L21/76855After-treatment introducing at least one additional element into the layer
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70Manufacture 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
    • H01L21/71Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/768Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
    • H01L21/76838Applying 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
    • H01L21/76877Filling of holes, grooves or trenches, e.g. vias, with conductive material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70Manufacture 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
    • H01L21/71Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/768Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
    • H01L21/76838Applying 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
    • H01L21/76886Modifying permanently or temporarily the pattern or the conductivity of conductive members, e.g. formation of alloys, reduction of contact resistances
    • H01L21/76889Modifying permanently or temporarily the pattern or the conductivity of conductive members, e.g. formation of alloys, reduction of contact resistances by forming silicides of refractory metals
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/48Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H01L23/482Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of lead-in layers inseparably applied to the semiconductor body
    • H01L23/485Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of lead-in layers inseparably applied to the semiconductor body consisting of layered constructions comprising conductive layers and insulating layers, e.g. planar contacts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02367Substrates
    • H01L21/02428Structure
    • H01L21/0243Surface structure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02518Deposited layers
    • H01L21/02521Materials
    • H01L21/02524Group 14 semiconducting materials
    • H01L21/02532Silicon, silicon germanium, germanium
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02518Deposited layers
    • H01L21/0257Doping during depositing
    • H01L21/02573Conductivity type
    • H01L21/02576N-type
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02518Deposited layers
    • H01L21/02587Structure
    • H01L21/0259Microstructure
    • H01L21/02592Microstructure amorphous
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104Forming layers
    • H01L21/02365Forming inorganic semiconducting materials on a substrate
    • H01L21/02612Formation types
    • H01L21/02617Deposition types
    • H01L21/0262Reduction or decomposition of gaseous compounds, e.g. CVD
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001Technical content checked by a classifier
    • H01L2924/0002Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Landscapes

  • 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)
  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
  • Electrodes Of Semiconductors (AREA)
  • Semiconductor Memories (AREA)

Description

1303098 九、發明說明: 【發明所屬之技術領域】 本發明係關於一種半導體技術,尤指一種具有低接觸 電阻的裝置(device,或稱元件,下稱裝置)及其製造方法。 【先前技術】 因半導體裝置業已高度積體化,故半導體裝置之尺寸 乃成爲小型化。因此,就動態隨機存取記憶體(DRAM)裝置 而言,大規模的聚積及尺寸的減小業已對胞電晶體(cell transistor)之接觸區形成極大的衝擊。亦即,因半導體裝置 業已高度積體化及小型化,故用於接觸區之面積乃亦因之 而減縮;但是,此種減縮的面積將導致接觸電阻的增加及 驅動電流的減少,此將更造成半導體裝置的降級,例如, 再新(refresh)特性及寫回復特性(tWR)等的降級。 因此,爲了減少接觸電阻並改善驅動電流,乃在一基 板之接合區摻入以高濃度的摻雜劑,或是在多矽層內摻入 目前用作摻雜劑之某種濃度的磷(p),用以增加接觸。但是 ,該等方法之缺點爲將增加洩漏電流且再新特性(tREF)及 資料保留時間均將降級。 上述之多矽層,係在一個批次型之爐內使用矽烷 (SiH4)/磷化氫(PH3)之氣體在約5 00°C至600°C的溫度範圍 內生成,此際,磷的摻入濃度範圍係自O.ixiO20原子/ cm3 至3.0x1 02G原子/ cm3。再者,即使多矽層之沈積生成係在 大氣壓力下使用氮氣作爲排氣氣體進行之’但是由於所產 生之氧的濃度有若千P Pm ’故多矽層及基板間之介面將形 1303098 $ _•個I薄的氧化層。此種薄氧化層即是增加接觸電阻的因 素之一,將使多砍層具有高準位的接觸電阻。結果,因半 導H裝置業已大幅積體化,上述使用多矽層用以形成接觸 的方法,對於改善接觸電阻及裝置特性極爲有限。 因此,乃有一種克服上述問題及限制的提案,係使用 一種單一型化學蒸汽沈積生長(CVD)裝置用以形成一外延 的矽層。其中一個代表性的方法係一種選擇性外延生長 (S E G)法,其係由一顯露的基板選擇性的生長一個外延之矽 層。雖然,經由s E G法之使用作成所希冀厚度而獲得良好 品質的外延矽層,但是S E G法須在8 5 0 °C之高溫作氫烘 (hydrogen bake)並在800 °C溫度成長該延展的砂層等的處 理,故實難以把SEG法應用於半導體裝置的製造加工上。 第1圖爲半導體基板構造圖,其中係利用一多矽層或 一外延矽層形成一接觸插塞。此處,101、102、103、104 、及1 〇 5分別爲一矽基板、一閘構造、一接合區、一絕緣 層、及一摻雜質的多矽層或摻雜質的外延矽層。 近來,使用固相外延(SPE)法用以形成一外延之矽構造 的方法成爲一種焦點提案,可用以克服使用S E G法之多矽 層所導致上述的問題與限制。SPE法最近成爲焦點的理由 係以低溫即可形成外延之矽構造且其摻雜物濃度不高。再 者,使用低摻雜物濃度即可完成SPE法。 依S P E法,摻雜以相當低濃度的磷暨使用S i η 4 / ρ η 3氣 體而在約5 00 °C至65 0 °C之溫度範圍下,即可形成無定形的 矽層。特別的是,磷的濃度範圍爲自lxl〇19原子/ cm3至1 -6- 1303098 χ102()原子/cm3。且實現SPE法後’外延之矽層係形成在底 部而無定形的矽層形成在外延之矽層上。 之後,在約5 5 0°C至650°C之溫度範圍下,於一氮氣環 境中實行約3 0分鐘至1 0小時的熱處理,則經此種的熱處 理,外延之矽層乃自基板之介面至一接觸的上方區域作再 生長,並因而,SPE乃引用於此一再生長之外延矽層。 如上述,把多矽層用作接觸材料時,磷的摻入濃度須 大於1x1 02()原子/cm3俾可減少接觸電阻。但是,對於再新 特性仍爲降級,故仍爲一大問題。因外延之矽層係以介面 特性作改善,故即使是施加低濃度的磷,其亦可保持相當 低準位的接觸電阻。 但是,100nm以下半導體技術中之大規模積體更須保 持極低的接觸電阻。故而,因外延矽之電阻性約爲Ιχΐ 〇·3 m Ω -cm且其甚難獲得低於上述數値的電阻性,故對於克服 電阻性仍有其限制。因之,倘將外延矽層應用於1 〇〇nm以 下或次一代的半導體技術中時,仍需開發一種用以形成接 觸插塞的方法,其中該插塞的接觸電阻在比較使用外延矽 層時之接觸電阻必須低下極多方可,再者,亦須可確實半 導體裝置之可靠性及產能等。 【發明內容】 本發明之目的,係提供一種具有低接觸電阻的半導體 裝置及其製造方法,足以獲得超高積體化半導體裝置之各 種電氣特性。 依本發明之一態樣,係提供一種半導體裝置,包括: 1303098 一具有一接觸孔之基板構造,用以顯露一預設的部分;及 一形成在接觸孔上之接觸插塞,其中接觸插塞設有充塡於 接觸孔內一部分之外延的矽層及形成在該外延矽層上之一 金屬層,係充塡於接觸孔內之其餘部分。 依本發明之另一態樣,係提供一種用於製造半導體裝 置的製造方法,包括以下步驟:將一基板構造的一部分顯 露而形成一接觸孔;及在接觸孔上依序形成一外延的矽層 及一金屬層,因而獲致一接觸插塞。 【實施方式】 依本發明具有低接觸電阻之半導體裝置及其製造方法 ,將舉示實施例並佐以附圖詳細說明如後。 在以下本發明之實施例中,除了使用外延之矽以獲得 較低的接觸電阻外,並建議使用金屬作爲接觸插塞的材料 。如眾所周知,因爲金屬的電阻性低於矽約1 0 0 0倍,故就 接觸電阻而言,使用金屬作爲接觸插塞之材料自屬最佳。 又者,使用金屬時,由接觸插塞至一接合面即無摻雜劑的 擴散,故於再新特性上即未有摻雜劑的效應存在。此外, 發生如同諸多金屬原子直接接觸外延矽之雜質及深準位雜 質等問題,可使用矽化物處理方式用以引起所使用的金屬 和以預定厚度生長的外延矽層一起作反應而解決之。嗣後 ,將對此種特殊構成的接觸插塞詳述之。 第2圖爲動態隨機存取記憶體(DRAM)裝置之一部分圖 示,其中接觸插塞係依本發明之一實施例作成。 如圖所示,包含多個閘構造202及一接合區203的多 1303098 數電晶體係形成在一矽基板201上。在一包圍閘構造202 之絕緣層204的一個預定部分上作蝕刻以形成一接觸孔 100,而位設在該接觸孔1〇〇間之該接合區203上則形成一 接觸插塞220。 詳言之,接觸插塞220係包括:形成在基板201上並 充塡入接觸孔1〇〇 —部分之一外延的矽層205A ;以薄形成 在外延矽層205 A及接觸孔100側壁上之一金屬矽化物層 206A及一阻擋金屬層207;以及形成在阻擋金屬層207上 並充塡入接觸孔1〇〇內其餘部分之一金屬層208。特別者 ,金屬矽化物層206A係在一原始沈積生長之金屬層、此一 金屬層之基礎材料係選自以鈦(Ti)、鈷(Co)及鎳(Ni)等組成 之群組、施作熱處理而獲得者。亦即,金屬矽化物層206A 可爲鈦矽化物(TiSi2)層、鈷矽化物(CoSi2)層及鎳矽化物 (Ni Si)層三者中的一者。阻擋金屬層207係以例如鈦氮化物 (TiN)或鎢氮化物(WN)之材料製成。金屬層20 8則爲鎢(W) 特別者,外延矽層205A係使用固相外延(SPE)法作成 而非爲熱處理方式。此時,外延矽層205 A之磷(P)或砷(As) 的摻雜濃度範圍約在lxl〇18原子/cm3至ΐχΐ〇2ι原子/cm3 間,且其電阻性約爲1 X 1 0_3m Ω - cm。較諸於多矽,外延矽 層205A在相當低的摻入濃度中即具有較低的電阻値。又者 ,金屬矽化物層20 6A、阻擋金屬層207及金屬層2〇8之電 低P 爲低 A者 05塞 2 插 層觸 矽接 延用 外習 較 比 均阻 値電 阻的 cbM 插 觸 接 之 明 發 本 依 之 因 1303098 第3 A〜3 D圖爲剖面圖,用以說明形成依本發明實施 例之接觸插塞的方法。此處,與第2圖之相同元件使用相 同符號。 如第3 A圖所示,在基板201上形成複數個閘構造202 因而形成多數的電晶體,之後,閘構造202間之基板201 的一部分上形成一接合區20 3。覆蓋各閘構造202底部、 上部、及諸側壁之一絕緣層204,係在形成諸電晶體的當 中並在電晶體形成後予以形成之。雖所舉示之絕緣層爲一 層,但絕緣層204亦可爲包括閘絕緣層、掩罩絕緣層及隔 片絕緣層等之複層式。之後,將絕緣層204之一部分敞開 以形成一接觸孔1 〇〇,係充塡有插塞材料者。 如第3B圖所示,利用固相外延(SPE)法在約5 00°C〜 7〇〇°C之範圍中使用矽烷(SiH4)/磷化氫(PH3)之氣體形成外 延的矽構造205。再者,於一化學性蒸汽沈積生成(CVD) 裝置中完成SPE法。嗣後,引用SPE法於SPE-矽構造而獲 取外延之矽構造。非爲熱處理之SPE-矽構造205包括形成 在基板201之介面,例如接合區203上的外延矽層205A; 及形成在外延矽層205A上之一無定形矽層205B。此時, SPE-砂構造205A係摻入濃度範圍約在ιχι〇18原子/cm3〜1 xlO21原子/ cm3的磷(P)或砷(As)。 如上述,在習用的方法中,基板之介面上最先所形成 的外延矽層,係施行熱處理方式,在約5 5 0 °C〜6 5 0 °C之溫 度範圍中,以約3 0分鐘至1 〇小時時間,將其朝向無定形 砂層作引伸的再成長,此種外延矽層之再成長結果,乃使 -10- 1303098 得接觸孔充塡以外延的矽層。 但是,除了使外延矽層再成長以充塡接觸孔1 〇〇的方 式外,關於充塡接觸孔1 00,本發明另提供一種不同的方 法,亦即,依本發明,係將無定形之矽層2 0 5 B由SPE-矽 構造205去除之,且之後,在外延的矽層205A上依序形成 以金屬矽化物層、阻擋金屬層及金屬層,因而亦可充塡接 觸孔1 00。如第3 C圖所示,可就接觸孔埋底作詳細說明。 如第3 C圖所示,施行濕式蝕刻加工及/或乾式蝕刻加 工將無定形之矽層205B去除之,之後,在外延之矽層205A 上依次形成第1金屬層206、第2金屬層207及第3金屬 層20 8。此處,第1金屬層之基礎材料係選自以Ti、Co、 及Ni所組成的群組。作爲阻擋金屬層之第2金屬層207, 係以TiN及WN製成,而第3金屬層則以W製成。 如第3D圖所示,遂行蝕回處理或化學機械拋光(CMP) 處理,直到第1金屬層206、第2金屬層207及第3金屬 層20 8殘留於接觸孔100內爲止。此處,在後續的熱處理 之後,第1金屬層206乃成爲一金屬矽化物層20 6A,亦即 ,第1金屬層206係成爲TiSi2、CoSi2或NiSi層。 在使用SPE法之前,於基板201之顯露部分,例如基 板201之接合區203上最好施作一種在位的濕式清理及/或 乾式清理過程,俾可令外延的矽層205A由基板201作良好 的生長。濕式清理過程係使用氫氟(HF)之清理用化學物, 而乾式清理過程者,係使用氫(H2)氣或氫(H2)與氮氣(N2) 的混合氣體的電漿處理過程。濕式清理過程及電漿處理過 -11- 1303098 程係室溫〜400 °C的溫度範圍內達成之。 實施在位的濕式清理或乾式清理過程之後的基板構造 係置入CVD裝置中,其可使用氫基氣體作熱處理。此際, 此種熱處理過程係作爲一種在位的清理過程遂行之,且亦 可省略。亦即,無論是否有施作熱處理過程,均可獲得SPE-矽構造2 0 5。 又者,於溫度範圍約5 00t〜700°C中形成SPE-矽構造 205後,亦可在溫度範圍約5 5 0 °C〜6 5 0 °C之氮環境中以約 3 0分鐘〜1 0小時之時間施行熱處理過程,使外延的矽層 205A作再成長。 將無定形之矽層205B去除後,於形成第1〜第3金屬 層206、207與208之前,可將外延之矽層205A以濕式清 理或乾式清理過程作預處理。 特別的是,其上形成有SPE-矽構造205之CVD裝置 各種範例,均爲一種低壓(LP)CVD裝置、極低壓(VLP)CVD 裝置、電漿增強(PE)CVD裝置、超高真空(UHV)CVD裝置 、急熱(RT)CVD裝置、大氣壓(AP)CVD裝置、及分子束外 延(MB E)。上述所列出中之任何一種CVD裝置及一物理性 蒸汽沈積生成(PVD)裝置均可用以形成第1〜第3金屬層 206〜20 8 〇此外,SPE-矽構造205係摻雜以磷或砷。 依本實施例,具有第1〜第3金屬層、及不須實行熱 處理過程用以令外延層再生長所獲得的SPE-矽構造、等之 接觸孔的埋底(burial),具有降低接觸插塞之電阻的功效。 同樣的,當外延矽層殘留於接觸孔內之同時係將無定形矽 -12- 1303098 層去除,故不須施行後續5 5 0°C〜6 5 0 °C溫度範圍中用以令 外延矽層再生長的熱處理過程.。結果,除了可簡化加工處 理流程外並可減除熱處理之費用。又者,另一種功效爲, 依本發明所形成之接觸插塞,其接觸電阻甚低,故可改善 半導體裝置之可靠性與產能。 本申請案所含之主題與意旨係對應於2004年6月9日 在韓國專利局所申請之第KR 42309號專利申請案,該韓國 專利申請案之全篇內容可供本案之參照。 另者,本發明業已舉示某些實施例說明如上,惟應陳 明者,乃此道技術行家自可作不同的改變與修飾,但均不 脫離本發明之創新精神與技術思想,均應屬本發明專利保 護範疇。 【圖式簡單說明】 弟1圖爲半導體基板構造之圖不,其中係利用多砂及 外延矽兩者中之一者形成習用之接觸插塞。 弟2圖爲半導體基板構造之圖不,其中係依本發明之 一實施例形成接觸插塞。 第3A〜3D圖爲剖面圖,用以說明製造依本發明一實 施例之接觸插塞的方法。 【主要元件符號說明】 100 接觸孔 10 1 矽基板 102 閘構造 103 接合區 -13- 絕緣層 摻有雜物之矽層 矽基板 閘構造 接合區 絕緣層 S P E -矽構造 第1金屬層 阻擋金屬層 金屬層 接觸插塞 -14-

Claims (1)

1303098— X
^?n ί B 方法」專利案 _ 具有低接觸電阻的半導體元件及其製造 (2007年3月修正) 十、申請專利範圍: 1 . 一種具有外延矽層之半導體接觸插塞’包括: 基板構造,設有一接觸孔用以顯露一預定的部分; 形成在該接觸孔上之接觸插塞,其中該接觸插塞設 有充塡於該接觸孔一部分中的一外延矽層,及形成於該 外延矽層上之一金屬層,係用以充塡該接觸孔之其餘部 # 分;以及 依序形成在該外延矽層及該金屬層間之一金屬矽化 物層及一阻障金屬層。 2 ·如申請專利範圍第1項之半導體接觸插塞,其中該外延 矽層係一原始外延之矽構造的一個成分,該原始外延之 矽構造係不須伴同熱處理而僅遂行一種固相外延即可獲 得者。 3 ·如申請專利範圍第2項之半導體接觸插塞,其中該原始 ® 外延之矽構造包括外延的矽層及一無定形的矽層。 4·如申請專利範圍第2項之半導體接觸插塞,其中該原始 外延之矽構造係在約5 0 0 °C至7 0 0 °C之溫度範圍內使用矽 烷(SiH4)/磷化氫(PH3)形成者。 5 .如申請專利範圍第2項之半導體接觸插塞,其中該外延 之矽層係摻雜濃度範圍約在1 X 1018原子/cm3至1 X 1〇21 原子/cm3之磷(P)及砷(As)兩者中之一者。 1303098 6 ·如申請專利範圍第2項之半導體接觸插塞’其中該原始 外延之矽構造的獲得與熱處理不相關聯,而係使用一種 氫基氣體,並在原始外延之矽層形成前在原位作施加者 〇 7 .如申請專利範圍第2項之半導體接觸插塞,其中在原始 外延之矽構造形成之後,可選用遂行熱處理,用以令外 延之矽層作再生長。 8·如申請專利範圍第1項之半導體接觸插塞,其中該金屬 層包括鎢。 9.如申請專利範圍第1項之半導體接觸插塞,其中該金屬 矽化物層係以選自以鈦矽化物(TiSi2)、鈷矽化物(C〇Si2) 及鎳矽化物(NiSi)所構成群組(group)之材料爲基礎者。 1 〇 .如申請專利範圍第1項之半導體接觸插塞,其中該阻障 金屬層係以選自鈦氮化物(TiN)及鎢氮化物(WN)兩者中 之一的材料爲基礎者。 1 1 ·如申請專利範圍第1項之半導體接觸插塞,其中該基板 構造包括: 形成在一基板上多數個閘構造; 形成在該基板之複數個部分上之複數個接合區,該 基板則係位設在該等閘構造間;及 用以覆蓋該等閘構造之一絕緣層。 1 2 .如申請專利範圍第 1 0項之半導體接觸插塞,其中該接 觸孔係顯露一胞區(cell region)中之一電晶體的接合區 -2- 1303098 1 3 · —種用以製造具有外延矽層之半導體接觸插塞之方法, 包括以下步驟: 將一基板構造的一部分予以顯露,因而形成一接觸 孔; 在該接觸孔上依次形成一外延的矽層及一金屬層, 因而獲得一接觸插塞;以及 在外延的矽層及金屬層之間依序形成一金屬矽化物 層及一阻障金屬層。 1 4 ·如申請專利範圍第 1 3項之方法,其中用以形成該接觸 0 插塞之步驟所包括之步驟爲·· 在接觸孔上以遂行一種固相外延(SPE)之方法形成 含有外延矽層及一無定形矽層之一外延矽構造; 去除該無定形矽層;及 在外延之矽層上形成金屬層。 15·如申請專利範圍第 14項之方法,其中用以形成外延之 矽構造係在約5 0 0 °C至7 0 0 °C之溫度範圍內使用S i Η 4 / Ρ Η 3 之氣體進行者。 · 1 6 ·如申請專利範圍第 1 4項之方法,其中該外延之矽構造 摻雜有磷及砷兩者中之一者,其濃度範圍在約1Χ1018 原子/cm3至1Χ1021原子/cm3之間。 1 7 ·如申請專利範圔第 1 4項之方法,其中用以形成接觸插 塞之步驟尙包括以下步驟:在形成外延之矽構造之步驟 後,可作熱處理以令該外延的矽層作再生長。 1 8 .如申請專利範圍第 1 3項之方法,其中形成金屬層之步 1303098 驟包括以下的步驟: 在該外延的矽層上依次形成金屬矽化物層及阻障金 屬層; 在阻障金屬層上形成金屬層;及 遂行蝕回(etch-back)處理及化學機械拋光處理兩種 中之一種處理,直到金屬矽化物層、阻障金屬層、及金 屬層殘留於接觸孔的內側爲止。 1 9 ·如申請專利範圍第 1 8項之方法,其中該金屬矽化物層 係以選用來自Ti Si 2、CoS i2及Ni Si所構成群組之材料 ® 爲基礎者。 20·如申請專利範圍第 1 8項之方法,其中該阻障金屬層之 材料係選自TiN及WN兩者中之一者。 2 1 ·如申請專利範圍第 1 8項之方法,其中該金屬層包括鎢 〇 22·如申請專利範圍第 14項之方法,其中用以形成該接觸 插塞之步驟尙包括以下步驟:在以S P E法形成外延之矽 構造前,使用濕式淸理加工或乾式淸理加工方式對基板 β 構造之顯露部分實施淸理。 2 3 ·如申請專利範圍第 1 4項之方法,其中用以形成接觸插 塞之步驟尙包括以下步驟:以SPE法形成外延之矽構造 前,使用濕式淸理加工及乾式淸理加工對基板構造之顯 露部分實施淸理。 2 4 ·如申請專利範圍第 1 4項之方法,其中用以形成接觸插 塞之步驟尙包括以下步驟:在形成金屬層前,對去除無 -4- 1303098 定形之矽層後所顯露的外延矽層以濕式淸理加工或乾式 淸理加工作淸理。 25.如申請專利範圍第14項之方法,其中用以形成接觸插 塞之步驟尙包括以下步驟:在形成金屬層前,對去除無 定形之砂層後所顯露的外延矽層以濕式淸理加工或乾式 淸理加工作淸理。 26·如申請專利範圍第I4項之方法,其中用以形成接觸插 塞之步驟尙包括以下步驟:在實現外延之矽層前,利用 一種氫基氣體遂行一種在位的(in-situ)熱處理。 馨 27·如申請專利範圍第13項之方法,其中在形成該接觸孔 之步驟上,該基板構造係經由以下諸步驟而作成: 在一基板上形成多數個閘構造; 在位於.複數個閘構造間之基板的複數個部分上形成 複數個接合區; 在閘構造及基板上形成一絕緣層;及 蝕刻該絕緣層,以圍住該等閛構造。
TW093139348A 2004-06-09 2004-12-17 Semiconductor device with low contact resistance and method for fabricating the same TWI303098B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040042309A KR100603588B1 (ko) 2004-06-09 2004-06-09 낮은 콘택 저항을 갖는 반도체 소자 및 그 제조 방법

Publications (2)

Publication Number Publication Date
TW200541052A TW200541052A (en) 2005-12-16
TWI303098B true TWI303098B (en) 2008-11-11

Family

ID=35459687

Family Applications (1)

Application Number Title Priority Date Filing Date
TW093139348A TWI303098B (en) 2004-06-09 2004-12-17 Semiconductor device with low contact resistance and method for fabricating the same

Country Status (5)

Country Link
US (1) US7498218B2 (zh)
JP (1) JP2005354029A (zh)
KR (1) KR100603588B1 (zh)
CN (1) CN100435284C (zh)
TW (1) TWI303098B (zh)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100681208B1 (ko) 2004-12-29 2007-02-09 주식회사 하이닉스반도체 이중층 구조의 랜딩플러그콘택을 구비하는 반도체 소자 및그의 제조 방법
KR100637690B1 (ko) * 2005-04-25 2006-10-24 주식회사 하이닉스반도체 고상에피택시 방식을 이용한 반도체소자 및 그의 제조 방법
JP2008047720A (ja) * 2006-08-17 2008-02-28 Elpida Memory Inc 半導体装置の製造方法
JP2009200255A (ja) * 2008-02-21 2009-09-03 Toshiba Corp 半導体装置及びその製造方法
US8815710B2 (en) * 2008-06-10 2014-08-26 Sumco Corporation Silicon epitaxial wafer and method for production thereof
JP2011243960A (ja) * 2010-04-21 2011-12-01 Elpida Memory Inc 半導体装置及びその製造方法
JP6009237B2 (ja) * 2012-06-18 2016-10-19 Sumco Techxiv株式会社 エピタキシャルシリコンウェーハの製造方法、および、エピタキシャルシリコンウェーハ
JP5845143B2 (ja) 2012-06-29 2016-01-20 株式会社Sumco エピタキシャルシリコンウェーハの製造方法、および、エピタキシャルシリコンウェーハ
KR102269228B1 (ko) 2014-07-31 2021-06-25 삼성전자주식회사 반도체 장치의 제조 방법
US9330972B2 (en) * 2014-08-12 2016-05-03 Globalfoundries Inc. Methods of forming contact structures for semiconductor devices and the resulting devices
US9805973B2 (en) * 2015-10-30 2017-10-31 International Business Machines Corporation Dual silicide liner flow for enabling low contact resistance
US9685389B1 (en) * 2016-02-03 2017-06-20 Taiwan Semiconductor Manufacturing Co., Ltd. Formation of getter layer for memory device
KR20180076424A (ko) * 2016-12-27 2018-07-06 에스케이하이닉스 주식회사 반도체장치 및 그 제조 방법
JP2020043163A (ja) * 2018-09-07 2020-03-19 キオクシア株式会社 半導体装置
JP2020043162A (ja) 2018-09-07 2020-03-19 キオクシア株式会社 半導体装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4966868A (en) * 1988-05-16 1990-10-30 Intel Corporation Process for selective contact hole filling including a silicide plug
JPH0234930A (ja) 1988-07-25 1990-02-05 Matsushita Electron Corp 半導体装置の製造方法
JPH02125615A (ja) * 1988-11-04 1990-05-14 Nec Corp 半導体装置の形成方法
JPH0311737A (ja) * 1989-06-09 1991-01-21 Seiko Epson Corp 固相エピタキシャル
KR960004095B1 (en) 1993-02-17 1996-03-26 Hyundai Electronics Ind Manufacturing method of metal plug in contact-hole
JPH07130682A (ja) * 1993-11-02 1995-05-19 Nippon Steel Corp 半導体装置の製造方法
JP2877108B2 (ja) * 1996-12-04 1999-03-31 日本電気株式会社 半導体装置およびその製造方法
US6372566B1 (en) 1997-07-03 2002-04-16 Texas Instruments Incorporated Method of forming a silicide layer using metallic impurities and pre-amorphization
KR100559029B1 (ko) 1998-12-29 2006-06-16 주식회사 하이닉스반도체 반도체 소자의 메탈 콘택 형성 방법
JP2001148472A (ja) * 1999-09-07 2001-05-29 Nec Corp 半導体装置及びその製造方法
US6455424B1 (en) * 2000-08-07 2002-09-24 Micron Technology, Inc. Selective cap layers over recessed polysilicon plugs
JP2003188252A (ja) * 2001-12-13 2003-07-04 Toshiba Corp 半導体装置及びその製造方法
US6511905B1 (en) * 2002-01-04 2003-01-28 Promos Technologies Inc. Semiconductor device with Si-Ge layer-containing low resistance, tunable contact
KR100637690B1 (ko) * 2005-04-25 2006-10-24 주식회사 하이닉스반도체 고상에피택시 방식을 이용한 반도체소자 및 그의 제조 방법

Also Published As

Publication number Publication date
KR100603588B1 (ko) 2006-07-24
US20050275102A1 (en) 2005-12-15
KR20050117107A (ko) 2005-12-14
US7498218B2 (en) 2009-03-03
TW200541052A (en) 2005-12-16
JP2005354029A (ja) 2005-12-22
CN100435284C (zh) 2008-11-19
CN1707756A (zh) 2005-12-14

Similar Documents

Publication Publication Date Title
CN100435284C (zh) 具有低接触电阻的半导体设备及其制造方法
TWI261309B (en) Semiconductor device with epitaxial C49-titanium silicide (TiSi2) layer and method for fabricating the same
TWI255007B (en) Method of fabricating a semiconductor device having reduced contact resistance
US8741710B2 (en) Methods of fabricating semiconductor devices using a plasma process with non-silane gas including deuterium
JP4967313B2 (ja) 半導体装置の製造方法
JP4345875B2 (ja) 半導体素子のコンタクトプラグ形成方法
JP4748408B2 (ja) 半導体装置のメタルシリサイド層形成方法
KR20020003625A (ko) 금속 게이트 모스팻 소자의 제조방법
TW200425411A (en) Integrating n-type and p-type metal gate transistors
JP2006310717A (ja) 固相エピタキシー方式を用いた半導体素子及びその製造方法
TW200423400A (en) Schottky barrier transistor and method of manufacturing the same
KR100637101B1 (ko) 에피택셜 스택과 금속층의 이중 구조로 된 콘택플러그를구비하는 반도체소자 및 그의 제조 방법
TW200539323A (en) Polycrystalline SiGe junctions for advanced devices
TW200845157A (en) Stable silicide films and methods for making the same
US7407871B2 (en) Method for passivation of plasma etch defects in DRAM devices
TW201126576A (en) Plasma doping method and method for fabricating semiconductor device using the same
TWI732976B (zh) 形成矽化物的方法
JP2004128314A (ja) 半導体装置の製造方法
EP2562803B1 (fr) Procédé de réalisation d'un dispositif à transistors contraints à l'aide d'une couche externe, et dispositif
JP3923014B2 (ja) トレンチを備えたメモリーセルおよびその製造方法
JP2007158259A (ja) 半導体装置およびその製造方法
US20060286756A1 (en) Semiconductor process and method for reducing parasitic capacitance
JP4510707B2 (ja) エピタキシャル膜の形成方法と、これを用いた薄膜形成方法、及び半導体装置の製造方法
KR20070035362A (ko) 반도체 소자 및 그 제조방법
JPH1174507A (ja) 半導体装置の製造方法

Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees