TWI360197B - Method of fabricating an integrated circuit channe - Google Patents

Method of fabricating an integrated circuit channe Download PDF

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Publication number
TWI360197B
TWI360197B TW094100446A TW94100446A TWI360197B TW I360197 B TWI360197 B TW I360197B TW 094100446 A TW094100446 A TW 094100446A TW 94100446 A TW94100446 A TW 94100446A TW I360197 B TWI360197 B TW I360197B
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Taiwan
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layer
semiconductor layer
strained
providing
compound semiconductor
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TW094100446A
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TW200529367A (en
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Qi Xiang
James N Pan
Jung-Suk Goo
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Globalfoundries Us Inc
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    • 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/76Unipolar devices, e.g. field effect transistors
    • H01L29/772Field effect transistors
    • H01L29/78Field effect transistors with field effect produced by an insulated gate
    • H01L29/785Field effect transistors with field effect produced by an insulated gate having a channel with a horizontal current flow in a vertical sidewall of a semiconductor body, e.g. FinFET, MuGFET
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/66007Multistep manufacturing processes
    • H01L29/66075Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
    • H01L29/66227Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
    • H01L29/66409Unipolar field-effect transistors
    • H01L29/66477Unipolar field-effect transistors with an insulated gate, i.e. MISFET
    • H01L29/66787Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a gate at the side of the channel
    • H01L29/66795Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a gate at the side of the channel with a horizontal current flow in a vertical sidewall of a semiconductor body, e.g. FinFET, MuGFET
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/76Unipolar devices, e.g. field effect transistors
    • H01L29/772Field effect transistors
    • H01L29/78Field effect transistors with field effect produced by an insulated gate
    • H01L29/7842Field effect transistors with field effect produced by an insulated gate means for exerting mechanical stress on the crystal lattice of the channel region, e.g. using a flexible substrate

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thin Film Transistor (AREA)
  • Insulated Gate Type Field-Effect Transistor (AREA)
  • Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)

Description

1360197 子移動率,尤其是電洞型(h〇le_type)載子。譬如含有鍺之 石夕通道之張力應變料道區域(tensilcstrainedsiiic〇n channel region),由於減少了載子散射和由於減少了於含 鍺材料中電動之質量,而能具有較習知.Si通道區域大2 至5倍之載子移動率。依照用於整塊型式裝置之習知以 技術,摻雜物植入分子束磊晶(MBE)技術形成以一以 磊晶層。然而,MBE技術需要非常複雜和昂貴之裝備,而 不適宜用於大量生產1C。
譬如垂直雙閘極絕緣層上覆矽(s〇I)電晶體或FinFET 之雙閘極電晶體相關於高驅動電流和高度的免除短通道效 應而具有顯著之優點。 ,由黃(Huang)等人所提出之一篇論文,題目是“次5q 示米(nm)FinFET · PM0S (1 999年IEDM)討論矽電晶體,其 中主動層由二側之閘極所圍繞。然而,使用習知之ic製造 工具和技術可能很難製造雙閘極架構。再者,因為相關於 矽鰭之外形構造,則可能很困難圖案化。於小的關鍵尺寸, 也許不可能圖案化。 舉例來說,鰭架構能位於矽二極體層之上,由此達成 SOI架構。已發現習知之FinFETs〇i裝置經由使用半導體 土 :反木構升〉成裝置而具有許多之優點’包括裝置之間較佳 之絕緣、減少漏電流、減少CM0S元件之間之鎖住 γ a^tch up)、減少晶片電容、以及減少或消除源極和汲極 區域之間軚接之短通道。雖然習知之F丨nFET s〇!裝置由於 SOI木構,比在整塊半導體基板上形成之丁而具有優 92752 6 ljouiy/ 點’但是FinFET之一此其太扣w 故 其他一那些基:;性:同移:係與 /及極和通這區域一般係由習知之整3|Μπςρρτ i # (例如,石夕)製成。 之1塊_阳半導體材料 ^祕如裝置之韓架構能夠位於數個 ::個不同層包括光阻層、底部抗反射二 矽層。以此種配置模式會存在 户日日 於整個.鳍年構。B夕 7光阻層也許要薄 $沾-…、 夕晶矽層也許於該鰭架構之邊緣非 *的涛。BARC也許於該韓架構之邊緣报厚 對於BARC層和多晶矽層需要 年-置導致 電晶體之尺寸。 ㈣度_。此等需求增加 當製造FinFET結構時,希望具有 加1〇)之鰭通道架構。對於歸通道架構之較、縱=Ct ==量之電流,流經相同數量之今允 、、寸衣造’尚不可實施製造高縱橫比FinFET。 古Ϊ要—種積體電路或電子裝置,其包括具有較 流之通道區域。再者,,要以及較南驅動電 FinFET梦罢夕士 圖案化具有小關鍵尺寸之 制…: 更再者,需要-種用WinFET裝置. 製造應變衝通道之方法。又再者 二: 之FinFET裝置。又且去+ 要種同縱秘比 有效方法。又再者,一種製造高縱橫比轉結構之 域之Fi m驻罢、要一種具有應變半導體鰭狀通道區 諸狀1替之!^°又再者’需要一種製造具有應變半導體 ,.,、曰狀通道之FinFE丁裝置之製程。 92752 7 1360197 【發明内容】 — 一個實施範例係關於一種形成鰭狀通道區域之方法。 :該方法包括在絕緣層上設化合物半導體層,並在化合物半 .導站·層中設溝渠。.本方法亦包括在化合物半導體層之上和 屢7K之内设應變半導體層。該溝渠係關聯於韓狀通道區 域。該方法復包括從化合物半導體層之上去除應變半導體 層,並去除化合物半導體層而留下應變半導體層,形成鰭 _狀通道區域。當去除該應變半導體層時,該應變半導體声 留在溝渠内。 曰 另一個實施範例係關於FinFET通道結構形成方法。該 方法包括在基板之上之絕緣層之上設第一層,並於該第— 層中設開口(aperture)。該第一層包括石夕和錯而該開口延 伸至絕緣層。該方法亦包括提供應變材料於開口内,並去 除該第一層而留下應變材料。 又另一個實施範例係關於製造包括以鰭為基礎之電晶 鲁體之積體電路之方法。該方法句枯 乃无4万次包栝下列步驟:提供絕緣材 枓;在該絕緣材料之上設置應變引起層;以及在該應變引 起層中設開口。該方法復包括下列步驟:藉由選擇蟲晶生 j而形成應變材料於該開口中;去除該應變引起層之至少 一部分’由此留下該應變材料作為韓結構;以及二二 該鰭結構之閘極結構。 ' 【實施方式】 弟1圖為描繪圖案 —‘·一,"土、叹屯阳镀或場效電 mFET)之方法或製程1()之範例操作之流程圖。該流 92752 8 1360197 以例不之方式顯示一些可以施行之操作。可使用附加之操 作、較少之操作、或各操作之組合於各種不同之實施例中。 机私圖110 (第12圖)顯示於選用(替代)之實施例,其中於 蝕刻期間使用遮罩步驟以保護源極和汲極位置。流程圖 21 〇(第15圖)顯示另一選用(替代)之實施例,其中使用間 隔件以增加該鰭結構之縱橫比。
於第1圖中,於步驟15設有於絕源層之上包含有化合 物半導體層之晶圓。該晶圓可購得或使用SIM〇x(氧植入矽 中以及退火或晶圓黏結)而製得。於步驟25 ’圖案化化合 物半導體層以形成通道溝渠。於步驟45,半導體層形成於 化合物半導體層之上和溝渠之中。於化合物半導體層中之 溝渠最好是具有底部,該底部柢達絕源層之上表面。 於製程1 0之步驟5 5,半 - ,'6'柳千等體肩二 上平面化,由此而從該化合物半導體層之上表面去除該 導體層,並將該半導體層留於溝渠中。於步驟65,去°除 合物半導體由此留下絲狀通道結構或區域於該絕源 之上。於步驟75,設置閘極結構完成以鰭 ,第2至4圖,使用製程1。以形成包含有 礎電晶體或FinFET之積體電路_之部分,該部分於第 :1卜13、14和16至17圖中未按照實際比例繪示。繪 J 3和4圖以顯示關聯於縛狀通道區域152之高縱橫比 :二:其,之圖式為了方便繪示之效果’並未繪出強調 心比。應值得注意的是,第1JL1Q圖提供以示音方式 不該等圖式,而並不是成比例之工程繪圖。於第2圖中 92752 9 1360197 =㈣如厚度),和約5nm至2〇·之間寬度1寬 度士、由攻小轉變閘極長度⑹ni_ transiti〇ngate =巧_/2閉極長度)所決定。於-個實施例中, 縱檢比疋在約4至6之間。相關於區域152之高縱橫比, 經過相對小之區域設有高電流電晶體。八 或制’㊆狀通道區域152是依照製程1G、製程110、 二:造之張力應彻材料。導體166能夠具有 I:: °°埃之間之厚度,而閉極電介質層16〇 月b夠具有約1〇埃至 圖中顯示了通道區域152,作是、^^。雖餘第2至4 有各種不同型式之閘.極社構=域152此夠使用具 並未以限定之方式顯:極導體166和電介質層160 之太Π情況是’從源極區域22之末端纽極區域Μ Γ而=第2圖中上端至底端)為〇.5至1微米之 之左邊至右邊及24之寬度(從第2圖中通道區域152 -極_包括應變之二:之區域22與 半蓐雕料4···丨 早、、·口日日材料、或化合物 152^门^。於一個實施例中,區域22與24係用與區域 =之材料製成。區域_最好是摻雜Η型或p =勿達每立方公分10,4至1〇2°濃度(I。14至I。2。時 最好。域⑽設在絕緣層13G之上。絕緣層130 如"礼化物結構(buried oxide structure),,嬖 埃二7層。於一個實施例中,層13◦具有約測 刪*之間之厚度。層130㈣設在任㈣式之基板 92752 1】 1360197 圖之剖面圖顯示如第4至9圖之相同配置。 應瞭解到雖然所給予之詳細圖式、特定範例、材料型 式厚度、尺寸、和特定值提供了本發明之較佳實施範例, 但是該較佳實施範例僅是為了說明之目的。本發明之方法 和裝置並不限於所揭示之精確詳細說明和狀況。對於所揭 =之詳細說明能夠作各種改變而不會偏離由下列申請專利 範圍所界定之本發明之範圍。 【圖式簡單說明】 。上文中將參照所附圖式而說明實施範例,各圖中相同 之號碼係表示相同之元件,以及:· 、第1圖為描繪於一製程之範例操作之流程圖,用來形 成依照實施範例用於積體電路之以鰭為基礎之電晶體;/ 第2圖為根據實施範例依照第i圖 :;迻
積體電路之部分之一般示意平面上視圖圖形;U ♦二為根據實施範例沿著第2圖中剖線3-3所示積 籲祖电路。P分之示意剖面圖圖形; 二圖為根據實施範例沿著第2圖中剖線“所示積 肢包路刀之不意剖面圖圖形; 圖妒第:圖Γ3圖中所示積體電路之部分之示意剖面圖 圖用於第1圖中製程之於基板之上之絕緣層; μ,部:第5圖中所示積體電路之部分之示意剖面圖 圖W顯不化合物半導體沉積操作; 口 圖形,邱圖=第6圖中所不積體電路之部分之示意剖面圖 圖开…員不溝渠形成操作;. 圃 92752 ]7 1360197 第8圖為第7圖中所示積體電路 圖形,顯示磊晶生長操作; 部分之示意剖面圖 第9圖為第8圖中所示積體電路 一 圖形,顯示化學機械研磨操作; 。卩分之示意剖面圖 第10圖為第9圖中所示積體電踗 圖形,顯示選擇之蝕刻操作; 之#分之示意剖面圖 第圖為第5圖中所示積體電 _ 圖形,顯示閘極氧化物形成操作;之B之示思剖面圖 第1 2圖為描繪於另一製程之 形成依照實施範例用於積體電:::作之流程圖,用來 第-圖為根據另一實施範:依 製造之積體電路之部分之-般示音平面所示製程 笛! d n a w十面上視圖厨形; 圖為根據實施範例沿著第丨 示r電路之部分之示意剖面圖圖二 示製程之遮罩操作; 貝丁弟12圖中所. 第15圖為描繪於又另—萝 ^ ^ ^ ^ ^ 衣私之乾例钿作之流程圖,用 Μ成依照實施範例用於積體電路之以.鰭為基礎之二 體, 兒日日 :16圖為根據第15圖中所示製程製造之積體電路之 。 意剖面圖圖形’顯示間隔件材料供應操作;以及 第Π圖為第16圖中所示之部分之示意剖面 不間隔件材料去除操作以留間隔件於開口中。 』 【主要元件符號說明】 剖線 4-4 剖線
1S 92752 1360197 10 方法(製程) 14-14 剖線 15、 25 ' 45 、 55 、 65 、 75 步驟 22 源極區域 24 >及極區域 32、 34 邊界 100 積體電路 110 、120 製程(流程圖) 130 絕緣層 134 遮罩 140、 144 、 150 、 151 層 142 開口或溝渠 143 上平面 152 鰭狀通道區域(通道區域) 153 上表面 160 閘極電介質層 163 橫向側 165 步驟 166 閘極導體 167 上表面 210 製程(流程圖) 225、 227步驟
19 92752

Claims (1)

1360197 十、申請專利範圍
第94100446號專利申請案 1〇1年1月6日修正替換頁 1. 一種形成籍狀通道區域(152)之方法,該方法包括:
在絕緣層(130)上設化合物半導體層(14〇); 在該化合物半導體層(140)中設溝渠(142); 在該化合物半導體層(140)之上和該溝渠(丨42)之 内設應變半導體層(144)’該溝渠(142)係關聯於該鰭狀 通道區域(152); 從該化合物半導體層(140)之上去除該應變半導體 層(144) ’由此留該應變半導體層(144)在該溝渠(142) 之内;以及 去除該化合物半導體層(14〇),留下該應變半導體 層(144),並形成該鰭狀通道區域(152)。 2. 如申請專利範圍第1項之方法,復包括:在鄰近該鰭狀 通道區域(152)之橫向側壁處設氧化物材料(160),並在 該氧化物材料(160)之上設閘極導體(166)。 3. 如申請專利範圍第1項之方法,其中,該鰭狀通道區域 (152)包括矽,而該化合物半導體層(140)為矽鍺層。 4. 如申請專利範圍第1項之方法,其中,該第二去除步驟 係利用遮罩(134)’該遮罩(134)保護用為源極區域(22) 和汲極區域(24)之該化合物半導體層(140)之部分。 5. —種FinFET通道結構形成之方法,該方法包括: 在基板之上之絕緣層(130)之上設第一層(140),該 第一層(140)包括石夕和錯; 於該第一層(140)中設開口(142),該開口(142)延 20 (修正本)92752 1360197 ? 第94100446號專利申請索 101年1月6日修正替換頁 伸至該絕緣層(130); ' 提供應變材料(144)於該開口(142)内;以及 … 去除該第一層(140)而留下該應變材料(144)。 6·如申明專利範圍第5項之方法,復包括沿著該應變材料 (144)之侧壁和頂面形成閘極電介質層(16〇)。 7. 如申請專利範圍第6項之方法,其中,該應變材料(144) 藉由選擇性磊晶而設於該第一層(140)之上。 8. —種製造積體電路之方法’該積體電路包括以鰭為基礎 之電晶體,該方法包括下列步驟: 提供絕緣材料(130); , 在該絕緣材料(130)之上設應變引起層(14〇); 在該應變引起層(14〇)中設開口(丨42); 藉由選擇磊晶生長而形成應變材料(144)於該開口 (142)中; ' 〇 去除該應變引起層(140)之至少一部分,由此留下 該應變材料作為鰭結構(152);以及 設置用於該鰭結構(152)之閘極結構(166)。 9. 如申請專利範圍第8項之方法,其中,該開口(142)係 介於約20至120 nm之間之寬度。 如申請專利範圍第5或8項之方法,其中,該去除步驟 為選擇用於石夕鍺之姓刻步驟。 (修正本)92752 21
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