TWI297212B - Tri-gate transistors and methods to fabricate same - Google Patents
Tri-gate transistors and methods to fabricate same Download PDFInfo
- Publication number
- TWI297212B TWI297212B TW094101018A TW94101018A TWI297212B TW I297212 B TWI297212 B TW I297212B TW 094101018 A TW094101018 A TW 094101018A TW 94101018 A TW94101018 A TW 94101018A TW I297212 B TWI297212 B TW I297212B
- Authority
- TW
- Taiwan
- Prior art keywords
- semiconductor
- layer
- oxide layer
- trenches
- semiconductor material
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 56
- 239000004065 semiconductor Substances 0.000 claims description 57
- 239000000463 material Substances 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 26
- 150000004767 nitrides Chemical class 0.000 claims description 20
- 229910052732 germanium Inorganic materials 0.000 claims description 11
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000000151 deposition Methods 0.000 claims description 8
- 230000008021 deposition Effects 0.000 claims description 8
- 238000005530 etching Methods 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 3
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000001039 wet etching Methods 0.000 claims 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims 1
- 238000000059 patterning Methods 0.000 claims 1
- 229910052707 ruthenium Inorganic materials 0.000 claims 1
- 229910001925 ruthenium oxide Inorganic materials 0.000 claims 1
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 claims 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims 1
- 238000012546 transfer Methods 0.000 description 11
- 239000010408 film Substances 0.000 description 7
- 239000012212 insulator Substances 0.000 description 7
- 229920002120 photoresistant polymer Polymers 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 229910000449 hafnium oxide Inorganic materials 0.000 description 2
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- -1 hafnium nitride Chemical class 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types 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
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/785—Field 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep 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
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66787—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a gate at the side of the channel
- H01L29/66795—Unipolar 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
Description
1297212 (1) 九、發明說明 ^ 【發明所屬之技術領域】 • 本發明之實施例係大致有關積體電路裝置製造之領域 ,尤係有關三閘極電晶體的製造。 【先前技術】 增加積體電路裝置(1C裝置)的數目及功能之趨勢 -φ 仍持續著。當電晶體的尺寸縮小時,現有電晶體製程的嚴 重缺點變得明顯。例如,製造典型的絕緣層上覆矽( Silicon On Insulator;簡稱SOI)電晶體時,係以一絕緣 體(例如,玻璃或氧化矽))層覆蓋一基材,然後將一第 二矽晶圓接合到該絕緣體層,並將該第二矽晶圓削薄到一 所需的厚度(亦即,由電晶體尺寸所決定的厚度)。很難 在高精確度下控制該削薄製程。 圖1A-1D示出根據先前技術而製作一個三閘極SOI φ 電晶體的製程之一部分。如圖1 A所示,通常爲一矽基材 的一載體晶圓(101)具有被配置在該載體晶圓上且通常 爲二氧化矽之一絕緣體層(1 02 )。 例如,可在一砂基材上生長一個二氧化砂層。 如圖1 B所示,然後將有助於接合的一轉移晶圓(1 0 3 )接合到絕緣體層(1 02 )。可利用熱誘導氫鍵鍵結製程 完成將該載體晶圓接合到該絕緣體層。可以是諸如矽的該 轉移晶圓之厚度大約爲600微米。 然後根據電晶體的尺寸而將該轉移晶圓削薄到所需厚 -5- (2) 1297212 度。該厚度通常大約是50-100奈米。可利用數種典型製 程中之一種製程完成該轉移晶圓的削薄。例如,可將一溼 • 式蝕刻及硏磨製程用來將該轉移晶圓硏磨到該所需厚度。 將該轉移晶圓削薄的一替代性方法包括對該轉移晶圓層進 行氫植入,以便產生該轉移晶圓的一較薄部分。然後將該 被接合的對加熱,以便完成該氫摻雜界面的一高溫斷裂( high temperature cleave)。然後硏磨該轉移晶圓表面,或 • 以其他方式處理該轉移晶圓表面,以便將該表面平坦化, 或進一步減少厚度。這些方法提供了將該厚度控制在大約 數百埃之內。如圖ic所示,已在該電晶體的矽本體中將 轉移晶圓(1 03 )削薄到一所需只寸,而形成薄膜層(1 〇4 )。係由矽本體的所需高度(HSi )決定薄膜層(104 )的 厚度。然後選擇性地蝕刻薄膜層(1 0 4 ),以便產生電晶 體的矽本體。如圖1 D所示,利用微影技術選擇性地蝕刻 薄膜層(104 )時,將形成具有一所需本體寬度(Esi )及 • 本體高度(HSi)之矽本體(105)。 k寸於典型的電晶體設S十架構而言,鬧極長度係與H s i 成正比,且Hsi %於閘極長度的大約二分之一*。對於闊極 長度大約爲20- 1 00奈米的典型電晶體而言,所需Hsi大於 大約2 0奈米。使用現有的製造方法時,可製作出適當的 薄膜層。然而,當閘極長度減少,且因而使所需H s i減少 時,現有的製造方法將顯現嚴重的缺點。 一晶圓上的H s i値必須是一致的,以便產生具有一致 的特性之電晶體。例如,與HSi成正比的電晶體臨界電壓 -6- (3) 1297212 之變化不應超過大約10%。因此,決定Hsi的薄膜層厚度 ‘ 之變化不應超過10%。 • 將轉移層削薄以便得到薄膜層的方法可產生厚度大約 爲20奈米且厚度之變化不超過大約1〇%之一薄膜層。然 而,然而,這些方法無法產生較薄的薄膜層之所需一致性 。因此,製造SOI電晶體的現有方法無法產生閘極長度小 於大約5 0奈米之電晶體。此外,接合載體晶圓及轉移晶 圓的製程以及將轉移晶圓削薄到所需厚度的製程都是高成 本且難以控制的。 【發明內容】 本發明之實施例提供了一種在絕緣層上覆矽型電晶體 製造中完成一致的矽本體高度之方法。在一實施例中,在 一半導體基材之上配置一犧牲氧化物層。蝕刻該氧化物層 ,以便形成一溝槽。然後以一半導體材料塡滿該溝槽。然 Φ 後將該半導體材料平坦化至該氧化物層的其餘部分,然後 去除該氧化物層的其餘部分。因而露出的半導體鰭片具有 在一指定公差內之一致性高度。 【實施方式】 在下文的說明中,述及了許多特定的細節。然而,我 們當了解,可在無須這些特定細節的情形下實施本發明的 實施例。在其他的情形中,並未詳細示出一些習知的電路 、結構、及技術,以免模糊了對該說明的了解。 -7- (4) 1297212 在整份說明書中,提到“一個實施例”或“ 一實施例”時 、,意指參照該實施例所述的一特定的特徵、結構、或特性 -被包含在本發明的至少一個實施例中。因此,在整份說明 書的各部分出現“在一個實施例中,,或“在一實施例中”的詞 語時,並不必然都參照到相同的實施例。此外,可在一個 或多個實施例中以任何適當的方式結合該等特定的特徵、 結構、或特性。 | 此外,本發明的各觀點係小於所揭示的單一實施例之 所有特徵。因此,在實施方式之後申請專利範圍因而被明 確地包含在該實施方式中,其中每一申請專利範圍係以作 爲本發明之一各別的實施例之方式而獨立地呈現。 圖2示出根據本發明的一實施例而使矽本體高度Hsi 具有更佳的一致性之一製程。圖2所示之程序(200 )開 始於作業(205 ),其中在一基材層之上配置一溝槽層。 在一實施例中,可使用一化學汽相沈積(Chemical Vapor φ Deposition ;簡稱C V D )製程而在該基材層之上配置該溝 槽層。在一實施例中,該基材層是矽。在替代實施例中, 該基材層可以是諸如鍺(Ge )或砷化鎵(GaAs )等的另 一種半導體材料。在一實施例中,係根據該電晶體的閘極 長度之規格而決定溝槽層的厚度。亦即,係將溝槽層的厚 度選擇成等於一 Hsi値。 在作業(2 1 0 )中,去除該溝槽層的一些所選擇之部 分,因而形成若干溝槽。在一實施例中,該溝槽層是一種 可利用傳統的蝕刻製程而選擇性地蝕刻的材料。在各替代 -8- (5) 1297212 實施例中,該溝槽層可以是每一層具有不同材料的多層。 k 在該實施例中,該溝槽層的該等多層易受不同的蝕刻製程 ~ 之影響。 在作業(2 1 5 )中,以一半導體材料(例如矽)塡滿 在作業(2 1 0 )中形成的該等溝槽。在一實施例中,係利 用一選擇性磊晶製程而以磊晶矽塡滿該等溝槽。在一替代 實施例中,係以某一其他的方式塡滿該等溝槽。例如,可 • 利用一毯覆式沈積(blanket deposition)製程而以多晶砂 塡滿該等溝槽。 在作業(220 )中,去除過量的半導體材料。亦即, 去除用除用來塡滿溝槽的半導體材料中延伸到該溝槽層的 其餘部分的表面之上的半導體材料。在一實施例中,採用 化學機械硏磨(Chemical Mechanical Polishing ;簡稱 CMP )將半導體材料的表面平坦化。 在作業(225 )中,去除該溝槽層的其餘部分,而露 Φ 出半導體鰭片(亦即,塡滿該等溝槽的半導體材料)。在 一實施例中,該等半導體鰭片的高度之一致性爲具有小於 5 %的變化。 圖3 A-3G示出根據本發明的一實施例的一個三閘極電 晶體之製造。圖3A示出一砂基材(301)。在砂基材( 3 〇 1 )上配置一多層溝槽層。係由一第一氧化物(例如, 二氧化矽)層(302 )、一氮化物(例如,氮化矽)層( 3 0 3 )、及一第二氧化物(例如,二氧化矽)層(3 0 4 )構 成該溝槽層。最後,將由易於控制的該第二氧化物層之厚 -9- (6) 1297212 度決定該三閘極本體的厚度。 '圖3B示出施加一光阻罩幕層(3 0 5 )以界定該等電晶 β 體本體。光阻罩幕層(3 0 5 )決定了矽本體的寬度Wsi。 圖3C示出蝕刻該溝槽層以界定溝槽(3 06a )及( 3 06b)。在一實施例中,採用一系列的三種不同之乾式飩 刻製程。在該實施例中,使用一選擇性乾式蝕刻製程蝕刻 第二氧化物層(3 04 ),在該製程中,係將氮化物層(303 ·)用來作爲一鈾刻終止層。然後使用一不同的選擇性乾式 蝕刻製程蝕刻氮化物層(3 03 ),在該製程中,係將第一 氧化物層(3 02 )用來作爲一蝕刻終止層。最後,使用足 以選擇性地終止在矽基材(3 0 1 )的表面之一乾式蝕刻製 程來蝕刻第一氧化物層(3 02 )。 圖3D示出在剝除光阻層(3 05 )之後以矽(3 07 )塡 滿溝槽(3 06a )及(3 06b )。如前文所述,可利用其中包 括磊晶生長或多晶矽的毯覆式沈積的各種替代性方法而以 # 矽塡滿該等溝槽。 圖3 E示出將矽(3 0 7 )平坦化到第二氧化物層(3 0 4 )的高度。在一實施例中,係利用一 CMP製程完成該平 坦化。在一實施例中,係將硏磨製程用來去除第二氧化物 層(3 04 ),且係將氮化物層(3 03 )用來作爲一硏磨終止 層。在該實施例中,該硏磨對氧化物及氮化物具有高選擇 性。在一替代實施例中,係將第二氧化物層(3 04 )選擇 性地蝕刻到氮化物層(3 0 3 )。然後利用諸如磷酸等的一 溼式蝕刻製程蝕刻氮化物層(3 03 )在該製程中,係將第 -10- (7) 1297212 一氧化物層(3 02 )用來作爲一蝕刻終止層。 圖3 F示出在去除該溝槽層(例如,第二氧化物層( 3 04 )及氮化物層(3 03 ))之後露出的該三閘極電晶體之 矽本體。如圖3 F所示,可保留該溝槽層的一部分(例如 ,第一氧化物層(3 02 )),以便實現該電晶體的有利特 性,且將於下文中說明其中情形。形成閘極體的矽(3 07 )具有在一指定公差之內的一致性高度。在一實施例中, 圖3 G示出以形成一圍繞矽(3 0 7 )的閘極(3 0 8 )而 製造出之三閘極電晶體。閘極(3 0 8 )可以是諸如金屬或 此項技術中習知的另一種適當材料。 一般事項 本發明的實施例包含各種作業。於說明許多該等方法 時,係以該等方法的最基本形式進行說明,但是可在在不 脫離本發明基本範圍下,將一些作業增添到任何該等方法 ,或自任何該等方法中刪除一些作業。例如,在各替代實 施例中,可在基材上配置圖2的作業(2 0 5 )中所述之溝 槽層,且可如圖3 A所示而以多層構成該溝槽層。此外, 可保留該溝槽層的一部分,以便實現有利的特性。如圖 3F及3G所示,保留了該第一氧化物層的一部分,以便減 少電晶體中之邊界效應電容値(fringe capacitance)。 如前文所述,可以其中包括諸如多晶矽的毯覆式沈積 之一些方式儿以砂塡滿溝槽層中形成的溝槽。在使用多晶 矽的毯覆式沈積之一實施例中,在沈積之後,採用一退火 -11 - (8) 1297212 製程,以便將該矽退火成一單晶。 '雖然已參照數個實施例而說明了本發明,但是熟習此 -項技術者當可了解,本發明並不限於所述之實施例,而是 可在最後的申請專利範圍之精神及範圍下,以修改及改變 來實施本發明。因而應將本說明視爲舉例性而非限制性。 【圖式簡單說明】 U 可參照前文的說明及用來例示本發明的實施例之各附 圖,而對本發明有最佳的了解。該等圖式中: 圖1A-1D示出根據先前技術而製作一個三閘極S0I 電晶體的製程; 圖2示出根據本發明的一實施例而使矽本體高度Hsi 具有更佳的一致性之一製程;以及 圖3 A - 3 G不出根據本發明的一貫施例的一個二聞極電 晶體之製造。 【主要元件之符號說明】 1 〇 1 :載體晶圓 102 :絕緣體層 103 :轉移晶圓 104 :薄膜層 105 :矽本體 3 0 1 :矽基材 3 0 2 :第一氧化物層 -12- 1297212 Ο) 3 Ο 3 :氮化物層 3 04 :第二氧化物層 3 0 5 :光阻罩幕層 3 06a,3 06b :溝槽 3 07 :石夕 3 0 8 :鬧極
Claims (1)
1297212 十、申請專利範圍 - 附件2A: 第94101018號專利申請案 - 中文申請專利範圍替換本 民國96年10月26曰修正 1.一種半導體裝置製造方法,包含下列步驟: 在一半導體基材之上配置一溝槽層; 選擇性地去除該溝槽層的一部分,使該溝槽層的其餘 ® 部分形成一個或多個溝槽,而去除該溝槽層的該一部分將 露出該半導體基材; 在該等一個或多個溝槽內以磊晶方式生長一半導體材 料,以塡滿該等一個或多個溝槽; •自該等一個或多個溝槽去除任何過量的半導體材料; 以及 去除該溝槽層的一額外部分,以便露出被用來作爲一 個或多個半導體鰭片的該半導體材料。 % 2 ·如申請專利範圍第1項之方法,其中係由複數層構 成該溝槽層。 3·如申請專利範圍第2項之方法,其中該複數層包含 被配置在該半導體基材之上的一第一氧化物層、被配置在 該第一氧化物層之上的一氮化物層、以及被配置在該氮化 物層之上的一第二氧化物層。 4 ·如申請專利範圍第3項之方法,其中去除該溝槽層 的一額外部分之該步驟包含下列步驟:去除該第二氧化物 層的任何其餘部分及該氮化物層的任何其餘部分,並保留 1297212 該第一氧化物層之至少某一部分。 5.如申請專利範圍第1項之方法,其中該等一個或多 個溝槽具有大約1 0奈米的一深度。 6·如申請專利範圍第5項之方法,其中該等一個或多 個半導體鰭片具有一致性在5 %的公差之內的大約1 〇奈米 之一高度。 7.如申請專利範圍第1項之方法,其中自該等一個或 β 多個溝槽去除任何過量的半導體材料之該步驟包含下列步 驟:將該半導體材料平坦化至該溝槽層的一表面。 8·如申請專利範圍第7項之方法,其中係利用一化學 機械硏磨製程完成該平坦化,其係於去除該溝槽層的一額 外部分以便露出該半導體材料之前實行。 9·如申請專利範圍第1項之方法,其中以一半導體材 料塡滿該等一個或多個溝槽之該步驟包含下列步驟:執行 該半導體材料的一毯覆式沈積。
10· 一種積體電路裝置,包含: 一基材;以及 在該基材之上形成的一個或多個多閘極電晶體,每一 多閘極電晶體具有一半導體本體,其厚度係自該半導體本 體之機械平坦化頂表面至該基材測量所得,每一半導體本 體具有小於20奈米的一高度,每一半導體本體的該高度 係一致到在一指定高度的5%公差之內,且每一半導體本 體係相鄰於該基材上之一氧化物層,該氧化物層具有一沈 積厚度’其相等於該半導體本體厚度減去該半導體本體高 -2- 1297212 度。 1 1 ·如申請專利範圍第1 〇項之積體電路裝置,其中每 一半導體本體包含一磊晶半導體,其實質上具有與該基材 相同之晶體方向,該半導體本體係從該基材生長。 12.如申請專利範圍第11項之積體電路裝置,其中每 一半導體本體厚度係一致到大於該半導體高度公差之公差 之內。
13.—種半導體裝置製造方法,包含下列步驟: 在一半導體基材上配置一第一氧化物層; 在該第一氧化物層之上配置一氮化物層; 在該氮化物層之上配置一第二氧化物層; 選擇性地蝕刻該第一氧化物層、該第二氧化物層及該 氮化物層的一部分,以便界定露出該半導體基材之一個或 多個溝槽; 以一半導體材料塡滿該等一個或多個溝槽; 自該等一個或多個溝槽去除過量的半導體材料; 選擇性地從該氮化物層蝕刻該第二氧化物層的其餘部 分; 選擇性地蝕刻該氮化物層,以便形成一個或多個半導 體本體,該半導體本體高度係小於該第一氧化物層厚度加 上該氮化物層厚度加上該第二氧化物層厚度之總厚度;以 及 在該等一個或多個半導體本體之側壁上及在該第一氧 化物層上形成閘極本體。 -3- 1297212 1 4 ·如申請專利範圍第1 3項之方法,其中該等一個或 多個溝槽具有大約1 0奈米的一深度。 1 5 ·如申請專利範圍第1 3項之方法,其中該等一個或 多個半導體本體具有一致性在5%的公差之內的小於20奈 米之一高度。 1 6 ·如申請專利範圍第1 5項之方法,其中該等一個或 多個半導體本體具有大約10奈米之一高度。
1 7 ·如申請專利範圍第1 3項之方法,其中自該等一個 或多個溝槽去除任何過量的半導體材料之該步驟包含下列 步驟:將該半導體材料平坦化至該氮化物層的一表面。 1 8 ·如申請專利範圍第1 7項之方法,其中選擇性地蝕 刻該氮化物層進一步包含一溼式蝕刻製程,該溼式蝕刻製 程係終止於該第一氧化物層上。 19·如申請專利範圍第13項之方法,其中以一半導體 材' 料塡滿該等一個或多個溝槽之該步驟包含下列步驟:在 該等一個或多個溝槽內以磊晶方式生長該半導體材料。 20·如申請專利範圍第13項之方法,其中以一半導體 材*料塡滿該等一個或多個溝槽之該步驟包含下列步驟:執 行該半導體材料的一毯覆式沈積。 2 1 .如申請專利範圍第1 3項之方法,其中係由自包含 砂、鍺、及砷化鎵的一組材料中選出的一半導體材料構成 該半導體基材。 22·如申請專利範圍第13項之方法,其中係由矽構成 該半導體基材,係由二氧化矽構成該第一氧化物層,係由 -4- • 1297212 氮化矽構成該氮化物層,且係由二氧化矽構成該第二氧化 物層。
-5-
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-
2004
- 2004-01-16 US US10/760,028 patent/US7268058B2/en not_active Expired - Lifetime
-
2005
- 2005-01-10 WO PCT/US2005/000947 patent/WO2005071730A1/en active Application Filing
- 2005-01-10 CN CNB2005800072795A patent/CN100550324C/zh not_active Expired - Fee Related
- 2005-01-10 JP JP2006549560A patent/JP2007521667A/ja active Pending
- 2005-01-10 EP EP05711376A patent/EP1704590A1/en not_active Withdrawn
- 2005-01-13 TW TW094101018A patent/TWI297212B/zh not_active IP Right Cessation
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2007
- 2007-07-25 US US11/828,290 patent/US20070262389A1/en not_active Abandoned
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US20070262389A1 (en) | 2007-11-15 |
WO2005071730A1 (en) | 2005-08-04 |
JP2007521667A (ja) | 2007-08-02 |
EP1704590A1 (en) | 2006-09-27 |
TW200535933A (en) | 2005-11-01 |
CN100550324C (zh) | 2009-10-14 |
US20050158970A1 (en) | 2005-07-21 |
CN1930671A (zh) | 2007-03-14 |
US7268058B2 (en) | 2007-09-11 |
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