TWI236707B - Manufacturing method of semiconductor substrate - Google Patents
Manufacturing method of semiconductor substrate Download PDFInfo
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- TWI236707B TWI236707B TW092112145A TW92112145A TWI236707B TW I236707 B TWI236707 B TW I236707B TW 092112145 A TW092112145 A TW 092112145A TW 92112145 A TW92112145 A TW 92112145A TW I236707 B TWI236707 B TW I236707B
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- 239000000758 substrate Substances 0.000 title claims abstract description 71
- 239000004065 semiconductor Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims abstract description 48
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 30
- 239000010703 silicon Substances 0.000 claims abstract description 28
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 150000002500 ions Chemical class 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 50
- 239000001257 hydrogen Substances 0.000 claims description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims description 16
- -1 silicon ion Chemical class 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000002513 implantation Methods 0.000 claims description 5
- 238000005468 ion implantation Methods 0.000 claims 10
- 239000011261 inert gas Substances 0.000 claims 4
- 229910052799 carbon Inorganic materials 0.000 claims 3
- 229910052732 germanium Inorganic materials 0.000 claims 3
- 150000002431 hydrogen Chemical class 0.000 claims 3
- 230000001133 acceleration Effects 0.000 claims 2
- 125000004429 atom Chemical group 0.000 claims 2
- 229910052785 arsenic Inorganic materials 0.000 claims 1
- HAYXDMNJJFVXCI-UHFFFAOYSA-N arsenic(5+) Chemical compound [As+5] HAYXDMNJJFVXCI-UHFFFAOYSA-N 0.000 claims 1
- 229910021478 group 5 element Inorganic materials 0.000 claims 1
- 239000001307 helium Substances 0.000 claims 1
- 229910052734 helium Inorganic materials 0.000 claims 1
- 229910052754 neon Inorganic materials 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 2
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 10
- 238000003475 lamination Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000001771 vacuum deposition 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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
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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
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
- H01L21/76243—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology using silicon implanted buried insulating layers, e.g. oxide layers, i.e. SIMOX techniques
-
- 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
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
- H01L21/76264—SOI together with lateral isolation, e.g. using local oxidation of silicon, or dielectric or polycristalline material refilled trench or air gap isolation regions, e.g. completely isolated semiconductor islands
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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
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
- H01L21/76264—SOI together with lateral isolation, e.g. using local oxidation of silicon, or dielectric or polycristalline material refilled trench or air gap isolation regions, e.g. completely isolated semiconductor islands
- H01L21/76267—Vertical isolation by silicon implanted buried insulating layers, e.g. oxide layers, i.e. SIMOX techniques
-
- 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
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
- H01L21/76264—SOI together with lateral isolation, e.g. using local oxidation of silicon, or dielectric or polycristalline material refilled trench or air gap isolation regions, e.g. completely isolated semiconductor islands
- H01L21/76283—Lateral isolation by refilling of trenches with dielectric material
Description
1236707 (1) 玖、發明說明 【發明所屬之技術領域】 本發明係有關於一種半導體基板之製造方法。更詳細 而言,本發明係在使用矽基板之變形矽中,關於用以獲得 高品質的基板之有效的半導體基板之製造方法。 【先前技術】 近年來,爲了達到MOSFET (金氧半場效電晶體; Metal Oxide Semiconductor Field Effect Transistor)之高 速化,而將至此由Si — Si〇2所形成之MOS界面作爲通道 而取代習知型的技術,係盛行有進行下列硏究,即,使用 與Si之晶格常數相異之材料而製作出異種構造,亦即, 在矽基板上,使與矽基板之晶格常數相異的材料膜進行外 延成長,藉此在該膜上付與水平方向之壓縮或拉伸變形, 利用此種變形而製作高移動度之電晶體。 作爲利用變形之MOSFET之製造技術之一例,係列 舉有於第3 a圖至第3 e圖所示之技術。 首先,如第3a圖所示,使厚度3 00nm程度、Ge濃度 2 0atom%之SiGe層2外延成長至矽基板1上,在其之上 ,爲連續厚度20nm程度之Si層3而被外延成長。 其次,如第3 b圖所示,將氫離子注入至所獲得之矽 基板1上之整面,之後進行800°C程度的熱處理。藉由該 熱處理,由發生在氫之注入峰値附近的氫微孔隙4而延伸 之層積缺陷5爲到達至Si Ge層2與矽基板1之間的介面 1236707 (2) ,再者,使貫通錯位6產生在界面方向上。藉由使貫通錯 位6產生在該界面方向上而使SiGe層2之變形受到緩和 。此時,在已變形緩和之SiGe層2上之Si層3上係產生 拉伸變形、造成移動度增高。 之後,如第3c圖及第3b圖所示,經過一般的STI( 淺溝隔離層;shallow trench isolation)工程、形成兀件 分離領域11,在如第3e圖所示,藉由一般的製造工程來 形成閘極絕緣膜1 2、閘極電極1 3、以及源極/汲極領域 14,進而完成M0SFET。 【發明內容】 不過,在上述之製造方法中,於如第3b圖所示之注 入氫離子的工程中,將氫離子之注入量進行至SiGe層2 之緩和已完全結束,藉由之後的熱處理,氫之微孔隙4係 被形成過多、而形成過多的層積缺陷。此種過多的層積缺 陷係爲,用以產生無法停止於SiGe層2與矽基板1之間 的介面、而是到達至Si層3表面爲止的貫通錯位6。由 該氫之微孔隙4所產生之貫通錯位6係藉由氫之微孔隙4 而固定,因此造成難以藉由以後續之工程來去除。 在此,係嘗試有將氫離子之注入量設定爲少於使 SiGe層2完全緩和之量的注入量,藉此,藉由之後的熱 處理,而防止由氫之微孔隙4產生之貫通錯位6的發生。 不過,即使將氫離子之注入量設定爲使SiGe層2完 全緩和之量還少的注入量,在之後的熱處理係如第3 b圖 -5- 1236707 (3) 所示’仍無法免除在新的SiGe層2與矽基板1之間的界 面產生貫通錯位6。從而,在此狀態中,如第3 c圖及第 3d圖所示,經過一般的STI工程而製作MOSFET後,如 第3 e圖所示,在源極/汲極領域1 4之下部係形成多數存 在有貫通錯位6,造成在其接合中之逆向電壓施加時之洩 漏電流的增大,而具有無法確定高品質之MOSFET製造 技術的課題。 本發明係有鑑於上述課題,其目的係爲提供一種半導 體裝置之製造方法,爲即使由SiGe層2與矽基板1之間 的界面產生貫通錯位6,仍可將其緩和、而使接合洩漏電 流停止在最小限度下。 〔用以解決課題之手段〕 藉由本發明係爲提供一種半導體基板之製造方法,爲 進行有:(a)將SiGe層形成在表面爲由矽所形成之基板 上;(b)再於其上形成半導體層;(c)將離子注入至形 成元件分離形成領域之基板上的領域中之SiGe層,而進 行熱處理。 【實施方式】 在本發明之半導體基板之製造方法中,首先,在工程 (a)中,爲將SiGe層形成在表面爲由矽所形成之基板上 〇 所謂表面爲由矽所形成之基板係指,在表面上爲具有 -6 - (4) 1236707 混合非結晶質、微晶、單結晶、多結晶、混合有該等結晶 狀態之2個以上之矽基板或待等矽層,換言之,爲包含有 SOI基板。在其中,係以單結晶矽基板爲佳。
SiGe層係可藉由習知之方法、例如爲藉由cvd法、 潑射法、真空蒸鍍法、MEB法等各種方法所形成。在其 中’係以藉由CVD法所進行之外延成長法來形成者爲佳 。在此情況之成膜條件係可在該分野中選擇已知之條件, 特別是成膜溫度係例如爲4 0 0〜9 0 0。(:、較佳爲4 0 0〜6 5 0 °C程度爲適當。具體而言,在形成具有以下範圍之Ge濃 度之SiGe層的情況下,例如,用以成長30atom%之Ge 濃度之SiGe層之情況下,成膜溫度係以50(TC以下爲佳 。在該SiGe層中,Ge濃度雖並未有特別限定,不過,例 如爲列舉有 10〜50atom%程度、較佳爲 10〜40atom%、 更佳爲20〜30at〇m%。SiGe層之膜厚係爲,以在後之變 形緩和退火工程產生之SiGe層矽基板間之界面的滑動錯 位不致將不良影響波及至在其上形成之半導體裝置(例如 MOSFET)的膜厚者爲佳。即使是作爲膜厚之手法,一般 爲以降低成長溫度者爲有效。另一方面,當將SiGe層堆 積在基板上時,係以產生SiGe層之晶格變形緩和狀之膜 厚、亦即爲較臨界膜厚更薄者爲佳。具體而言,爲列舉有 50〜5 00nm程度、更以1〇〇〜5 00nm程度爲適當。特別是 在後製工程中考慮到形成pN接合後,s i G e層之膜厚係以 300nm以上者爲佳。 其次,在工程(b )中,爲在所獲得之基板上形成半 1236707 (10) 在第1 d圖形成之層積缺陷9,而於層積缺陷9中可受到 限制。此種已受限制之錯位1 〇在熱性方面爲呈安定,在 之後的Si製造技術所採用之1 000°C以下之熱處理係不會 再被釋出。 其次,依據習知之MOSFET製造技術,如第le圖所 示而形成閘極絕緣膜1 2、N型多結晶Si膜所形成之閘極 電極、以及N型之源極/汲極領域14,完成MOSFET。 藉此所製作出之半導體裝置係如第2圖所示,在使1 X 1 015crrT2程度p型不純物已被摻雜之矽基板1上,爲形 成有厚度3 00nm之SiGe層2以及厚度20nm之Si層3, 在其之上爲經由閘極絕緣膜1 2而形成閘極電極1 3。在閘 極電極1 3之兩側爲形成有源極/汲極領域1 4,在源極/ 汲極領域14間、於閘極電極13正下方之Si Ge層2上爲 形成有通道領域。此種半導體裝置爲藉由溝型之元件分離 領域1 1而由其他元件分離。 此外,使微孔隙4形成在比SiGe層2與矽基板1之 間的界面更深50nm程度之位置上,由該微孔隙4所產生 之層積缺陷(錯位)5係延伸至SiGe層2與矽基板1之 間的界面,此係爲實現大部分之SiGe層2之變形緩和。 再者,於元件分離領域1 1之下方爲形成有層積缺陷 9,在該層積缺陷9上爲捕獲有以SiGe層2之變形緩和所 產生之錯位1 〇。 藉此’在形成有MOS電晶體之領域中,產生在SiGe 層2中之貫通錯位爲移動至層積缺陷9、且形成爲被捕獲 -13- 1236707 (12) 會移動、而不會產生問題。 從而,在Μ Ο S電晶體之電氣性動作中,並未具有接 合拽漏等缺陷,而可實現良好的特性。 〔發明效果〕 若藉由本發明,採用使用有SiGe之假想基板而形成 高速MOSFET之情況下爲形成問題,使活性領域之錯位 被受限於元件分離領域下方,藉由不至在活性領域中造成 影響而可製造出一種大幅減低形成習知問題之接合洩漏的 半導體基板。藉由使用此種半導體基板,使用變形Si, 而可實現在習知製造中無法達成之高速且低消費電力之 LSI。 【圖式簡單說明】 第la圖至第le圖係用以說明本發明之半導體基板之 製造方法之實施例的局部槪略斷面工程圖。 第2圖係使用有藉由第1 a圖至第1 e圖之方法所獲得 之半導體基板之半導體裝置之局部槪略斷面圖。 第3 a圖至第3 e圖係用以說明習知之半導體裝置之製 造方法的局部槪略斷面工程圖。 〔主要部分之代表符號說明〕 1 :矽基板 2 : SiGe 層 -15-
Claims (1)
1236707 Ψ U Ij ;:-;; 拾、申請專利範圍 ~~一一 第92 1 1 2 1 45號專利申請案 中文申請專利範圍修正本 民國94年4月(多曰修正 1· 一種半導體基板之製造方法,其特徵爲:(a)表 面由矽所構成之基板上形成SiGe層;(b )又在該上形成 半導體層;(c )於爲元件分離形成領域之基板上的領域 中之SiGe層內注入離子,進行熱處理, 在工程(c )之離子注入前,在爲元件分離形成領域 之領域上’形成底部位於SiGe層之溝,並對在該溝底部 進行工程(c )之離子注入。 2 _如申請專利範圍第1項之半導體基板之製造方法 ,其中,將工程(c )之離子注入,由氫、惰性氣體、以 及2族至5族元素所形成之群所選擇出離子而以i χ 1 〇 15 c m _2之劑量來進行。 3 ·如申請專利範圍第2項之半導體基板之製造方法 ,其中,離子係爲矽離子、鍺離子或是砷離子。 4. 如申請專利範圍第1項之半導體基板之製造方法 ,其中,將SiGe層形成10〜50atom%之Ge濃度、5〇nm 〜500nm之膜厚。 5. 如申請專利範圍第1項之半導體基板之製造方法 ,其中,半導體層是Si、C添加Si或是比SiGe層Ge濃 度還低的SiGe層。 6. 如申請專利範圍第1項之半導體基板之製造方法 1236707 ,其中,半導體基板爲被使用在MOS電晶體。 7. —種半導體基板之製造方法,其特徵爲:由(a) 在表面由矽所構成之基板上形成SiGe層;(b)又在該上 形成半導體層;(c )於爲元件分離形成領域之基板上的 領域中之SiGe層內注入從氫、惰性氣體以及2 — 5族元素 所構成之群中被選擇出之離子,並進行熱處理;;(d) 將從氫、惰性氣體以及4族元素所構成之群中被選擇出之 離子注入基板內,進行熱處理之工程所構成,該些工程是 依照工程(a )、工程(d )、工程(b )、工程(c )或是 工程(a )、工程(b )、工程(d )、工程(c )之順序來 實施, 在工程(c )之離子注入前,於爲元件分離形成領域 之領域上,形成底部位於SiGe層之溝,並對該溝底部進 行工程(c )之離子注入。 8. 如申請專利範圍第7項之半導體基板之製造方法 ,其中,將工程(c )之離子注入,以1 X 1 015cnT2之劑量 來進行。 9. 如申請專利範圍第8項之半導體基板之製造方法 ,其中,離子係爲矽離子、鍺離子或是砷離子。 10·如申請專利範圍第7項之半導體基板之製造方法 ,其中,將工程(d )之離子注入由氫、惰性氣體以2 X 1 0 1 6 C ηΤ 2以下之劑量來進行。 11.如申請專利範圍第1 0項之半導體基板之製造方 法,其中,離子係爲氫離子、氦離子、氖離子、矽離子、 -2- 1236707 碳離子、或是鍺離子。 1 2 ·如申請專利範圍第7項之半導體基板之製造方法 ,其中,工程(d )之離子注入係藉由調整加速能量,使 得S i G e層/基板界面之矽基板側達到注入峰値。 1 3 ·如申請專利範圍第7項之半導體基板之製造方法 ,其中,工程(d )之離子注入係藉由調整加速能量,使 得由SiGe層基板間之界面至基板側達到20nm以上深的 位置。 1 4 ·如申請專利範圍第7項之半導體基板之製造方法 ,其中,以比SiGe於完全緩和還少的量,來執行工程(d )之離子注入。 1 5 .如申請專利範圍第7項之半導體基板之製造方法 ,其中,將SiGe層形成10〜50atom%之Ge濃度、50nm 〜500nm之膜厚。 1 6 ·如申請專利範圍第7項之半導體基板之製造方法 ,其中,半導體層是Si、C添加Si或是比SiGe層Ge濃 度還低的SiGe層。 1 7 ·如申請專利範圍第7項之半導體基板之製造方法 ,其中,半導體基板爲被使用在MOS電晶體。 18. —種半導體基板之製造方法,其特徵爲:由(a )在表面由矽所構成之基板上形成SiGe層;(b)又在該 上形成半導體層;(c )做成元件分離形成領域之基板上 的領域中之SiGe層內注入離子,進行熱處理;;((1一) 在基板內形成微空腔而注入離子,進行熱處理之工程所構 -3- 1236707 成,該些工程是依照工程(a )、工程(d / )、 )、工程(c )或是工程(a )、工程(b )、工ί 、工程(c )之順序來實施, 之後在工程(c)之離子注入之前,於爲元 成領域之領域上,形成底部位於SiGe層之溝,方 )中,對該溝底部執行Si離子注入。 工程(b g ( r ) 件分離形 令工程(c -4-
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KR100560815B1 (ko) | 2004-03-16 | 2006-03-13 | 삼성전자주식회사 | 이형 반도체 기판 및 그 형성 방법 |
EP1605498A1 (en) * | 2004-06-11 | 2005-12-14 | S.O.I. Tec Silicon on Insulator Technologies S.A. | A method of manufacturing a semiconductor wafer |
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JP2006140447A (ja) * | 2004-10-14 | 2006-06-01 | Renesas Technology Corp | 半導体装置およびその製造方法 |
DE102004054564B4 (de) * | 2004-11-11 | 2008-11-27 | Siltronic Ag | Halbleitersubstrat und Verfahren zu dessen Herstellung |
JP5055771B2 (ja) * | 2005-02-28 | 2012-10-24 | 富士通セミコンダクター株式会社 | 半導体装置およびその製造方法 |
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DE102005054219B4 (de) * | 2005-11-14 | 2011-06-22 | Infineon Technologies AG, 81669 | Verfahren zum Herstellen eines Feldeffekttransistors und Feldeffekttransistor |
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