JP2011071493A - 半導体基板の再生方法、再生半導体基板の作製方法、および、soi基板の作製方法 - Google Patents
半導体基板の再生方法、再生半導体基板の作製方法、および、soi基板の作製方法 Download PDFInfo
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- JP2011071493A JP2011071493A JP2010184780A JP2010184780A JP2011071493A JP 2011071493 A JP2011071493 A JP 2011071493A JP 2010184780 A JP2010184780 A JP 2010184780A JP 2010184780 A JP2010184780 A JP 2010184780A JP 2011071493 A JP2011071493 A JP 2011071493A
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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
- H01L21/02002—Preparing wafers
- H01L21/02005—Preparing bulk and homogeneous wafers
- H01L21/02032—Preparing bulk and homogeneous wafers by reclaiming or re-processing
-
- 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
- H01L21/76251—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology using bonding techniques
- H01L21/76254—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology using bonding techniques with separation/delamination along an ion implanted layer, e.g. Smart-cut, Unibond
-
- 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
- H01L21/02002—Preparing wafers
- H01L21/02005—Preparing bulk and homogeneous wafers
- H01L21/02008—Multistep processes
- H01L21/0201—Specific process step
- H01L21/02024—Mirror polishing
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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
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
-
- 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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/0206—Cleaning during device manufacture during, before or after processing of insulating 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
- H01L21/02—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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30604—Chemical etching
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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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/322—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to modify their internal properties, e.g. to produce internal imperfections
- H01L21/3221—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to modify their internal properties, e.g. to produce internal imperfections of silicon bodies, e.g. for gettering
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Thin Film Transistor (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Recrystallisation Techniques (AREA)
Abstract
【解決手段】イオンの照射等により損傷した半導体領域を選択的に除去することが可能な方法を用いて半導体基板の凸部を除去し、さらに、CMP法をはじめとする研磨処理によって、半導体基板の平坦化を行う際に、半導体基板表面に酸化膜を形成することにより、半導体基板の研磨レートを均一にして、一様に研磨処理を行う。または、上記方法を用いて再生半導体基板を作製し、当該再生半導体基板を用いてSOI基板を作製する。
【選択図】図2
Description
本実施の形態では、半導体基板の再生方法について、図1を用いて説明する。
本実施の形態に係るSOI基板の製造方法は、ボンド基板である半導体基板から分離させた半導体層をベース基板に接合してSOI基板を製造する。そして、半導体層が分離された後の半導体基板に再生処理を施して、ボンド基板として再利用する。以下、図3〜図5の断面図と図6のSOI基板作製工程図を参照して、本形態に係るSOI基板の製造方法の一例について説明する。
O2+hν1(λ1nm)→O(3P)+O(3P) (1)
O(3P)+O2→O3 (2)
O3+hν2(λ2nm)→O(1D)+O2 (3)
O2+hν3(λ3nm)→O(1D)+O(3P) (4)
O(3P)+O2→O3 (5)
O3+hν3(λ3nm)→O(1D)+O2 (6)
本実施の形態では、耐熱性の高いシリコン基板等をベース基板として用いてSOI基板を作製する場合について説明する。なお、本実施の形態において示す方法は、多くの部分で先の実施の形態と共通している。よって、本実施の形態では、主に相違点について説明することとする。図面については、先の実施の形態と共通であるため、ここでは特に示さない。
先の実施の形態において作製されたSOI基板を用いた半導体装置の一例を、図7に示す。
102 絶縁層
104 脆化領域
120 ベース基板
121 半導体基板
122 絶縁層
123 絶縁層
124 半導体層
125 半導体領域
126 凸部
127 半導体領域
129 半導体領域
130 半導体基板
132 再生半導体基板
133 半導体領域
134 第1の酸化膜
135 第2の酸化膜
144 ブリスター
145 領域
251 半導体層
252 半導体層
254 絶縁層
255 ゲート電極
256 ゲート電極
257 低濃度不純物領域
258 チャネル形成領域
259 高濃度不純物領域
260 チャネル形成領域
261 サイドウォール絶縁層
262 サイドウォール絶縁層
267 高濃度不純物領域
268 絶縁層
269 層間絶縁層
270 配線
280 トランジスタ
281 トランジスタ
300 凸部
Claims (13)
- イオンの照射および熱処理を経て一部が半導体層として分離することにより、周縁部に損傷半導体領域と絶縁層とを含む凸部が残存した半導体基板に対し、
前期絶縁層が除去されるエッチング処理と、
前記半導体基板を構成する半導体材料を酸化する物質、前記酸化された半導体材料を溶解する物質、および、前記半導体材料の酸化の速度および前記酸化された半導体材料の溶解の速度を制御する物質、を含む混合液を用いて、未損傷の半導体領域に対して前記損傷半導体領域が選択的に除去されるエッチング処理と、
前記半導体基板の表面に酸化膜の形成と、
前記酸化膜の表面からの研磨処理により、前記半導体基板の表面の露出と共に前記半導体基板の表面の平坦化と、
を行う半導体基板の再生方法。 - 請求項1において、
オゾンを含む水溶液を用いて、前記酸化膜の形成を行う半導体基板の再生方法。 - イオンの照射および熱処理を経て一部が半導体層として分離することにより、周縁部に損傷半導体領域と絶縁層とを含む凸部が残存した半導体基板に対し、
前期絶縁層が除去されるエッチング処理と、
前記半導体基板を構成する半導体材料を酸化する物質、前記酸化された半導体材料を溶解する物質、および、前記半導体材料の酸化の速度および前記酸化された半導体材料の溶解の速度を制御する物質、を含む混合液を用いて、未損傷の半導体領域に対して前記損傷半導体領域が選択的に除去されるエッチング処理と、
前記損傷半導体領域が選択的に除去されるエッチング処理において部分的に残存した第1の酸化膜が除去されるエッチング処理と、
前記半導体基板の表面に第2の酸化膜の形成と、
前記第2の酸化膜の表面からの研磨処理により、前記半導体基板の表面の露出と共に前記半導体基板の表面の平坦化と、
を行う半導体基板の再生方法。 - 請求項3において、
オゾンを含む水溶液を用いて、前記第2の酸化膜の形成を行う半導体基板の再生方法。 - 請求項3又は請求項4において、
前記第1の酸化膜が除去されるエッチング処理と、前記第2の酸化膜の形成を繰り返し行う半導体基板の再生方法。 - 請求項3乃至請求項5のいずれか一項において、
フッ酸を含む溶液を用いて、前記第1の酸化膜が除去されるエッチング処理を行う半導体基板の再生方法。 - 請求項1乃至請求項6のいずれか一項において、
CMP処理を用いて前記研磨処理を行う半導体基板の再生方法。 - 請求項1乃至請求項7のいずれか一項において、
前記イオンの照射は、質量分離を行わずになされたものである半導体基板の再生方法。 - 請求項1乃至請求項7のいずれか一項において、
前記イオンの照射は、質量分離を行ってなされたものである半導体基板の再生方法。 - 請求項1乃至請求項9のいずれか一項において、
前記イオンは、H3 +を含む半導体基板の再生方法。 - 請求項1乃至請求項10のいずれか一項において、
前記半導体基板を構成する半導体材料を酸化する物質として硝酸を、
前記酸化された半導体材料を溶解する物質としてフッ酸を、
前記半導体材料の酸化の速度および前記酸化された半導体材料の溶解の速度を制御する物質として酢酸を、
用いる半導体基板の再生方法。 - 請求項1乃至請求項11のいずれか一項に記載の方法を用いて、前記半導体基板から再生半導体基板を作製する再生半導体基板の作製方法。
- 請求項12に記載の方法で作製された再生半導体基板中にイオンを照射して脆化領域を形成し、
絶縁層を介して、前記再生半導体基板とベース基板を貼り合わせ、
熱処理によって前記再生半導体基板を分離して、前記ベース基板上に半導体層を形成するSOI基板の作製方法。
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US8318588B2 (en) | 2012-11-27 |
JP5520744B2 (ja) | 2014-06-11 |
KR20110021670A (ko) | 2011-03-04 |
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