JP5394653B2 - Soi基板の製造方法 - Google Patents
Soi基板の製造方法 Download PDFInfo
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- JP5394653B2 JP5394653B2 JP2008109817A JP2008109817A JP5394653B2 JP 5394653 B2 JP5394653 B2 JP 5394653B2 JP 2008109817 A JP2008109817 A JP 2008109817A JP 2008109817 A JP2008109817 A JP 2008109817A JP 5394653 B2 JP5394653 B2 JP 5394653B2
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
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- H01—ELECTRIC ELEMENTS
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- 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
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
- H01L21/3165—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation
- H01L21/31654—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself
- H01L21/31658—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself by thermal oxidation, e.g. of SiGe
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- H01L21/02233—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer
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- H01L21/02238—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor silicon in uncombined form, i.e. pure silicon
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
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Description
図1(B)はブロッキング層109の一例として、支持基板101側から窒化酸化シリコン膜105と酸化窒化シリコン膜106を設ける構成について示している。
上記のような水素プラズマ中には、H+、H2 +、H3 +といった水素イオン種が存在する。ここで、各水素イオン種の反応過程(生成過程、消滅過程)について、以下に反応式を列挙する。
e+H→e+H++e ・・・・・ (1)
e+H2→e+H2 ++e ・・・・・ (2)
e+H2→e+(H2)*→e+H+H ・・・・・ (3)
e+H2 +→e+(H2 +)*→e+H++H ・・・・・ (4)
H2 ++H2→H3 ++H ・・・・・ (5)
H2 ++H2→H++H+H2 ・・・・・ (6)
e+H3 +→e+H++H+H ・・・・・ (7)
e+H3 +→H2+H ・・・・・ (8)
e+H3 +→H+H+H ・・・・・ (9)
上記のように、H3 +は、主として反応式(5)により表される反応過程により生成される。一方で、反応式(5)と競合する反応として、反応式(6)により表される反応過程が存在する。H3 +が増加するためには、少なくとも、反応式(5)の反応が、反応式(6)の反応より多く起こる必要がある(なお、H3 +が減少する反応としては他にも(7)、(8)、(9)が存在するため、(5)の反応が(6)の反応より多いからといって、必ずしもH3 +が増加するとは限らない。)。反対に、反応式(5)の反応が、反応式(6)の反応より少ない場合には、プラズマ中におけるH3 +の割合は減少する。
ここで、イオン種の割合(特にH3 +の割合)が異なる例を示す。図23は、100%水素ガス(イオン源の圧力:4.7×10−2Pa)から生成されるイオンの質量分析結果を示すグラフである。なお、上記質量分析は、イオン源から引き出されたイオンを測定することにより行った。横軸はイオンの質量である。スペクトル中、質量1、2、3のピークは、それぞれ、H+、H2 +、H3 +に対応する。縦軸は、スペクトルの強度であり、イオンの数に対応する。図23では、質量が異なるイオンの数量を、質量3のイオンを100とした場合の相対比で表している。図23から、上記イオン源により生成されるイオンの割合は、H+:H2 +:H3 +=1:1:8程度となることが分かる。なお、このような割合のイオンは、プラズマを生成するプラズマソース部(イオン源)と、当該プラズマからイオンビームを引き出すための引出電極などから構成されるイオンドーピング装置によっても得ることが出来る。
図23のような複数のイオン種を含むプラズマを生成し、生成されたイオン種を質量分離しないで単結晶半導体基板に照射する場合、単結晶半導体基板の表面には、H+、H2 +、H3 +の各イオンが照射される。イオンの照射からイオン導入領域形成にかけてのメカニズムを再現するために、以下の5種類のモデルを考える。
1.照射されるイオン種がH+で、照射後もH+(H)である場合
2.照射されるイオン種がH2 +で、照射後もH2 +(H2)のままである場合
3.照射されるイオン種がH2 +で、照射後に2個のH(H+)に分裂する場合
4.照射されるイオン種がH3 +で、照射後もH3 +(H3)のままである場合
5.照射されるイオン種がH3 +で、照射後に3個のH(H+)に分裂する場合。
上記のモデルを基にして、水素イオン種をSi基板に照射する場合のシミュレーションを行った。シミュレーション用のソフトウェアとしては、SRIM(the Stopping and Range of Ions in Matter:モンテカルロ法によるイオン導入過程のシミュレーションソフトウェア、TRIM(the Transport of Ions in Matter)の改良版)を用いている。なお、計算の関係上、モデル2ではH2 +を質量2倍のH+に置き換えて計算した。また、モデル4ではH3 +を質量3倍のH+に置き換えて計算した。さらに、モデル3ではH2 +を運動エネルギー1/2のH+に置き換え、モデル5ではH3 +を運動エネルギー1/3のH+に置き換えて計算を行った。
[フィッティング関数]
=X/V×[モデル1のデータ]+Y/V×[モデル5のデータ]
・モデル3に示される照射過程により導入される水素は、モデル5の照射過程と比較して僅かであるため、除外して考えても大きな影響はない(SIMSデータにおいても、ピークが現れていない)。
・モデル5とピーク位置の近いモデル3は、モデル5において生じるチャネリング(結晶の格子構造に起因する元素の移動)により隠れてしまう可能性が高い。すなわち、モデル3のフィッティングパラメータを見積もるのは困難である。これは、本シミュレーションが非晶質Siを前提としており、結晶性に起因する影響を考慮していないことによるものである。
図23に示すようなH3 +の割合を高めた水素イオン種を基板に照射することで、H3 +に起因する複数のメリットを享受することができる。例えば、H3 +はH+やHなどに分離して基板内に導入されるため、主にH+やH2 +を照射する場合と比較して、イオンの導入効率を向上させることができる。これにより、半導体基板の生産性向上を図ることができる。また、同様に、H3 +が分離した後のH+やHの運動エネルギーは小さくなる傾向にあるから、薄い半導体層の製造に向いている。
102 単結晶半導体層
103 酸化膜
104 接合層
105 窒化酸化シリコン膜
106 酸化窒化シリコン膜
108 半導体基板
109 ブロッキング層
110 分離層
111 ゲート絶縁層
112 ゲート電極
113 サイドウオール絶縁層
114 第1不純物領域
115 第2不純物領域
116 絶縁層
117 保護膜
118 層間絶縁膜
119 コンタクトホール
120 コンタクトプラグ
121 配線
122 表示パネル
123 走査線駆動回路領域
124 信号線駆動回路領域
125 画素形成領域
126 走査線
127 信号線
128 画素電極
129 対向基板
130 対向電極
131 柱状スペーサ
132 液晶層
133 選択トランジスタ
134 表示制御トランジスタ
135 電流供給線
136 隔壁層
137 EL層
138 封止樹脂
148 層間絶縁膜
200 マイクロプロセッサ
201 演算回路
202 演算回路制御部
203 命令解析部
204 割り込み制御部
205 タイミング制御部
206 レジスタ
207 レジスタ制御部
208 バスインターフェース
209 読み出し専用メモリ
210 ROMインターフェース
211 RFCPU
212 アナログ回路部
213 デジタル回路部
214 共振回路
215 整流回路
216 定電圧回路
217 リセット回路
218 発振回路
219 復調回路
220 変調回路
221 RFインターフェース
222 制御レジスタ
223 クロックコントローラ
224 CPUインターフェース
225 中央処理ユニット
226 ランダムアクセスメモリ
227 読み出し専用メモリ
228 アンテナ
229 容量部
230 電源管理回路
301 携帯電話機
302 表示部
303 操作スイッチ
304 デジタルプレーヤー
305 イヤホン
306 電子ブック
Claims (6)
- ハロゲンを含む酸化性雰囲気中で熱処理を行って、半導体基板の表面に前記ハロゲンを含む酸化膜を形成し、
前記酸化膜の表面に、電界で加速した一種類の原子から成る複数の質量の異なるイオンを照射して、前記半導体基板に分離層を形成し、
前記酸化膜の表面上に酸化シリコン膜を形成し、
前記酸化膜及び前記酸化シリコン膜を挟んで前記半導体基板と絶縁表面を有する基板とを重ね合わせた状態で熱処理を行って、前記分離層で分離して前記絶縁表面を有する基板上に半導体層を形成し、
前記一種類の原子から成る質量の異なるイオンは、H + イオン、H 2 + イオン、及びH 3 + イオンを含み、
前記H + イオン及び前記H 2 + イオンよりも前記H 3 + イオンの割合が高いことを特徴とするSOI基板の製造方法。 - ハロゲンを含む酸化性雰囲気中で熱処理を行って、半導体基板の表面に前記ハロゲンを含む酸化膜を形成し、
前記酸化膜の表面に、電界で加速した一種類の原子から成る複数の質量の異なるイオンを照射して、前記半導体基板に分離層を形成し、
絶縁表面を有する基板上に酸化シリコン膜を形成し、
前記酸化膜及び前記酸化シリコン膜を挟んで前記半導体基板と前記絶縁表面を有する基板とを重ね合わせた状態で熱処理を行って、前記分離層で分離して前記絶縁表面を有する基板上に半導体層を形成し、
前記一種類の原子から成る質量の異なるイオンは、H + イオン、H 2 + イオン、及びH 3 + イオンを含み、
前記H + イオン及び前記H 2 + イオンよりも前記H 3 + イオンの割合が高いことを特徴とするSOI基板の製造方法。 - ハロゲンを含む酸化性雰囲気中で熱処理を行って、半導体基板の表面に前記ハロゲンを含む酸化膜を形成し、
前記酸化膜の表面に、電界で加速した一種類の原子から成る複数の質量の異なるイオンを照射して、前記半導体基板に分離層を形成し、
前記酸化膜の表面上にブロッキング層を形成し、
前記ブロッキング層上に酸化シリコン膜を形成し、
前記酸化膜、前記ブロッキング層及び前記酸化シリコン膜を挟んで前記半導体基板と絶縁表面を有する基板とを重ね合わせた状態で熱処理を行って、前記分離層で分離して前記絶縁表面を有する基板上に半導体層を形成し、
前記一種類の原子から成る質量の異なるイオンは、H + イオン、H 2 + イオン、及びH 3 + イオンを含み、
前記H + イオン及び前記H 2 + イオンよりも前記H 3 + イオンの割合が高いことを特徴とするSOI基板の製造方法。 - ハロゲンを含む酸化性雰囲気中で熱処理を行って、半導体基板の表面に前記ハロゲンを含む酸化膜を形成し、
前記酸化膜の表面に、電界で加速した一種類の原子から成る複数の質量の異なるイオンを照射して、前記半導体基板に分離層を形成し、
絶縁表面を有する基板上にブロッキング層を形成し、
前記ブロッキング層上に酸化シリコン膜を形成し、
前記酸化膜、前記ブロッキング層及び前記酸化シリコン膜を挟んで前記半導体基板と前記絶縁表面を有する基板とを重ね合わせた状態で熱処理を行って、前記分離層で分離して前記絶縁表面を有する基板上に半導体層を形成し、
前記一種類の原子から成る質量の異なるイオンは、H + イオン、H 2 + イオン、及びH 3 + イオンを含み、
前記H + イオン及び前記H 2 + イオンよりも前記H 3 + イオンの割合が高いことを特徴とするSOI基板の製造方法。 - 請求項3又は請求項4において、
前記ブロッキング層として、窒化酸化シリコン膜又は窒化シリコン膜を形成することを特徴とするSOI基板の製造方法。 - 請求項3又は請求項4において、
前記ブロッキング層として、窒化酸化シリコン膜又は窒化シリコン膜と、酸化窒化シリコン膜と、を形成することを特徴とするSOI基板の製造方法。
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US6583440B2 (en) * | 2000-11-30 | 2003-06-24 | Seiko Epson Corporation | Soi substrate, element substrate, semiconductor device, electro-optical apparatus, electronic equipment, method of manufacturing the soi substrate, method of manufacturing the element substrate, and method of manufacturing the electro-optical apparatus |
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US6949451B2 (en) * | 2003-03-10 | 2005-09-27 | Taiwan Semiconductor Manufacturing Company, Ltd. | SOI chip with recess-resistant buried insulator and method of manufacturing the same |
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2008
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- 2008-03-21 WO PCT/JP2008/056001 patent/WO2008136225A1/en active Application Filing
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US20110037123A1 (en) | 2011-02-17 |
JP2008294425A (ja) | 2008-12-04 |
CN101669193A (zh) | 2010-03-10 |
US8847314B2 (en) | 2014-09-30 |
TWI412102B (zh) | 2013-10-11 |
CN101669193B (zh) | 2012-02-15 |
KR101436116B1 (ko) | 2014-09-01 |
WO2008136225A1 (en) | 2008-11-13 |
TW200903714A (en) | 2009-01-16 |
US20080268263A1 (en) | 2008-10-30 |
US7829433B2 (en) | 2010-11-09 |
KR20100017330A (ko) | 2010-02-16 |
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