JP2010530032A - 反応流による無機箔体の析出および合成法 - Google Patents
反応流による無機箔体の析出および合成法 Download PDFInfo
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- JP2010530032A JP2010530032A JP2010512185A JP2010512185A JP2010530032A JP 2010530032 A JP2010530032 A JP 2010530032A JP 2010512185 A JP2010512185 A JP 2010512185A JP 2010512185 A JP2010512185 A JP 2010512185A JP 2010530032 A JP2010530032 A JP 2010530032A
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Abstract
【選択図】 図7
Description
本出願は、“低大気圧CVD”と称されてヒースメア等(Hiesmair et al)により2007年6月15日に出願された同時係属中の米国仮特許出願第60/934,793号、および、“剥離層上に無機箔体を合成する析出法”と称されてヒースメア等により2008年1月25日に出願された同時係属中の米国仮特許出願第61/062,398号の優先権を主張するものであり、両出願ともに言及したことにより本明細書中に援用される。
102 反応チャンバ
104 搬送システム
106 底部ヒータ
108 放射ヒータ
110 反応物質ノズル/取入ノズル
112 排出口
114 排出口
120 圧力計
122 反応物質供与システム
128 ノズル
130 中央反応物質取入口
132、134 間隙
136、138 プレート
144 ノズル
146 中央反応物質取入口
148、150 遮蔽ガス取入口
152、154 排出間隙
156、158、160、162 離間プレート
180 反応物質供与システム
182 気体供与サブシステム
184 蒸気供与サブシステム
186 混合サブシステム
190 第1気体前駆体供給源
192 第2気体前駆体供給源
194 不活性気体供給源
198 気体マニフォルド
200 圧力解放バルブ
210、212、214 瞬間蒸発器
216 マニフォルド
218 共通送給ライン
220 管路
228 加熱制御器
250 製造ライン
252 積載ステーション
254 第1析出チャンバ/第1析出システム
256 第2析出チャンバ/第2析出システム
258 第3析出チャンバ/第3析出システム
260 第4析出チャンバ/第4析出システム
262 収集ステーション
264、266、268、270、272 移送区画/移送ステーション
300 析出システム
302 チャンバ
304 搬送システム
306 CVDノズル
308 LRDノズル
310 光学システム
312 光学的管路
314 ビームダンプ/光度計
350 析出チャンバ
352 チャンバ
354 ノズル
356 基板スロット
358 底部ヒータ
360 並進モジュール
362 光学システム
364 光管
366 伸縮自在の光学機器
CVDは、低大気圧にて指向流形態で効果的に実施され得ることが見出された。反応物質流束を開始する指向流は、スリットの如き大きな縦横比を有するオリフィスを介して導向されることから、反応物質取入口を通過する単一回の並進により大面積が反応性蒸着により被覆され得る。適切な排出口が位置決めされることで、未反応組成物が除去され得ると共に、チャンバ圧力が選択範囲内に維持され得る。
特定構造の製造に対し、概略的には複数の層が析出され得る。幾つかの実施例において、これらの層の内の一層は、孔質の粒子性剥離層である。付加的なまたは代替的な実施例において、これらの層の内のひとつ以上の層は、走査型低大気圧CVDにより蒸着され得る。これらの複数の層は、ひとつの共通の反応チャンバ内で、または、別体の複数の反応チャンバ内、または、それらの組み合わせにて蒸着され得る。もしひとつ以上の反応チャンバが使用されるなら、基板の効率的な取扱いのために、複数の反応チャンバは一体化されて共通の自動化製造ラインとされ得る。上記製造ライン中への導入に先立ち、一回以上の被覆段階が実施され得る。
剥離層は、無機箔体として上側層を分離する能力を以て該剥離層上に無機層の析出を実施する能力を提供する。剥離層は、該剥離層を隣接材料から区別する特性および/または組成を有する。概略的に、剥離層に対して化学的および/または物理的な相互作用が付与されて該剥離層が除去もしくは破砕されることで、引き続き析出された層は引き離される。上側被覆構造は一回以上の付加的な析出段階により、および、選択的には更なる処理により形成され得る一方、該構造は上記剥離層と結合される。幾つかの実施例において上記剥離層は、孔質の粒子性層である。CVDは、孔質の粒子性剥離層上へと上側層を蒸着すべく使用され得る一方、上側層を無機箔体として剥離すべく上記剥離層が破砕される能力を維持し得ることが見出された。孔質の粒子性剥離層は、光反応析出の如き反応性析出手法を用いて、または、粒子分散液を用いた粉体被覆の析出により形成され得る。
概略的に、孔質の粒子性剥離層上にはひとつ以上の上側層が析出され得る。剥離層における上側層を破砕により又は別様に剥離すると、無機箔体に帰着し得る。以下における考察の適切な部分は、走査型低大気圧CVDを用いて蒸着された被覆層であって、剥離層との関連なしで永続的層として利用されるという被覆層にも適用される。概略的に、上側層は選択された組成を備え得ると共に、上側層は、結果的な構造の意図用途に基づき選択された特性を有し得る。幾つかの実施例において、複数の上側層の内の少なくともひとつの層は、ドープされても良く、されなくても良いという元素状ケイ素層である。該元素状ケイ素層は引き続き、種々の半導体用途に適用され得る。下側に位置する基板から上側被覆構造を分離する上記機能によれば、大面積で薄寸である元素状のケイ素および/またはゲルマニウムの箔体、ならびに、他の構造が形成され得る。分離された構造は処理され、光起電性デバイスまたはディスプレイの如き所望のデバイスとされ得る。剥離層上に複数の上側層が析出されるなら、析出段階間において、且つ/又は、複数の層の析出が完了した後に、加熱処理の如き各層の付加的処理が実施され得る。
AaBbCcDdEeFfGgHhIiJjKkLlMmNnOo
式中、
A、B、C、D、E、F、G、H、I、J、K、L、M、NおよびOの各々は独立的に存在しまたは存在せず、
A、B、C、D、E、F、G、H、I、J、K、L、M、NおよびOの内の少なくとも一種類が存在し、且つ、1A族の元素、2A族の元素、3B族の元素(ランタニド系列の元素およびアクチニド系列の元素を含む)、4B族の元素、5B族の元素、6B族の元素、7B族の元素、8B族の元素、1B族の元素、2B族の元素、3A族の元素、4A族の元素、5A族の元素、6A族の元素、および、7A族の元素から成る周期表の元素から成る群から独立的に選択され;且つ、
a、b、c、d、e、f、g、h、i、j、k、l、m、nおよびoの各々は、独立的に選択されると共に、約1、10、100、1000、10000、100000、1000000の数により且つその適切な合計が企図されて、約1〜約1,000,000の範囲内の値から化学量論的に実現可能である。上記材料は、結晶質、非晶質、または、それらの組み合わせとされ得る。換言すると、上記元素は、希ガス以外の、周期表からの任意の元素とされ得る。本明細書中に記述される如く、任意の特定の組成物、一群の組成物、属、亜属などを単独でまたは併せたものを除き、適切な状況においては、全ての無機化合物またはそれらの組み合わせの如き、全ての無機組成物、ならびに、全ての部分集合の無機化合物が独特の発明的な群として企図される。
本明細書における析出手法は、概略的に種々の選択組成を備えた無機箔体および層状構造を形成すべく使用され得る。但し、半導体構造の形成が特に好適であり得る。以下の考察は元素状ケイ素の半導体材料に焦点を合わせているが、この考察においてゲルマニウム、ケイ素−ゲルマニウム合金、および、そのドープ済み組成物は、同等に使用され得る。故に、追随するケイ素半導体材料の考察において、ゲルマニウム、ケイ素−ゲルマニウム合金、および、そのドープ済み組成物はケイ素に代用され得る。上述の如く半導体箔体は、ディスプレイ回路の製造のための如く、回路を形成すべく使用され得る。但し、以下の考察の焦点は光起電性デバイスの形成である。幾つかの実施例において、半導体材料は、更なる処理により最終デバイスとされる永続的基板上へと析出され得る。但し他の実施例において半導体層は、処理されて光起電性デバイスとされるケイ素箔体の分離のために、剥離層上へと析出される。剥離層からの半導体箔体の分離に先立ち、該剥離層上には一層もしくは複数の層が析出され得る。
この実施例は、光反応析出を用いて形成された剥離層上へと走査型低大気圧CVDを用いて高品質のケイ素箔体層を析出する能力を例証する。
この実施例は、孔質の粒子性剥離層の破砕によりケイ素箔体を分離する機能を例証する。
Claims (27)
- 基板上に支持された剥離層上に無機層を形成する方法であって、
孔質の粒子性剥離層上に、化学蒸着を用いて無機層を蒸着させる段階を備えて成る、方法。 - 前記蒸着段階は、50Torrから650Torrの圧力であり、かつ、周囲圧力より低い圧力における反応チャンバ内で実施される、請求項1記載の方法。
- 前記化学蒸着プロセスに対する反応物質は、当該ノズルの取入口から前記剥離層へと流れを導向すべく配向されたノズルの取入口から流れる、請求項1記載の方法。
- 前記化学蒸着反応は熱分解反応を備えて成る、請求項1記載の方法。
- 前記無機層は元素状ケイ素を備えて成る、請求項4記載の方法。
- 前記剥離層は、サブミクロン粒子の溶融ネットワークを備えて成る、請求項1記載の方法。
- 前記剥離層は粒子の分散液の析出により形成される、請求項1記載の方法。
- 前記基板が加熱されることで前記化学蒸着が促進される、請求項1記載の方法。
- 前記化学蒸着は、プラズマ、加熱フィラメントまたは電子ビームを用いて増進される、請求項1記載の方法。
- 前記孔質の粒子性層の下側には孔質で粒子性の下側層が位置され、
上記孔質で粒子性の下側層は上記孔質の粒子性層よりも大きい一次粒子サイズを有する、請求項1記載の方法。 - 50Torr〜700Torrの圧力であり、かつ、周囲圧力より低い圧力における反応チャンバ内のノズル取入口から供与される反応物質の流れに対して移動されつつある基板上へと、化学蒸着を用いて無機材料を蒸着させる段階を備えて成る、無機層を蒸着する方法。
- 前記ノズルは前記反応チャンバに関して固定され、且つ、前記基板は上記反応チャンバに対して移動する、請求項11記載の方法。
- 前記基板は加熱されることで、該基板において生成組成物を形成する熱的反応が促進される、請求項11記載の方法。
- 前記無機材料は元素状ケイ素を備えて成り、且つ、前記反応物質は熱分解反応を受ける、請求項11記載の方法。
- 前記反応チャンバからの排出管路は前記ノズル取入口の近傍に位置決めされる、請求項11記載の方法。
- 前記圧力は75Torr〜600Torrである、請求項11記載の方法。
- 基板と、
該基板上の粉体層と、
該粉体層上に析出された略々稠密なケイ素層であって、該ケイ素層は2ミクロン〜100ミクロンの厚みを有するというケイ素層とを備えて成る、
層状構造。 - 前記層は10ミクロン〜60ミクロンの厚みを有する、請求項17記載の層状構造。
- 前記粉体層は、窒化ケイ素、酸化ケイ素、酸窒化ケイ素、または、それらの組み合わせを備えて成る、請求項17記載の層状構造。
- 前記粉体層は50nm〜50ミクロンの厚みを有する、請求項17記載の層状構造。
- 前記層は少なくとも100平方センチメートルの表面積を有する、請求項17記載の層状構造。
- 剥離層上に無機層を形成する方法であって、
基板上に粉体被覆を形成する段階であって、該被覆の形成は基板上に粒子分散液を析出させる段階を備えて成るという段階と、
上記粉体被覆上へと、上記基板へと指向されたノズルの取入口から開始される反応流から無機組成物を析出する段階とを備えて成る、方法。 - 前記分散液は、2ミクロン以下の体積平均二次粒子サイズと、少なくとも2重量%の粒子濃度とを有する粒子を備えて成る、請求項22記載の方法。
- 前記粒子分散液を析出する前記段階は上記分散液を回転塗付する段階を備えて成る、請求項22記載の方法。
- 前記粒子分散液は、化学結合された有機組成物により表面改質された粒子を備えて成る、請求項22記載の方法。
- 反応物質流が光線を通過することで、前記基板へと導向される生成物流を形成する反応を推進する、請求項22記載の方法。
- 前記無機組成物を析出する前記段階は化学蒸着を備えて成る、請求項22記載の方法。
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PCT/US2008/007330 WO2008156631A2 (en) | 2007-06-15 | 2008-06-12 | Reactive flow deposition and synthesis of inorganic foils |
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EP (1) | EP2167703A4 (ja) |
JP (1) | JP2010530032A (ja) |
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TW200907099A (en) | 2009-02-16 |
EP2167703A2 (en) | 2010-03-31 |
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EP2167703A4 (en) | 2011-03-16 |
KR20100029126A (ko) | 2010-03-15 |
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