JP2007534164A - 材料層の分離方法 - Google Patents
材料層の分離方法 Download PDFInfo
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- 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
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/268—Bombardment with radiation with high-energy radiation using electromagnetic radiation, e.g. laser radiation
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/073—Shaping the laser spot
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/53—Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/57—Working by transmitting the laser beam through or within the workpiece the laser beam entering a face of the workpiece from which it is transmitted through the workpiece material to work on a different workpiece face, e.g. for effecting removal, fusion splicing, modifying or reforming
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- H01L21/7806—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices involving the separation of the active layers from a substrate
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- H01L33/005—Processes
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- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials, e.g. fibre reinforced
- B23K2103/166—Multilayered materials
- B23K2103/172—Multilayered materials wherein at least one of the layers is non-metallic
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Abstract
Description
本願は、2004年3月29日に出願された、同時係属中の米国仮出願シリアル番号60/557,450であって、その内容が全てここに組み込まれたものの優先権の利益を主張する。
104 ターゲット材料
106 界面
110 基板
112 セクション
114 ストリート
Claims (57)
- 第1基板と第2基板と前記基板間に少なくとも一の材料層とを備る段階であって、前記少なくとも一の材料層はストリートによって複数のセクションに分離されるところの段階と;
レーザーを用いてビームスポットを形成する段階であって、前記ビームスポットは整数の数の前記セクションをカバーするような形状にされている段階と;
前記ビームスポットを用いて前記第1基板と前記第2基板との間の界面を照射する段階であって、該照射は、前記第1基板が前記セクション全てから分離されるまで前記整数の数のセクションの各々ごとに実施するところの段階と;を備えた基板から少なくとも一の材料層を分離する方法。 - 前記照射段階は、前記ビームスポットのステッチを前記セクション間の前記ストリート内だけに生ずるように、前記整数の数のセクションの各々ごとに対して実施する請求項1に記載の方法。
- 前記基板と前記層をステージ上に移動する段階と;
前記ステージの位置を所定の値と比較する段階であって、前記レーザーは前記ビームスポットを形成するために前記位置に基づいてトリガーされ、前記第1基板と前記整数の数のセクションの各々との間の前記界面を照射するところの段階と;をさらに備えた請求項1に記載の方法。 - 前記ステージは実質的に連続的に移動する請求項3に記載の方法。
- 前記セクションはほぼ矩形であり、前記ビームスポットはほぼ矩形である請求項1に記載の方法。
- さらに、前記複数のセクションを形成するために、前記少なくとも一の材料層をエッチングする段階をさらに備えた請求項1に記載の方法。
- 前記少なくとも一の材料層をエッチングする前記段階は、レーザーを用いて前記ストリートにおける前記少なくとも一の材料層の一部を選択的に除去することを含む請求項6に記載の方法。
- 前記少なくとも一の材料層をエッチングする前記段階は、エキシマレーザーを用いてパターン化レーザー投影を付与することを含む請求項7に記載の方法。
- 前記少なくとも一の材料層をエッチングする前記段階は、UVダイオードポンプされる固体レーザーを用いてダイシングすることを含む請求項7に記載の方法。
- 前記基板が半導体ウェハーであり、前記少なくとも一の材料層の前記セクションがダイに対応する請求項1に記載の方法。
- 前記第1基板と前記セクションとの間の前記界面を、ビームホモジェナイザーを用いて形成された均一ビームスポットを用いて照射する請求項1に記載の方法。
- 前記界面を照射する段階は、前記界面を、前記界面に対して角度を有してレーザー光に露光する段階を含む請求項1に記載の方法。
- 前記レーザーはエキシマレーザーであり、前記界面を照射する段階は、前記界面を、前記整数の数のセクションの各々について前記エキシマレーザーの単パルスに露光することを含む請求項1に記載の方法。
- 前記照射段階は、前記界面に爆発衝撃波を誘起するのに十分なレーザーエネルギー密度を用いて実施し、前記爆発衝撃波は前記第1基板を前記セクションから分離する請求項1に記載の方法。
- 前記照射段階は、約0.60J/cm2から1.6J/cm2の範囲のレーザーエネルギー密度を用いて実施する請求項1に記載の方法。
- 前記セクションと前記ストリートを他の材料層によってカバーする請求項1に記載の方法。
- 少なくとも一の材料層を上に有する基板を備える段階と;
少なくともレーザーとビームホモジェナイザーとを用いて均一なビームスポットを形成する段階と;
前記層と前記基板との間の界面を、実質的に一様に分布するレーザーエネルギー密度を有する前記均一なビームスポットの単パルスを用いて照射して前記層を前記基板から分離する段階と;を備えた基板から少なくとも一の材料層を分離する方法。 - 前記均一なビームスポットを形成する段階は、ロービームを前記ビームホモジェナイザーを通過させ、次いで可変アパーチャーを通過させることを含む請求項17に記載の方法。
- 前記可変アパーチャーはほぼ方形形状を有する請求項18に記載の方法。
- 前記レーザーはエキシマレーザーを含む請求項17に記載の方法。
- 前記界面を照射する段階は、ほぼ円形方向に前記層を有する前記基板を移動することを含む請求項17に記載の方法。
- 前記層を前記基板上でダイアレイに分割し、前記均一なビームスポットを整数の数の前記ダイを含むような形状にされる請求項17に記載の方法。
- 前記界面を照射する段階は、前記界面を、前記界面に対して角度を有してレーザー光に露光する段階を含む請求項17に記載の方法。
- 前記基板はサファイアウェハーであり、前記少なくとも一の材料層は少なくとも一のGaN層を含む請求項17に記載の方法。
- 前記少なくとも一の層はGaNバッファ層を含む請求項24に記載の方法。
- 前記均一なビームスポットは248nmエキシマレーザーを用いて形成される請求項25に記載の方法。
- 前記少なくとも一の層はAlNバッファ層を含む請求項24に記載の方法。
- 前記均一なビームスポットは193nmエキシマレーザーを用いて形成される請求項27に記載の方法。
- 前記照射は、前記界面に爆発衝撃波を誘起するのに十分なレーザーエネルギー密度を用いて実施し、前記爆発衝撃波は前記第1基板を前記セクションから分離する請求項17に記載の方法。
- 前記レーザーエネルギー密度は、約0.60J/cm2から1.6J/cm2の範囲である請求項29に記載の方法。
- 前記均一なビームスポットは細長ライン形状であり、前記照射段階は前記界面を前記細長ラインで走査することを含む請求項17に記載の方法。
- 少なくとも一の材料層を上に有する基板を備える段階と;
レーザーを用いて
ビームスポットを形成する段階と;
前記第1基板と前記層との間の界面を、前記ビームスポットを用いて照射する段階であって、前記界面はほぼ同心パターンで照射して前記層を前記基板から分離する段階と;を備えた基板から少なくとも一の材料層を分離する方法。 - 前記ビームスポットはほぼ多角形形状であり、前記同心パターンは螺旋パターンである請求項32に記載の方法。
- 前記ビームスポットはほぼ円形であり、前記同心パターンは螺旋パターンである請求項32に記載の方法。
- 前記ビームスポットは均一なビームスポットである32に記載の方法。
- 前記ビームスポットは可変環状ビームスポットであり、前記可変環状ビームスポットの直径は前記第1基板と前記層との間の前記界面は同心状に走査するように縮小している請求項32に記載の方法。
- 同心状に前記界面を前記照射する段階は、前記ビームスポットが前記基板に対して螺旋方向に移動するように、前記層を有する前記基板を保持するステージを移動することを含む請求項32に記載した方法。
- 少なくとも一の材料層を上に有する第1基板を備える段階と;
前記少なくとも一の材料層をエッチングして、前記少なくとも一の層を前記第1基板上にストリートによって分離された複数のセクションに分割する段階であって、前記セクションはダイに対応するところの段階と;
第2基板を前記セクションにつける段階と;
レーザーを用いて均一なビームスポットを形成する段階であって、前記均一なビームスポットは整数の数の前記セクションをカバーするような形状にされている段階と;
前記均一なビームスポットを用いて前記第1基板と前記セクションとの間の界面を照射する段階であって、前記照射は前記整数の数のセクションの各々に対して実施する段階と;
前記第1基板を前記セクションの全てから分離する段階と;を備えた基板から少なくとも一の材料層を分離する方法。 - 前記第1基板を分離した後、前記セクションを分離して前記ダイを形成する段階をさらに備えた請求項38に記載の方法。
- 前記セクションを分離する段階は、前記セクション間の前記ストリート上の前記第2基板をけがくことを含む請求項39に記載の方法。
- 前記第1基板はサファイアウェハーである請求項38に記載の方法。
- 前記少なくとも一の層はGaNを含む請求項38に記載の方法。
- 前記第2基板はモリブデン又はその合金を含む請求項38に記載の方法。
- 前記少なくとも一の材料層を上に有する第1基板を備える前記段階は、サファイア基板上に多重モノリシックGaN層を成長させることを含む請求項38に記載の方法。
- 前記少なくとも一の層に保護コーティングをつける段階と、前記少なくとも一の層をエッチング後であってかつ前記第2基板をつける前に前記保護コーティングを除去する段階とをさらに備えた請求項38に記載の方法。
- 前記均一なビームスポットは、前記レーザーによって生成されたロービームをホモジェナイザー及びアパーチャーを通すことによって形成する請求項38に記載の方法。
- 前記基板をステージ上に移動する段階と;
前記ステージの位置を所定の値と比較する段階であって、前記レーザーは前記位置に基づいてトリガーされて前記ビームスポットを形成し、前記第1基板と前記整数の数のセクションの各々との間の界面を照射する段階と;をさらに備えた請求項46に記載の方法。 - 前記レーザーはエキシマレーザーであり、前記界面を照射する段階は、前記整数の数のセクションの各々について前記界面を前記エキシマレーザーの単パルスに露光する段階を含む請求項38に記載の方法。
- 前記照射は、前記界面に爆発衝撃波を誘起するのに十分なレーザーエネルギー密度を用いて実施し、前記爆発衝撃波は前記第1基板を前記セクションから分離する請求項38に記載の方法。
- 前記エネルギー密度は約0.60J/cm2〜1.6J/cm2の範囲である請求項49に記載の方法。
- 前記第2基板をつける前に、前記セクション及び前記ストリート上に金属基板を形成する段階と;
前記セクション間の位置に少なくとも前記金属基板をカットする段階と;
前記第1基板を前記セクションから分離した後に前記金属基板の少なくとも一部を除去する段階と;をさらに備えた請求項38に記載の方法。 - 少なくとも一のGaN層を上に有する第1基板を備える段階と;
前記GaN層上に反射膜を含む少なくとも一の膜を形成する段階と;
前記少なくとも一の膜にモリブデンを含む第2基板をつける段階と;
前記第1基板と前記GaN層との間の界面を照射して、前記第1基板を前記GaN層から分離する段階と;を備えた基板から少なくとも一の材料層を分離する方法。 - 前記反射膜はアルミニウム膜である請求項52に記載の方法。
- 前記少なくとも一の層はさらに、前記アルミニウム膜上に金属膜を含み、第2基板は前記金属膜につけられた前記モリブデンを含む請求項53に記載の方法。
- 前記第2基板をつける前に、前記少なくとも一のGaN層及び前記少なくとも一の膜をエッチングして前記第1基板上にストリートによって分離された複数のダイを形成する請求項請求項52に記載の方法。
- 前記照射段階は、前記界面を、前記界面に対して角度を有してレーザー光に露光する段階を含む請求項52に記載の方法。
- 少なくとも一の材料層を上に有する第1基板を備える段階と;
前記少なくとも一の材料層に第2基板をつける段階と;
前記界面を前記界面に対して角度を有してレーザー光に露光することによって、前記第1基板と前記材料層との間の界面を照射して、前記第1基板を前記材料層から分離する段階と;を備えた基板から少なくとも一の材料層を分離する方法。
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EP1735837A2 (en) | 2006-12-27 |
TW200537606A (en) | 2005-11-16 |
EP1735837B1 (en) | 2012-05-09 |
US20050227455A1 (en) | 2005-10-13 |
WO2005094320A2 (en) | 2005-10-13 |
ATE557425T1 (de) | 2012-05-15 |
WO2005094320A3 (en) | 2006-09-28 |
KR20070013288A (ko) | 2007-01-30 |
JP5053076B2 (ja) | 2012-10-17 |
KR100849779B1 (ko) | 2008-07-31 |
EP1735837A4 (en) | 2009-11-04 |
CN1973375B (zh) | 2012-07-04 |
US7202141B2 (en) | 2007-04-10 |
US7241667B2 (en) | 2007-07-10 |
US20070298587A1 (en) | 2007-12-27 |
CN1973375A (zh) | 2007-05-30 |
US20060003553A1 (en) | 2006-01-05 |
TWI278923B (en) | 2007-04-11 |
US7846847B2 (en) | 2010-12-07 |
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