JP2007512708A - レーザによりポリシリコン薄膜をアニールする光学系 - Google Patents
レーザによりポリシリコン薄膜をアニールする光学系 Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/0818—Unstable resonators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/042—Automatically aligning the laser beam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- 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
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- 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
- B23K26/0738—Shaping the laser spot into a linear shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
- B23K26/705—Beam measuring device
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
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- H01L21/02532—Silicon, silicon germanium, germanium
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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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02656—Special treatments
- H01L21/02664—Aftertreatments
- H01L21/02667—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth
- H01L21/02675—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth using laser beams
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/22—Gases
- H01S3/223—Gases the active gas being polyatomic, i.e. containing two or more atoms
- H01S3/225—Gases the active gas being polyatomic, i.e. containing two or more atoms comprising an excimer or exciplex
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/22—Gases
- H01S3/223—Gases the active gas being polyatomic, i.e. containing two or more atoms
- H01S3/225—Gases the active gas being polyatomic, i.e. containing two or more atoms comprising an excimer or exciplex
- H01S3/2255—XeF, i.e. xenon fluoride is comprised for lasing around 351 nm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2308—Amplifier arrangements, e.g. MOPA
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2366—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media comprising a gas as the active medium
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Recrystallisation Techniques (AREA)
- Thin Film Transistor (AREA)
- Lasers (AREA)
Abstract
た細いパルス化作用ビームを発生させる光学系とを、有するガス放電レーザ結晶化装置について開示している。その装置において、レーザシステムはPOPAレーザシステムとして構成され、第1レーザPOユニットから第2レーザPAユニットに第1出力レーザ光パルスビームを方向付けるように動作されるリレー光学系と、第1レーザ出力光パルスビームの拡大として第2レーザ出力光パルスビームを発生するように、パルス又は−3nsec内で第1及び第2レーザユニットにおいてガス放電の発生のタイミングを合わせるタイミング及び制御モジュールとを更に有することが可能である。そのシステムは、発信器レーザユニットにおいて発散制御部を有することが可能である。発散性御部は不安定発振制御部を有することが可能である。そのシステムは、レーザと被加工物との中間にビームポインティング制御機構及びビーム位置制御機構を更に有することが可能である。ビームパラメータ計測法は、ビームポインティング制御機構に対するアクティブフィードバック制御部とビーム位置制御機構に対するアクティブフィードバック制御部とを与えることが可能である。
Description
“CRYSTALLIZATION PROCESSING OF SEMICONDUCTOR FILM REGIONS ON A SUBSTRATE,AND DEVICES MADE THEREWITH”と題された2001年11月27日に出願された米国特許第6,322,625号明細書と、2000年3月16日に出願された米国特許出願公開第09/526,585号明細書に基づく
“METHOD AND SYSTEM FOR PROVIDING A CONTINUOUS SEQUENTIAL LATERAL SOLIDIFICATION”と題された2002年4月9日に出願された米国特許第6,368,945号明細書と、1999年9月3日に出願された米国特許出願公開第09/390,535号明細書に基づく
“METHODS FOR PRODUCING UNIFORM LARGE−GRAINED AND GRAIN BOUNDARY LOCATION MANIPULATED POLYCRYSTAL THIN FILM SEMICONDUCTORS USING SEQUENTIAL LATERAL SOLIDFICATION”と題された2003年4月29日に出願された米国特許第6,555,449号明細書と、2001年3月30日に出願された米国特許出願公開第09/823,547号明細書に基づく
“SYSTEM FOR PROVIDING A CONTINUOUS MOTION SEQUENTIAL LATERAL SOLIDIFICATION”と題された2003年5月13日に出願された米国特許第6,563,077号明細書と、1999年9月3日に出願された米国特許出願公開第09/390,537号明細書に基づく、“SYSTEMS AND METHODS USING SEQUENTIAL LATERAL SOLIDIFICATION FOR PRODUCING SINGLE POLYCRYSTALLINE SILICON THIN FILMS AT LOW TEMPERATURES”と題された2003年6月3日に出願された米国特許第6,573,53号明細書と、2000年11月27日に出願された米国特許出願公開第09/722,778号明細書に基づく
“SPECIALIZED SUBSTRATES FOR USE IN SEQUENTIAL LATERAL SOLIDIFICATION PROCESSING”と題された2003年6月24日に出願された米国特許第6,582,827号明細書とに記載されていて、又、2002年11月13日に出願された米国特許出願公開第10/294,001号明細書に基づく
“METHODS FOR PRODUCING UNIFORM LARGE−GRAINED AND GRAIN BOUNDARY LOCATION MANIPULATED POLYCRYSTALLINE THIN FILM SEMICONDUCTORS USING SEQUENTIAL LATERAL SOLIDIFICATION”と題された2003年5月22日に出願された本発明者等による米国特許出願公開第2003/0096489A1号明細書と、2002年12月3日に出願された米国特許出願公開第10/308,958号明細書に基づく“METHOD FOR PRODUCING UNIFORM LARGE−GRAINED AND GRAIN BOUNDARY LOCATION MANIPULATED POLYCRYSTALLINE THIN FILM SEMICONDUCTORS USING SEQUENTIAL LATERAL SOLIDIFICATION”と題された2003年6月26日に出願された本発明者等による米国特許出願公開第2003/0119286A1号明細書と、に記載されている。
“mMETHOD OF MAKING A THIN FILM TRANSISTOR BY OVERLAPPING ANNEALING USING LASERS”と題された1995年7月11日に出願されたChaeによる米国特許第5,423,122号明細書と、1999年5月13日に出願された米国特許出願公開第09/311,702号明細書に基づく
“METHOD OF FABRICATING THIN FILM TRANSISTORS FOR A LIQUID CRYSTAL DISPLAY”と題された2001年1月23日に出願されたJungによる米国特許第6,177,301号明細書と、2000年6月28日に出願された米国特許出願公開第09/605,409号明細書に基づく
“LlASER ANNEALING METHOD”と題された2001年11月13日に出願されたJungによる米国特許第6,316,338号明細書と、2000年5月30日に出願された米国特許出願公開第09/583,450号明細書に基づく
“APPARATUS AND METHOD FOR LASER RADIATION”と題された2001年4月10日に出願されたYamazakiによる米国特許第6,215,595号明細書と、1995年7月19日に出願された米国特許出願公開第504087号明細書に基づく
“LASER PROCESSING METHOD”と題された2001年10月9日に出願されたZhangによる米国特許第6,300,176号明細書と、2000年9月21日に出願された米国特許出願公開第09/667,758号明細書に基づく
“METHOD OF PROCESSING LIQUID CRYSTAL DISPLAY PANEL”と題された2002年5月28日に出願されたNoguchiによる米国特許第6,396,560号明細書と、2003年6月17日に出願された米国特許出願公開第10/462,792号明細書に基づく“SEMICONDUCTOR THIN FILM AND PROCESS FOR PRODUSTION THEREOF”と題された2004年4月1日に出願されたTakeda等による米国特許出願公開第2004/0060504A1号明細書と、に記載されている。
w52de12dL1dc
ここで、wはビーム幅であることに言及している。Voutsasは又、ビームレットの最適な使用に対して、Dde→0及びdc→0であることが必要であることに言及している。又、Voutsasによると、核形成される“中心”領域は、例えば、ビームレットの幅を基本的に減少させることにより効果的に削除されることができる一方、ビームエッジ領域は限定されるが、決して、実際には削除されない。Voutsasは又、投影光学系の限定に加えて、ビームプロファイル劣化の他の原因に焦点を当てている。投影光学系のための所定の開口数に対して、例えば、レンズの撮像能力、即ち、そのレンズの分解能における本質的に無視可能は変化をもたらす照射されるサンプルの表面と投影レンズとの間の距離における変動度を規定する、焦点深度が決定される。例えば、所定の投影レンズに対して、サンプルの面の位置が焦点深度におけるこの限界を超えている場合、結像されるビームプロファイルにおいて歪みが生じ、例えば、それ自体“ぼやけ”として現れ、即ち、結像ビームは、アンダーフォーカスか又はオーバーフォーカスのどちらかを伴って、十分な分解能を有することができない。Voutsasによるそのような条件下においては、最大ビーム強度は減少し、エッジは更に拡散するようになり、例えば、急峻性の小さい勾配を有する。換言すれば、deは増加し、ビームレットの中心における核形成の確率が又、増加する。Voutsasは又、ビームプロファイルにおける増大されたエッジ拡散のために、最良の焦点面からmmの単位でデフォーカスされる度合い、例えば、デフォーカスに伴って減少する横成長の長さ、の関数としてのLGLは、横成長のために非有効なビームの増加された部分を与えることに言及している。Voutsasは、レーザフルエンスを増加させることはLGLのデフォーカスの損失を幾らか、補償することができるが、そのような補償の範囲に関しては凝集が限界をもたらし、そのことは、例えば、大きい領域に亘る横成長の継続を維持するように最適な基板ピッチを決定することにおいて、デフォーカシングのためのビームプロファイルにおける劣化が明らかにされる必要があることを示している。
by K.Lee,http://Ttftlcd.khu.ac.kr/research/poly−Si/chapter5.htmlに従ってエキシマレーザによりアニールされた(ELA)ポリシリコン薄膜の調製のためのプロセスフローを模式的に示している。図4に示すように、例えば、JSW社製のアニール装置における矩形ビーム形状を有するXeClエキシマレーザシステム(図示せず)を用いることができる。SiO2のバッファ層134はAPCVDにより清浄なガラス基板上に堆積される。70nmの厚さのアモルファスシリコン:水酸化物(”a−Si:H“)薄膜136が、ELAのための開始材料としてPECVDにより堆積される。a−Si:H薄膜は、アモルファスシリコン138の層を形成するために150mJ/cm2で94%オーバーラップスキャンを有するエキシマレーザにより脱水素される。最終的に、脱水素されたa−Si:H層138は、ポリシリコン層138を形成するために300℃において94%オーバーラップスキャンを有するELAにより結晶化される。レーザエネルギー密度は、高品質のポリシリコン薄膜138を得るために最適なレーザ強度を求めるように240乃至330mJ/cm2の範囲内で変化される。
例えば、パワーメータのカメラを用いて、例えば、ビームを測定するためのサービスツールは、手動で操作されることが可能である動作ソレノイド254によりビーム190の経路に入れられるビームスプリッタ256を用いることによりビーム処理モジュール220にビームが入る前に、ビーム190の経路に手動で入れられることが可能である。
Claims (8)
- 被加工物の薄膜における配向又は結晶成長の変換を実行するためのガス放電レーザ結晶化装置であって:
パルス間ドーズ制御を用いて高パワー及び高繰り返しレートにおいてレーザ出力光パルスビームを発生させるXeFレーザシステムを構成するMOPA又はPOPA;及び
前記レーザ出力光パルスビームから伸長された細いパルス化作用ビームを生成させる光学系;
を有することを特徴とするガス放電レーザ結晶化装置。 - 請求項1に記載のガス放電レーザ結晶化装置であって、前記レーザシステムはPOPAレーザシステムとして構成され、前記レーザシステムは:
第1レーザPOユニットから第2レーザPAユニットに第1レーザ出力光パルスビームを方向付けるように動作されるリレー光学系;及び
前記第1レーザ出力光パルスビームの拡大として第2レーザ出力光パルスビームを発生するように、前記第1及び第2レーザユニットにおけるガス放電の発生のタイミングを合わせるタイミング及び制御モジュール;
を更に有する、ことを特徴とするガス放電レーザ結晶化装置。 - 請求項1に記載のガス放電レーザ結晶化装置であって:
前記第1レーザユニットにおいて発散性御部;
を更に有する、ことを特徴とするガス放電レーザ結晶化装置。 - 請求項1に記載のガス放電レーザ結晶化装置であって:
発散制御部は不安定共振器構成を有する;
ことを特徴とするガス放電レーザ結晶化装置。 - 請求項1に記載のガス放電レーザ結晶化装置であって:
前記レーザと前記被加工物の中間にあるビームポインティング制御機構;
を更に有する、ことを特徴とするガス放電レーザ結晶化装置。 - 請求項1に記載のガス放電レーザ結晶化装置であって:
前記レーザと前記被加工物の中間にあるビーム位置制御機構;
を更に有する、ことを特徴とするガス放電レーザ結晶化装置。 - 請求項5に記載のガス放電レーザ結晶化装置であって:
前記ビームポインティング機構に対してアクティブフィードバック制御を与えるビームパラメータ計測法;
を更に有する、ことを特徴とするガス放電レーザ結晶化装置。 - 請求項6に記載のガス放電レーザ結晶化装置であって:
前記ビーム位置制御機構に対してアクティブフィードバック制御を与えるビームパラメータ計測法;
を更に有する、ことを特徴とするガス放電レーザ結晶化装置。
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JP2009540540A (ja) * | 2006-06-02 | 2009-11-19 | サイマー インコーポレイテッド | ハイパワーレーザフラットパネル加工物処理システムコントローラ |
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US20050141580A1 (en) | 2005-06-30 |
WO2005054949A3 (en) | 2005-12-15 |
US7061959B2 (en) | 2006-06-13 |
JP2012191221A (ja) | 2012-10-04 |
EP1687877B1 (en) | 2016-09-21 |
WO2005054949A2 (en) | 2005-06-16 |
EP1687877A2 (en) | 2006-08-09 |
EP1687877A4 (en) | 2008-10-08 |
JP2017139487A (ja) | 2017-08-10 |
KR101115077B1 (ko) | 2012-02-28 |
KR20060126665A (ko) | 2006-12-08 |
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