公开(公告)号：US20120298838A1

公开(公告)日：2012-11-29

申请号：US13571129

申请日：2012-08-09

申请人： Palash P. Das ,  Thomas Hofmann ,  Jesse D. Davis ,  Richard L. Sandstrom

发明人： Palash P. Das ,  Thomas Hofmann ,  Jesse D. Davis ,  Richard L. Sandstrom

IPC分类号： G01J1/16

CPC分类号： B23K26/043 ,  B23K26/04 ,  B23K26/0622 ,  B23K26/0738 ,  C30B1/023 ,  C30B13/24

摘要： A laser crystallization apparatus and method are disclosed for selectively melting a film such as amorphous silicon that is deposited on a substrate. The apparatus may comprise an optical system for producing stretched laser pulses for use in melting the film. In still another aspect of an embodiment of the present invention, a system and method are provided for stretching a laser pulse. In another aspect, a system is provided for maintaining a divergence of a pulsed laser beam (stretched or non-stretched) at a location along a beam path within a predetermined range. In another aspect, a system may be provided for maintaining the energy density at a film within a predetermined range during an interaction of the film with a shaped line beam.

摘要翻译： 公开了一种激光结晶装置和方法，用于选择性地熔融沉积在基底上的诸如非晶硅的膜。 该装置可以包括用于产生用于熔化膜的拉伸激光脉冲的光学系统。 在本发明实施例的另一方面，提供一种用于拉伸激光脉冲的系统和方法。 在另一方面，提供了一种系统，用于在预定范围内沿着光束路径的位置维持脉冲激光束的发散（拉伸或未拉伸）。 在另一方面，可以提供一种系统，用于在膜与成形线束的相互作用期间将膜处的能量密度保持在预定范围内。

公开(公告)号：US20090256057A1

公开(公告)日：2009-10-15

申请号：US12386771

申请日：2009-04-21

申请人： Palash P. Das ,  Thomas Hofmann ,  Jesse D. Davis ,  Richard L. Sandstrom

发明人： Palash P. Das ,  Thomas Hofmann ,  Jesse D. Davis ,  Richard L. Sandstrom

IPC分类号： G02B27/40 ,  G01B9/00

CPC分类号： B23K26/043 ,  B23K26/04 ,  B23K26/0622 ,  B23K26/0738 ,  C30B1/023 ,  C30B13/24

摘要： A laser crystallization apparatus and method are disclosed for selectively melting a film such as amorphous silicon that is deposited on a substrate. The apparatus may comprise an optical system for producing stretched laser pulses for use in melting the film. In still another aspect of an embodiment of the present invention, a system and method are provided for stretching a laser pulse. In another aspect, a system is provided for maintaining a divergence of a pulsed laser beam (stretched or non-stretched) at a location along a beam path within a predetermined range. In another aspect, a system may be provided for maintaining the energy density at a film within a predetermined range during an interaction of the film with a shaped line beam.

摘要翻译： 公开了一种激光结晶装置和方法，用于选择性地熔融沉积在基底上的诸如非晶硅的膜。 该装置可以包括用于产生用于熔化膜的拉伸激光脉冲的光学系统。 在本发明实施例的另一方面，提供一种用于拉伸激光脉冲的系统和方法。 在另一方面，提供了一种系统，用于在预定范围内沿着光束路径的位置维持脉冲激光束的发散（拉伸或未拉伸）。 在另一方面，可以提供一种系统，用于在膜与成形线束的相互作用期间将膜处的能量密度保持在预定范围内。

公开(公告)号：US08737438B2

公开(公告)日：2014-05-27

申请号：US13571129

申请日：2012-08-09

申请人： Palash P. Das ,  Thomas Hofmann ,  Jesse D. Davis ,  Richard L. Sandstrom

发明人： Palash P. Das ,  Thomas Hofmann ,  Jesse D. Davis ,  Richard L. Sandstrom

IPC分类号： H01S3/10

CPC分类号： B23K26/043 ,  B23K26/04 ,  B23K26/0622 ,  B23K26/0738 ,  C30B1/023 ,  C30B13/24

摘要： A laser crystallization apparatus and method are disclosed for selectively melting a film such as amorphous silicon that is deposited on a substrate. The apparatus may comprise an optical system for producing stretched laser pulses for use in melting the film. In still another aspect of an embodiment of the present invention, a system and method are provided for stretching a laser pulse. In another aspect, a system is provided for maintaining a divergence of a pulsed laser beam (stretched or non-stretched) at a location along a beam path within a predetermined range. In another aspect, a system may be provided for maintaining the energy density at a film within a predetermined range during an interaction of the film with a shaped line beam.

摘要翻译： 公开了一种激光结晶装置和方法，用于选择性地熔融沉积在基底上的诸如非晶硅的膜。 该装置可以包括用于产生用于熔化膜的拉伸激光脉冲的光学系统。 在本发明实施例的另一方面，提供一种用于拉伸激光脉冲的系统和方法。 在另一方面，提供了一种系统，用于在预定范围内沿着光束路径的位置维持脉冲激光束的发散（拉伸或未拉伸）。 在另一方面，可以提供一种系统，用于在膜与成形线束的相互作用期间将膜处的能量密度保持在预定范围内。

公开(公告)号：US08265109B2

公开(公告)日：2012-09-11

申请号：US12386771

申请日：2009-04-21

申请人： Palash P. Das ,  Thomas Hofmann ,  Jesse D. Davis ,  Richard L. Sandstrom

发明人： Palash P. Das ,  Thomas Hofmann ,  Jesse D. Davis ,  Richard L. Sandstrom

IPC分类号： H01S3/10

CPC分类号： B23K26/043 ,  B23K26/04 ,  B23K26/0622 ,  B23K26/0738 ,  C30B1/023 ,  C30B13/24

摘要： A laser crystallization apparatus and method are disclosed for selectively melting a film such as amorphous silicon that is deposited on a substrate. The apparatus may comprise an optical system for producing stretched laser pulses for use in melting the film. In still another aspect of an embodiment of the present invention, a system and method are provided for stretching a laser pulse. In another aspect, a system is provided for maintaining a divergence of a pulsed laser beam (stretched or non-stretched) at a location along a beam path within a predetermined range. In another aspect, a system may be provided for maintaining the energy density at a film within a predetermined range during an interaction of the film with a shaped line beam.

摘要翻译： 公开了一种激光结晶装置和方法，用于选择性地熔融沉积在基底上的诸如非晶硅的膜。 该装置可以包括用于产生用于熔化膜的拉伸激光脉冲的光学系统。 在本发明实施例的另一方面，提供一种用于拉伸激光脉冲的系统和方法。 在另一方面，提供了一种系统，用于在预定范围内沿着光束路径的位置维持脉冲激光束的发散（拉伸或未拉伸）。 在另一方面，可以提供一种系统，用于在膜与成形线束的相互作用期间将膜处的能量密度保持在预定范围内。

公开(公告)号：US6128323A

公开(公告)日：2000-10-03

申请号：US157067

申请日：1998-09-18

申请人： David W. Myers ,  Herve A. Besaucele ,  Palash P. Das ,  Thomas P. Duffey ,  Alexander I. Ershov ,  Igor V. Fomenkov ,  Thomas Hofmann ,  Richard G. Morton ,  Richard M. Ness ,  Peter C. Newman ,  Robert G. Ozarski ,  Gamaralalage G. Padmabandu ,  William N. Partlo ,  Daniel A. Rothweil ,  Richard L. Sandstrom ,  Paul S. Thompson ,  Richard C. Ujazdowski ,  Tom A. Watson ,  R. Kyle Webb ,  Paolo Zambon

发明人： David W. Myers ,  Herve A. Besaucele ,  Palash P. Das ,  Thomas P. Duffey ,  Alexander I. Ershov ,  Igor V. Fomenkov ,  Thomas Hofmann ,  Richard G. Morton ,  Richard M. Ness ,  Peter C. Newman ,  Robert G. Ozarski ,  Gamaralalage G. Padmabandu ,  William N. Partlo ,  Daniel A. Rothweil ,  Richard L. Sandstrom ,  Paul S. Thompson ,  Richard C. Ujazdowski ,  Tom A. Watson ,  R. Kyle Webb ,  Paolo Zambon

IPC分类号： G03F7/20 ,  H01S3/02 ,  H01S3/03 ,  H01S3/036 ,  H01S3/041 ,  H01S3/08 ,  H01S3/081 ,  H01S3/097 ,  H01S3/0971 ,  H01S3/1055 ,  H01S3/134 ,  H01S3/139 ,  H01S3/225 ,  H03K3/57 ,  H03K17/80 ,  H01S3/00

CPC分类号： G03F7/70025 ,  G03F7/70041 ,  G03F7/70358 ,  G03F7/70558 ,  G03F7/70575 ,  H01S3/02 ,  H01S3/03 ,  H01S3/036 ,  H01S3/041 ,  H01S3/097 ,  H01S3/0971 ,  H01S3/1055 ,  H01S3/134 ,  H01S3/225 ,  H03K17/80 ,  H03K3/57 ,  H01S3/08009 ,  H01S3/0812 ,  H01S3/1392 ,  H01S3/2251 ,  H01S3/2256

摘要： The present invention provides a reliable modular production quality excimer laser capable of producing 10 mJ laser pulses at 2000 Hz with a full width half, maximum bandwidth of about 0.6 pm or less. Replaceable modules include a laser chamber; a pulse power system comprised of three modules; an optical resonator comprised of a line narrowing module and an output coupler module; a wavemeter module, an electrical control module, a cooling water module and a gas control module. Improvements in the laser chamber permitting the higher pulse rates and improved bandwidth performance include a single upstream preionizer tube and a high efficiency chamber. The chamber is designed for operation at lower fluorine concentration. Important improvements have been provided in the pulse power unit to produce faster rise time and improved pulse energy control. These improvements include an increased capacity high voltage power supply with a voltage bleed-down circuit for precise voltage trimming, an improved commutation module that generates a high voltage pulse from the capacitors charged by the high voltage power supply and amplifies the pulse voltage 23 times with a very fast voltage transformer having a secondary winding consisting of a single four-segment stainless steel rod. A novel design for the compression head saturable inductor greatly reduces the quantity of transformer oil required and virtually eliminates the possibility of oil leakage which in the past has posed a hazard.

摘要翻译： 本发明提供了一种可靠的模块化生产质量准分子激光器，其能够在2000Hz下产生10mJ激光脉冲，全宽度为一半，最大带宽为约0.6μm或更小。 可更换模块包括激光室; 由三个模块组成的脉冲电源系统; 光学谐振器，包括线窄模块和输出耦合器模块; 波形计模块，电气控制模块，冷却水模块和气体控制模块。 允许更高脉冲速率和改进的带宽性能的激光室的改进包括单个上游预分解器管和高效室。 该室设计用于在较低的氟浓度下运行。 在脉冲功率单元中已经提供了重要的改进，以产生更快的上升时间和改进的脉冲能量控制。 这些改进包括增加容量的高压电源，具有用于精确电压调整的电压降低电路，改进的换向模块，其从由高压电源充电的电容器产生高电压脉冲，并用脉冲电压放大23次 具有由单个四段不锈钢棒组成的次级绕组的非常快速的电压互感器。 用于压缩头可饱和电感器的新颖设计大大减少了所需的变压器油的数量，并且几乎消除了过去漏油的可能性。

公开(公告)号：USRE38054E1

公开(公告)日：2003-04-01

申请号：US09801383

申请日：2001-03-07

申请人： Thomas Hofmann ,  Jean-Marc Hueber ,  Palash P. Das ,  Toshihiko Ishihara ,  Thomas P. Duffey ,  John T. Melchior ,  Herve A. Besaucele ,  Richard G. Morton ,  Richard M. Ness ,  Peter C. Newman ,  William N. Partlo ,  Daniel A. Rothweil ,  Richard L. Sandstrom

发明人： Thomas Hofmann ,  Jean-Marc Hueber ,  Palash P. Das ,  Toshihiko Ishihara ,  Thomas P. Duffey ,  John T. Melchior ,  Herve A. Besaucele ,  Richard G. Morton ,  Richard M. Ness ,  Peter C. Newman ,  William N. Partlo ,  Daniel A. Rothweil ,  Richard L. Sandstrom

IPC分类号： H01S310

CPC分类号： C23C14/225 ,  C23C14/0694 ,  C23C14/16 ,  C23C14/24 ,  G01J9/00 ,  G02B1/105 ,  G02B5/1852 ,  G03F7/70025 ,  G03F7/70041 ,  G03F7/70358 ,  G03F7/70558 ,  G03F7/70575 ,  H01S3/02 ,  H01S3/03 ,  H01S3/036 ,  H01S3/08009 ,  H01S3/097 ,  H01S3/0971 ,  H01S3/1055 ,  H01S3/134 ,  H01S3/1392 ,  H01S3/223 ,  H01S3/225 ,  H01S3/2251 ,  H01S3/2256 ,  H03K3/57 ,  H03K17/80

摘要： The present invention provides a reliable modular production quality excimer laser capable of producing 10 mJ laser pulses in the range of 1000 Hz to 2000 Hz or greater. Replaceable modules include a laser chamber; a pulse power system comprised of three modules; an optical resonator comprised of a line narrowing module and an output coupler module; a wavemeter module, an electrical control module, a cooling water module and a gas control module. Important improvements have been provided in the pulse power unit to produce faster rise time and improved pulse energy control. These improvements include an increased capacity high voltage power supply with a voltage bleed-down circuit for precise voltage trimming, an improved communication module that generates a high voltage pulse from the capacitors charged by the high voltage power supply and amplifies the pulse voltage 23 times with a very fast voltage transformer having a secondary winding consisting of a single four-segment stainless steel rod. A novel design for the compression head saturable inductor greatly reduces the quantity of transformer oil required and virtually eliminates the possibility of oil leakage which in the past has posed a hazard.

摘要翻译： 本发明提供了可产生1000Hz至2000Hz或更大范围内的10mJ激光脉冲的可靠的模块化生产质量准分子激光器。 可更换模块包括激光室; 由三个模块组成的脉冲电源系统; 光学谐振器，包括线窄模块和输出耦合器模块; 波形计模块，电气控制模块，冷却水模块和气体控制模块。 在脉冲功率单元中已经提供了重要的改进，以产生更快的上升时间和改进的脉冲能量控制。 这些改进包括具有用于精确调整电压的电压降低电路的增加容量的高压电源，改进的通信模块，其从由高压电源充电的电容器产生高电压脉冲，并用脉冲电压放大23次 具有由单个四段不锈钢棒组成的次级绕组的非常快速的电压互感器。 用于压缩头可饱和电感器的新颖设计大大减少了所需的变压器油的数量，并且几乎消除了过去漏油的可能性。

公开(公告)号：US6018537A

公开(公告)日：2000-01-25

申请号：US273446

申请日：1999-03-19

申请人： Thomas Hofmann ,  Jean-Marc Hueber ,  Palash P. Das ,  Toshihiko Ishihara ,  Thomas P. Duffey ,  John T. Melchior ,  Herve A. Besaucele ,  Richard G. Morton ,  Richard M. Ness ,  Peter C. Newman ,  William N. Partlo ,  Daniel A. Rothweil ,  Richard L. Sandstrom

发明人： Thomas Hofmann ,  Jean-Marc Hueber ,  Palash P. Das ,  Toshihiko Ishihara ,  Thomas P. Duffey ,  John T. Melchior ,  Herve A. Besaucele ,  Richard G. Morton ,  Richard M. Ness ,  Peter C. Newman ,  William N. Partlo ,  Daniel A. Rothweil ,  Richard L. Sandstrom

IPC分类号： G01J9/00 ,  G03F7/20 ,  H01S3/02 ,  H01S3/03 ,  H01S3/036 ,  H01S3/08 ,  H01S3/0971 ,  H01S3/134 ,  H01S3/223 ,  H01S3/225 ,  H01S3/10

CPC分类号： G03F7/70025 ,  G01J9/00 ,  G03F7/70041 ,  G03F7/70358 ,  G03F7/70558 ,  G03F7/70575 ,  H01S3/02 ,  H01S3/03 ,  H01S3/036 ,  H01S3/0971 ,  H01S3/134 ,  H01S3/223 ,  H01S3/225 ,  H01S3/08009 ,  H01S3/09713 ,  H01S3/2251 ,  H01S3/2256

摘要： The present invention provides a reliable modular production quality excimer laser capable of producing 10 mJ laser pulses in the range of 1000 Hz to 2000 Hz or greater. Replaceable modules include a laser chamber; a pulse power system comprised of three modules; an optical resonator comprised of a line narrowing module and an output coupler module; a wavemeter module, an electrical control module, a cooling water module and a gas control module. Important improvements have been provided in the pulse power unit to produce faster rise time and improved pulse energy control. These improvements include an increased capacity high voltage power supply with a voltage bleed-down circuit for precise voltage trimming, an improved commutation module that generates a high voltage pulse from the capacitors charged by the high voltage power supply and amplifies the pulse voltage 23 times with a very fast voltage transformer having a secondary winding consisting of a single four-segment stainless steel rod. A novel design for the compression head saturable inductor greatly reduces the quantity of transformer oil required and virtually eliminates the possibility of oil leakage which in the past has posed a hazard.

摘要翻译： 本发明提供了可产生1000Hz至2000Hz或更大范围内的10mJ激光脉冲的可靠的模块化生产质量准分子激光器。 可更换模块包括激光室; 由三个模块组成的脉冲电源系统; 光学谐振器，包括线窄模块和输出耦合器模块; 波形计模块，电气控制模块，冷却水模块和气体控制模块。 在脉冲功率单元中已经提供了重要的改进，以产生更快的上升时间和改进的脉冲能量控制。 这些改进包括增加容量的高压电源，具有用于精确电压调整的电压降低电路，改进的换向模块，其从由高压电源充电的电容器产生高电压脉冲，并用脉冲电压放大23次 具有由单个四段不锈钢棒组成的次级绕组的非常快速的电压互感器。 用于压缩头可饱和电感器的新颖设计大大减少了所需的变压器油的数量，并且几乎消除了过去漏油的可能性。

公开(公告)号：US07415056B2

公开(公告)日：2008-08-19

申请号：US11394512

申请日：2006-03-31

申请人： Palash P. Das ,  Thomas Hofmann ,  Gang Lei

发明人： Palash P. Das ,  Thomas Hofmann ,  Gang Lei

IPC分类号： H01S3/22

CPC分类号： H01S3/0057 ,  G03F7/7055 ,  H01S3/225

摘要： A gas discharge laser system producing a laser output pulse and a method of operating such a system is disclosed which may comprise a pulse stretcher which may comprise a laser output pulse optical delay initiating optic directing a portion of the laser output pulse along a laser system output pulse optical axis and diverting a portion of the output pulse into an optical delay having an optical delay path and which may comprise a plurality of confocal resonators in series aligned to deliver an output of the optical delay to the laser output pulse optical delay initiating optic; an optical axis alignment mechanism comprising an radial mirror positioning mechanism operable to position the output of the optical delay to the align with the portion of the laser output pulse transmitted along the optical axis of the portion of the laser system output pulse transmitted by the laser output pulse optical delay initiating optic.

摘要翻译： 公开了一种产生激光输出脉冲的气体放电激光器系统和一种操作这种系统的方法，其可以包括脉冲展宽器，其可以包括激光输出脉冲光学延迟启动光学器件，以将激光输出脉冲的一部分沿着激光系统输出 脉冲光轴并将输出脉冲的一部分转换成具有光学延迟路径的光学延迟，并且可以包括串联对准的多个共焦谐振器，以将光学延迟的输出传递到激光输出脉冲光学延迟启动光学器件; 光轴对准机构，其包括径向镜定位机构，其可操作以将光学延迟的输出定位成与激光输出脉冲的沿激光输出脉冲发射的激光系统输出脉冲部分的光轴传输的部分对准 脉冲光学延迟启动光学器件。

公开(公告)号：US5982800A

公开(公告)日：1999-11-09

申请号：US947474

申请日：1997-10-10

申请人： Toshihiko Ishihara ,  Thomas Hofmann ,  Palash P. Das ,  Alexander I. Ershov

发明人： Toshihiko Ishihara ,  Thomas Hofmann ,  Palash P. Das ,  Alexander I. Ershov

IPC分类号： H01S3/038 ,  G03F7/20 ,  H01S3/03 ,  H01S3/034 ,  H01S3/036 ,  H01S3/08 ,  H01S3/081 ,  H01S3/0971 ,  H01S3/134 ,  H01S3/225 ,  H01S3/22

CPC分类号： G03F7/70025 ,  G03F7/70041 ,  G03F7/70216 ,  G03F7/70558 ,  G03F7/70575 ,  H01S3/03 ,  H01S3/134 ,  H01S3/225 ,  H01S3/036 ,  H01S3/08009 ,  H01S3/0812 ,  H01S3/09713 ,  H01S3/2251 ,  H01S3/2256

摘要： A very narrow band pulse excimer laser capable of producing pulses at a rate in the range of about 500 to 2000 Hz with enhanced energy dose control and reproducibility. A prior art burst mode "slug effect" occuring at one gas circulation time after the beginning of a burst of pulses is eliminated by the addition of a minute quantity of oxygen. In a preferred embodiment very narrow bandwidth is achieved by reducing fluorine partial pressure to less than 0.10 percent and by increasing the reflectance of the output coupler to greater than 25 percent. In a preferred embodiment, prior art fused silica beam expansion prisms used in the prior art line narrowing module were replaced with calcium fluoride prisms.

摘要翻译： 能够以增加的能量剂量控制和再现性，以约500至2000Hz范围内的速率产生脉冲的非常窄带脉冲准分子激光器。 通过添加微量的氧来消除在脉冲脉冲开始之后的一个气体循环时间发生的现有技术的脉冲模式“塞子效应”。 在优选实施例中，通过将氟分压降低到小于0.10％并通过将输出耦合器的反射率增加到大于25％来实现非常窄的带宽。 在优选的实施方案中，现有技术中用于现有技术的线窄化模块的熔融石英束膨胀棱镜被氟化钙棱镜替代。

公开(公告)号：US07277188B2

公开(公告)日：2007-10-02

申请号：US11138175

申请日：2005-05-26

申请人： Palash P. Das ,  Thomas Hofmann ,  Otto Boucky ,  Ernst Stump ,  Berthold Matzkovits ,  Michael Hoell ,  Joerg Walther ,  Kurt Brenner ,  Guenter Grupp

发明人： Palash P. Das ,  Thomas Hofmann ,  Otto Boucky ,  Ernst Stump ,  Berthold Matzkovits ,  Michael Hoell ,  Joerg Walther ,  Kurt Brenner ,  Guenter Grupp

IPC分类号： G01B11/14

CPC分类号： B23K26/03 ,  B23K26/0006 ,  B23K26/032 ,  B23K26/04 ,  B23K26/043 ,  B23K26/0622 ,  B23K26/0665 ,  B23K26/0738 ,  B23K26/083 ,  B23K26/352 ,  B23K37/0408 ,  B23K37/047 ,  B23K2101/18 ,  B23K2101/38 ,  B23K2103/56 ,  C30B13/22 ,  C30B29/06 ,  G01B21/00 ,  G03F7/70383 ,  G03F7/70583 ,  H01L27/1296

摘要： Systems and methods are disclosed for focusing a beam for an interaction with a film deposited on a substrate wherein the focused beam defines a short axis and a long axis. In one aspect, the system may include a detecting system to analyze light reflected from the film on an image plane to determine whether the beam is focused in the short axis at the film. In still another aspect, a system may be provided for positioning a film (having an imperfect, non-planar surface) for interaction with a shaped line beam.

摘要翻译： 公开的系统和方法用于聚焦用于与沉积在基板上的膜相互作用的光束，其中聚焦光束限定短轴和长轴。 在一个方面，系统可以包括检测系统，以分析在图像平面上从胶片反射的光，以确定光束是否在胶片的短轴中聚焦。 在另一方面，可以提供一种用于定位用于与成形线束相互作用的胶片（具有不完美的非平面表面）的系统。