公开(公告)号：US20100046561A1

公开(公告)日：2010-02-25

申请号：US12605989

申请日：2009-10-26

申请人： Keith Grant ,  Steve Stone ,  Brady Nilsen

发明人： Keith Grant ,  Steve Stone ,  Brady Nilsen

IPC分类号： H01S3/11 ,  H01S3/10

CPC分类号： H01S3/117 ,  B23K26/0622 ,  B23K26/0624 ,  B23K26/0853 ,  B23K26/40 ,  B23K2101/36 ,  B23K2103/50 ,  H01S3/10 ,  H01S3/10038 ,  H01S3/10069 ,  H01S3/1024 ,  H01S3/1611 ,  H01S3/1673 ,  H05K3/0026 ,  H05K3/0038

摘要： A laser processes a workpiece with laser pulses delivered at random time intervals and at substantially constant energy levels by characterizing the laser cavity discharge behavior and utilizing that information for adjusting dummy pulse time periods to compensate for the energy errors. Dummy pulses are laser pulses that are blocked from reaching a workpiece. A second way for providing constant pulse energies employs an AOM for varying amounts of laser energy passed to the workpiece. A third way of providing constant pulse energies entails extending the pulse period of selected pulses to allow additional laser cavity charging time whenever a dummy pulse is initiated.

摘要翻译： 激光通过表征激光腔排放行为并利用该信息调整虚拟脉冲时间周期来补偿能量误差，以随机时间间隔和基本上恒定的能量级别递送的激光脉冲来处理工件。 虚拟脉冲是被阻止到达工件的激光脉冲。 提供恒定脉冲能量的第二种方法使用AOM来改变传递给工件的激光能量。 提供恒定脉冲能量的第三种方式需要延长所选脉冲的脉冲周期，以便每当启动虚拟脉冲时，允许额外的激光腔充电时间。

公开(公告)号：US20060029113A1

公开(公告)日：2006-02-09

申请号：US10931460

申请日：2004-08-31

申请人： Brady Nilsen ,  Steve Stone

发明人： Brady Nilsen ,  Steve Stone

IPC分类号： H01S3/11 ,  H01S3/10

CPC分类号： B23K26/0853 ,  B23K26/032 ,  B23K26/042 ,  B23K26/046 ,  B23K26/0622 ,  H01S3/0085

摘要： A method and system decrease the amount of undesired laser radiation reaching a workpiece from a laser having a laser cavity and a Q-switch. The laser operates at any given time in one of at least two modes. In a first mode the laser emits pulses at a PRF (pulse repetition frequency) for selectively irradiating targets on or within a workpiece, and the pulses propagate along a propagation path to the workpiece. In a second mode less or no laser radiation desirably reaches the workpiece. The method is operable during the second mode. The method opens the Q switch more than the Q switch is open in the first mode, thereby limiting the amount of energy that builds up in the laser cavity and decreasing the peak energy of the laser radiation emitted in the second mode.

摘要翻译： 一种方法和系统减少从具有激光腔和Q开关的激光到达工件的不需要的激光辐射的量。 激光在任何​​给定的时间以至少两种模式之一操作。 在第一模式中，激光器以PRF（脉冲重复频率）发射脉冲，用于选择性地在工件上或在工件上照射靶，并且脉冲沿着传播路径传播到工件。 在第二模式中，较少或根本没有激光辐射到达工件。 该方法在第二模式期间可操作。 该方法比第一模式中的Q开关更多地打开Q开关，从而限制在激光腔中积聚的能量的量并且降低在第二模式中发射的激光辐射的峰值能量。

公开(公告)号：US20050100062A1

公开(公告)日：2005-05-12

申请号：US10997586

申请日：2004-11-24

申请人： Keith Grant ,  Steve Stone ,  Brady Nilsen

发明人： Keith Grant ,  Steve Stone ,  Brady Nilsen

IPC分类号： H01S3/11

CPC分类号： H01S3/117 ,  B23K26/0622 ,  B23K26/0624 ,  B23K26/0853 ,  B23K26/40 ,  B23K2101/36 ,  B23K2103/50 ,  H01S3/10 ,  H01S3/10038 ,  H01S3/10069 ,  H01S3/1024 ,  H01S3/1611 ,  H01S3/1673 ,  H05K3/0026 ,  H05K3/0038

摘要： A laser processes a workpiece with laser pulses delivered at random time intervals and at substantially constant energy levels by characterizing the laser cavity discharge behavior and utilizing that information for adjusting dummy pulse time periods to compensate for the energy errors. Dummy pulses are laser pulses that are blocked from reaching a workpiece. A second way for providing constant pulse energies employs an AOM for varying amounts of laser energy passed to the workpiece. A third way of providing constant pulse energies entails extending the pulse period of selected pulses to allow additional laser cavity charging time whenever a dummy pulse is initiated.

摘要翻译： 激光通过表征激光腔排放行为并利用该信息调整虚拟脉冲时间周期来补偿能量误差，以随机时间间隔和基本上恒定的能量级别递送的激光脉冲处理工件。 虚拟脉冲是被阻止到达工件的激光脉冲。 提供恒定脉冲能量的第二种方法使用AOM来改变传递给工件的激光能量。 提供恒定脉冲能量的第三种方式需要延长所选脉冲的脉冲周期，以便每当启动虚拟脉冲时，允许额外的激光腔充电时间。

公开(公告)号：US08081668B2

公开(公告)日：2011-12-20

申请号：US12605989

申请日：2009-10-26

申请人： Keith Grant ,  Steve Stone ,  Brady Nilsen

发明人： Keith Grant ,  Steve Stone ,  Brady Nilsen

IPC分类号： H01S3/10

CPC分类号： H01S3/117 ,  B23K26/0622 ,  B23K26/0624 ,  B23K26/0853 ,  B23K26/40 ,  B23K2101/36 ,  B23K2103/50 ,  H01S3/10 ,  H01S3/10038 ,  H01S3/10069 ,  H01S3/1024 ,  H01S3/1611 ,  H01S3/1673 ,  H05K3/0026 ,  H05K3/0038

摘要： A laser processes a workpiece with laser pulses delivered at random time intervals and at substantially constant energy levels by characterizing the laser cavity discharge behavior and utilizing that information for adjusting dummy pulse time periods to compensate for the energy errors. Dummy pulses are laser pulses that are blocked from reaching a workpiece. A second way for providing constant pulse energies employs an AOM for varying amounts of laser energy passed to the workpiece. A third way of providing constant pulse energies entails extending the pulse period of selected pulses to allow additional laser cavity charging time whenever a dummy pulse is initiated.

摘要翻译： 激光通过表征激光腔排放行为并利用该信息调整虚拟脉冲时间周期来补偿能量误差，以随机时间间隔和基本上恒定的能量级别递送的激光脉冲来处理工件。 虚拟脉冲是被阻止到达工件的激光脉冲。 提供恒定脉冲能量的第二种方法使用AOM来改变传递给工件的激光能量。 提供恒定脉冲能量的第三种方式需要延长所选脉冲的脉冲周期，以便每当启动虚拟脉冲时，允许额外的激光腔充电时间。

公开(公告)号：US07616669B2

公开(公告)日：2009-11-10

申请号：US10997586

申请日：2004-11-24

申请人： Keith Grant ,  Steve Stone ,  Brady Nilsen

发明人： Keith Grant ,  Steve Stone ,  Brady Nilsen

IPC分类号： H01S3/11

CPC分类号： H01S3/117 ,  B23K26/0622 ,  B23K26/0624 ,  B23K26/0853 ,  B23K26/40 ,  B23K2101/36 ,  B23K2103/50 ,  H01S3/10 ,  H01S3/10038 ,  H01S3/10069 ,  H01S3/1024 ,  H01S3/1611 ,  H01S3/1673 ,  H05K3/0026 ,  H05K3/0038

摘要： A laser processes a workpiece with laser pulses delivered at random time intervals and at substantially constant energy levels by characterizing the laser cavity discharge behavior and utilizing that information for adjusting dummy pulse time periods to compensate for the energy errors. Dummy pulses are laser pulses that are blocked from reaching a workpiece. A second way for providing constant pulse energies employs an AOM for varying amounts of laser energy passed to the workpiece. A third way of providing constant pulse energies entails extending the pulse period of selected pulses to allow additional laser cavity charging time whenever a dummy pulse is initiated.

摘要翻译： 激光通过表征激光腔排放行为并利用该信息调整虚拟脉冲时间周期来补偿能量误差，以随机时间间隔和基本上恒定的能量级别递送的激光脉冲来处理工件。 虚拟脉冲是被阻止到达工件的激光脉冲。 提供恒定脉冲能量的第二种方法使用AOM来改变传递给工件的激光能量。 提供恒定脉冲能量的第三种方式需要延长所选脉冲的脉冲周期，以便每当启动虚拟脉冲时，允许额外的激光腔充电时间。

公开(公告)号：US07372878B2

公开(公告)日：2008-05-13

申请号：US10931460

申请日：2004-08-31

申请人： Brady Nilsen ,  Steve Stone

发明人： Brady Nilsen ,  Steve Stone

IPC分类号： H01S3/10

CPC分类号： B23K26/0853 ,  B23K26/032 ,  B23K26/042 ,  B23K26/046 ,  B23K26/0622 ,  H01S3/0085

摘要： A method and system decrease the amount of undesired laser radiation reaching a workpiece from a laser having a laser cavity and a Q-switch. The laser operates at any given time in one of at least two modes. In a first mode the laser emits pulses at a PRF (pulse repetition frequency) for selectively irradiating targets on or within a workpiece, and the pulses propagate along a propagation path to the workpiece. In a second mode less or no laser radiation desirably reaches the workpiece. The method is operable during the second mode. The method opens the Q switch more than the Q switch is open in the first mode, thereby limiting the amount of energy that builds up in the laser cavity and decreasing the peak energy of the laser radiation emitted in the second mode.

摘要翻译： 一种方法和系统减少从具有激光腔和Q开关的激光到达工件的不需要的激光辐射的量。 激光在任何​​给定的时间以至少两种模式之一操作。 在第一模式中，激光器以PRF（脉冲重复频率）发射脉冲，用于选择性地在工件上或在工件上照射靶，并且脉冲沿着传播路径传播到工件。 在第二模式中，较少或根本没有激光辐射到达工件。 该方法在第二模式期间可操作。 该方法比第一模式中的Q开关更多地打开Q开关，从而限制在激光腔中积聚的能量的量并且降低在第二模式中发射的激光辐射的峰值能量。

公开(公告)号：US08383982B2

公开(公告)日：2013-02-26

申请号：US11980872

申请日：2007-10-30

申请人： Kelly J. Bruland ,  Stephen N. Swaringen ,  Brian W. Baird ,  Ho Wai Lo ,  David Martin Hemenway ,  Brady Nilsen ,  Clint Vandergiessen

发明人： Kelly J. Bruland ,  Stephen N. Swaringen ,  Brian W. Baird ,  Ho Wai Lo ,  David Martin Hemenway ,  Brady Nilsen ,  Clint Vandergiessen

IPC分类号： B23K26/38 ,  B23K26/067

CPC分类号： H01L23/5258 ,  B23K26/042 ,  B23K26/0613 ,  B23K26/067 ,  H01L2924/0002 ,  H01L2924/00

摘要： Methods and systems selectively irradiate structures on or within a semiconductor substrate using multiple laser beams. The structures may be laser-severable conductive links, and the purpose of the irradiation may be to sever selected links.

摘要翻译： 方法和系统使用多个激光束选择性地照射半导体衬底上或其中的结构。 结构可以是激光可分割的导电连接，并且照射的目的可以是切断所选择的连接。

公开(公告)号：US08358671B2

公开(公告)日：2013-01-22

申请号：US13186323

申请日：2011-07-19

申请人： Brian W. Baird ,  Kelly J. Bruland ,  Clint R. Vandergiessen ,  Mark A. Unrath ,  Brady Nilsen ,  Steve Swaringen

发明人： Brian W. Baird ,  Kelly J. Bruland ,  Clint R. Vandergiessen ,  Mark A. Unrath ,  Brady Nilsen ,  Steve Swaringen

IPC分类号： H01S3/10 ,  B23K26/00

CPC分类号： H01S3/0007 ,  B23K26/042 ,  B23K26/0622 ,  B23K26/0853

摘要： Processing a workpiece with a laser includes generating laser pulses at a first pulse repetition frequency. The first pulse repetition frequency provides reference timing for coordination of a beam positioning system and one or more cooperating beam position compensation elements to align beam delivery coordinates relative to the workpiece. The method also includes, at a second pulse repetition frequency that is lower than the first pulse repetition frequency, selectively amplifying a subset of the laser pulses. The selection of the laser pulses included in the subset is based on the first pulse repetition frequency and position data received from the beam positioning system. The method further includes adjusting the beam delivery coordinates using the one or more cooperating beam position compensation elements so as to direct the amplified laser pulses to selected targets on the workpiece.

摘要翻译： 用激光加工工件包括以第一脉冲重复频率产生激光脉冲。 第一脉冲重复频率提供用于协调光束定位系统和一个或多个配合光束位置补偿元件的参考定时，以相对于工件对准光束传送坐标。 该方法还包括在低于第一脉冲重复频率的第二脉冲重复频率下，选择性地放大激光脉冲的子集。 包括在子集中的激光脉冲的选择基于从波束定位系统接收的第一脉冲重复频率和位置数据。 该方法还包括使用一个或多个配合光束位置补偿元件来调整光束传送坐标，以便将放大的激光脉冲引导到工件上的选定目标。

公开(公告)号：US20070008534A1

公开(公告)日：2007-01-11

申请号：US11499394

申请日：2006-08-03

申请人： Ho Lo ,  David Hemenway ,  Brady Nilsen ,  Kelly Bruland

发明人： Ho Lo ,  David Hemenway ,  Brady Nilsen ,  Kelly Bruland

IPC分类号： G01B11/00

CPC分类号： H01L23/5258 ,  G11C17/14 ,  G11C17/143 ,  H01L2924/0002 ,  H01L2924/00

摘要： A system determines relative positions of a semiconductor substrate and a plurality of laser beam spots on or within the semiconductor substrate in a machine for selectively irradiating structures on or within the substrate using a plurality of laser beams. The system comprises a laser source, first and second laser beam propagation paths, first and second reflection sensors, and a processor. The laser source produces at least the first and second laser beams, which propagate toward the substrate along the first and second propagation paths, respectively, which have respective first and second axes that intersects the substrate at respective first and second spots. The reflection sensors are positioned to detect reflection of the spots, as the spots moves relative to the substrate, thereby generating reflection signals. The processor is configured to determine, based on the reflection signals, positions of the spots on or within the substrate.

摘要翻译： 系统确定半导体衬底和机器中半导体衬底上或半导体衬底内的多个激光束点的相对位置，用于使用多个激光束选择性地照射衬底上或衬底内的结构。 该系统包括激光源，第一和第二激光束传播路径，第一和第二反射传感器以及处理器。 激光源至少产生第一和第二激光束，其分别沿着第一和第二传播路径朝着衬底传播，其具有在相应的第一和第二点处与衬底相交的相应的第一和第二轴。 反射传感器被定位成检测点的反射，因为光点相对于基板移动，从而产生反射信号。 处理器被配置为基于反射信号确定基板上或内部的斑点的位置。

公开(公告)号：US20050224469A1

公开(公告)日：2005-10-13

申请号：US11000333

申请日：2004-11-29

申请人： Donald Cutler ,  Brian Baird ,  Richard Harris ,  David Hemenway ,  Ho Lo ,  Brady Nilsen ,  Yasu Osako ,  Lei Sun ,  Yunlong Sun ,  Mark Unrath

发明人： Donald Cutler ,  Brian Baird ,  Richard Harris ,  David Hemenway ,  Ho Lo ,  Brady Nilsen ,  Yasu Osako ,  Lei Sun ,  Yunlong Sun ,  Mark Unrath

IPC分类号： B23K26/06 ,  B23K26/00

CPC分类号： B23K26/06

摘要： A laser beam switching system employs a laser coupled to a beam switching device that causes a laser beam to switch between first and second beam positioning heads such that while the first beam positioning head is directing the laser beam to process a workpiece target location, the second beam positioning head is moving to another target location and vice versa. A preferred beam switching device includes first and second AOMs positioned such that the laser beam passes through the AOMs without being deflected. When RF is applied to the first AOM, the laser beam is diffracted toward the first beam positioning head, and when RF is applied to the second AOM, the laser beam is diffracted toward the second beam positioning head.

摘要翻译： 激光束切换系统采用耦合到光束切换装置的激光器，其使激光束在第一和第二光束定位头之间切换，使得当第一光束定位头引导激光束来处理工件目标位置时，第二 光束定位头正在移动到另一个目标位置，反之亦然。 优选的光束切换装置包括第一和第二AOM，其被定位成使得激光束不经偏转地穿过AOM。 当RF施加到第一AOM时，激光束朝向第一光束定位头衍射，并且当RF施加到第二AOM时，激光束被朝向第二光束定位头衍射。