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    • 1. 发明授权
    • Alignment mark contrast enhancement
    • 对齐标记对比度增强
    • US5863825A
    • 1999-01-26
    • US940156
    • 1997-09-29
    • Nicholas F. PaschMarilyn HwanRichard OsugiColin YatesDawn LeeShumay Dou
    • Nicholas F. PaschMarilyn HwanRichard OsugiColin YatesDawn LeeShumay Dou
    • H01L21/027H01L23/544H01L21/76
    • H01L23/544H01L2223/54453H01L2924/0002
    • A method of providing etched alignment marks on a semiconductor workpiece that has a substantially planar surface, such as one that has been polished, for supporting accurate alignment of the workpiece in subsequent process operations. The surface of the semiconductor workpiece includes two layers of materials that abut at the workpiece surface. For example, the workpiece may include a layer of insulative material such as silicon dioxide forming several vias and a layer of conductive material such as tungsten forming plugs in the vias. The method includes etching the substantially planar surface to reduce a height of one of the materials below the height of the other material. For example, the tungstein plugs can be etched to a height that is below the height of the surrounding silicon dioxide. The location where the silicon dioxide abuts the tungsten produces a small bump. This bump then serves as an alignment mark for subsequent operations. Furthermore, such subsequent operations will replicate, and/or enhance, the topographical distinction of the alignment mark.
    • 在半导体工件上提供蚀刻的对准标记的方法,其具有基本上平坦的表面,例如已被抛光的表面,用于在随后的工艺操作中支持工件的精确对准。 半导体工件的表面包括在工件表面上邻接的两层材料。 例如,工件可以包括一层绝缘材料,例如形成几个通孔的二氧化硅和一个导电材料层,例如通孔中形成钨的插塞。 该方法包括蚀刻基本上平坦的表面,以将材料之一的高度降低到低于另一材料高度的高度。 例如,钨锡塞可被蚀刻到低于周围二氧化硅高度的高度。 二氧化硅与钨接触的位置产生小的凸起。 然后,该凸块用作后续操作的对准标记。 此外,这样的后续操作将复制和/或增强对准标记的形貌区分。
    • 4. 再颁专利
    • Automating photolithography in the fabrication of integrated circuits
    • 在制造集成电路时自动化光刻
    • USRE38900E1
    • 2005-11-29
    • US09273171
    • 1999-03-19
    • Michael D. RostokerNicholas F. PaschAshok K. Kapoor
    • Michael D. RostokerNicholas F. PaschAshok K. Kapoor
    • G03F7/20H01L21/66
    • G03F7/705G03F7/20G03F7/70433
    • Automated photolithography of integrated circuit wafers is enabled with a processor connected to a Rayleigh derator, a form factor generator, a logic synthesizer, a layout generator, a lithography module and a wafer process. The Rayleigh derator receives manufacturing information resulting from yield data in the wafer process, and this manufacturing data is then used to derate the theoretical minimum feature size available for etching wafer masks given a known light source and object lens numerical aperture. This minimum feature size is then used by a form factor generator in sizing transistors in a net list to their smallest manufacturable size. A logic synthesizer then converts the net list into a physical design using a layout generator combined with user defined constraints. This physical design is then used by the mask lithography module to generate wafer masks for use in the semiconductor manufacturing. Manufacturing data including process and yield parameters is then transferred back to the Rayleigh processor for use in the designing of subsequent circuits. In this way, a direct coupling exists between the measurement of wafer process parameters and the automated sizing of semiconductor devices, enabling the production of circuits having the smallest manufacturable device sizes available for the given lithography and wafer process.
    • 集成电路晶片的自动光刻可通过连接到瑞利分离器,形状因子发生器,逻辑合成器,布局发生器,光刻模块和晶片工艺的处理器来实现。 Rayleigh变矩器接收由晶片工艺中的屈服数据产生的制造信息,然后使用该制造数据降低可用于蚀刻具有已知光源和物镜数值孔径的晶片掩模的理论最小特征尺寸。 然后,这种最小特征尺寸由形状因子发生器用于将网络列表中的晶体管调整到其最小可制造尺寸。 然后,逻辑合成器将网络列表转换为使用布局生成器与用户定义的约束组合的物理设计。 然后该掩模光刻模块将该物理设计用于半导体制造中使用的晶片掩模。 然后将包括处理和产量参数的制造数据传送回瑞利处理器,以用于后续电路的设计。 以这种方式,在晶片工艺参数的测量和半导体器件的自动化尺寸之间存在直接耦合,使得能够生产具有可用于给定光刻和晶片工艺的最小可制造器件尺寸的电路。
    • 9. 发明授权
    • Apparatus and method using optical energy for specifying and
quantitatively controlling chemically-reactive components of
semiconductor processing plasma etching gas
    • 用于指定和定量控制半导体处理等离子体蚀刻气体的化学反应性组分的光能的装置和方法
    • US5696428A
    • 1997-12-09
    • US485517
    • 1995-06-07
    • Nicholas F. Pasch
    • Nicholas F. Pasch
    • C23C16/517H01J37/32H01J7/24
    • H01J37/321C23C16/517H01J37/32009H01J37/3233H01J37/32339
    • An apparatus for producing a plasma suitable for semiconductor processing at pressures in the low millitorr range. The apparatus includes a vacuum chamber with a dielectric window, a generally planar coil disposed adjacent the window outside the chamber and coupled to an appropriate power source, and a plasma initiator disposed within the chamber. Once the plasma is initiated, the planar coil sustains the plasma by inductive power coupling. In one embodiment the plasma initiator is a secondary electrode disposed within the chamber and coupled to a second RF power source. In an alternative embodiment both the secondary electrode and a target pedestal are coupled to the secondary RF power source through a power splitter. In an alternative embodiment, the plasma initiator is used to ionize a portion of the process gas and provide a plasma that may then inductively couple with the planar coil. Initial ionization of the process gas may be achieved by use of an ultraviolet light source, an ultraviolet laser, a high voltage power source such as a tesla coil, or an electrical arc forming device such as a spark plug. A further aspect of the invention concerns introducing optical energy of preselected frequencies or wavelengths into a semiconductor processing plasma to induce changes in the composition or character of reactive species within the plasma.
    • 一种用于在低压力范围内的压力下生产适合半导体加工的等离子体的装置。 该设备包括具有电介质窗口的真空室,与室外的窗口相邻设置并且耦合到适当的电源的大致平面的线圈以及设置在室内的等离子体启动器。 一旦等离子体启动,平面线圈通过感应功率耦合来维持等离子体。 在一个实施例中,等离子体引发器是设置在室内并且耦合到第二RF电源的次级电极。 在替代实施例中,辅助电极和目标基座都通过功率分配器耦合到次级RF电源。 在替代实施例中,等离子体引发器用于电离一部分工艺气体并提供等离子体,其然后可以与平面线圈感应耦合。 处理气体的初始电离可以通过使用紫外光源,紫外激光器,诸如特斯拉线圈的高压电源或诸如火花塞的电弧形成装置来实现。 本发明的另一方面涉及将预选频率或波长的光能引入半导体处理等离子体以引起等离子体内的反应物质的组成或特性的变化。
    • 10. 发明授权
    • Process for performing low wavelength photolithography on semiconductor
wafer using afocal concentration
    • 使用无焦点浓度在半导体晶片上进行低波长光刻的工艺
    • US5666189A
    • 1997-09-09
    • US519797
    • 1995-08-28
    • Michael D. RostokerNicholas F. PaschJoe Zelayeta
    • Michael D. RostokerNicholas F. PaschJoe Zelayeta
    • G03F7/20G03B27/42
    • G03F7/70008G03F7/702G03F7/70375Y10S430/167
    • Fine, sub-micron line features and patterns are created in a sensitized layer on a semiconductor wafer by a beam of low wavelength radiation, such as X-rays or Gamma-rays. A stream of such radiation is concentrated and collimated by a concentrator, the output of which is disposed in close proximity to the sensitized surface of the wafer. In this manner, the sensitized surface can be converted from one chemical state to another chemical state, essentially point-by-point. By moving one or the other of the beam or the wafer, line features can be converted in the sensitized surface. Typically, non-converted areas of the sensitized surface are removed, for further processing a layer underlying the sensitized surface. The concentrator is useful in for directing a stream of radiation from a continuously emitting source, such as from a pellet of Cobalt-60, onto the sensitized surface of the wafer when a shutter mechanism is incorporated either upstream (towards the source) or downstream (towards the wafer) from the concentrator.
    • 通过诸如X射线或γ射线的低波长辐射束在半导体晶片上的增感层中产生细微亚微米线特征和图案。 这种辐射流被集中器集中并准直,该集中器的输出设置在晶片敏感表面附近。 以这种方式,致敏表面可以从一个化学状态转变为另一个化学状态,基本上是逐点的。 通过移动光束或晶片中的一个或另一个,可以在致敏表面中转换线特征。 通常,去除敏化表面的未转化区域,以进一步处理敏化表面下面的层。 浓缩器可用于在将快门机构并入上游(朝向源)或下游(在源头)处引入来自连续发射源的辐射流,例如由钴-60颗粒沉积到晶片的致敏表面上( 朝向晶片)。