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    • 31. 发明授权
    • Automatic generation of phase shift masks using net coloring
    • 使用净色自动生成相移掩模
    • US6066180A
    • 2000-05-23
    • US268414
    • 1999-03-15
    • Young O. KimMark A. LavinLars W. LiebmannGlenwood S. Weinert
    • Young O. KimMark A. LavinLars W. LiebmannGlenwood S. Weinert
    • G03F1/08G06F17/50H01L21/027G06K9/00
    • G06F17/5068
    • According to the preferred embodiment, a method is provided for automatically coloring VLSI design elements for the purpose of assigning binary properties to the elements. The preferred method is particularly applicable for use generating phase shift mask designs from VLSI CAD datasets. The preferred method uses net coloring to automatically generate a data set of colored elements. The preferred method is not dependent on the order in which the elements are operated upon. The preferred method has the additional advantage of being able to automatically detect conflicts that prevent the VLSI design from being optimally colored. The preferred method is equally applicable to hierarchical VLSI databases with nested components and traditional flat databases. When applied the hierarchical databases, the preferred method provides element coloring with minimal data flattening required.
    • 根据优选实施例,提供了一种用于自动着色VLSI设计元件以便为元件分配二进制特性的方法。 优选的方法特别适用于从VLSI CAD数据集产生相移掩模设计。 首选方法使用净色来自动生成彩色元素的数据集。 优选的方法不依赖于操作元件的顺序。 优选的方法具有能够自动检测阻止VLSI设计被最佳着色的冲突的额外优点。 优选的方法同样适用于具有嵌套组件和传统平面数据库的分层VLSI数据库。 当应用分层数据库时,首选方法提供了元素着色,需要最少的数据平坦化。
    • 33. 发明授权
    • Variable density fill shape generation
    • 可变密度填充形状生成
    • US5923563A
    • 1999-07-13
    • US770925
    • 1996-12-20
    • Mark A. LavinWilliam C. Leipold
    • Mark A. LavinWilliam C. Leipold
    • G06F17/50
    • G06F17/5081G06F2217/12Y02P90/265
    • The present invention is directed to a method for adding fill shapes to a chip in a manner which accommodates a wide range of within-chip pattern density variations and provides a tight pattern density control (i) within a chip and (ii) from chip to chip. The present invention imposes a grid over a chip design pattern, wherein each section of the grid contains a portion of the chip design. A pattern density is then determined for each section of the grid, based on that portion of the chip design pattern which lies within the particular grid section. The results of the pattern density determination are used to determine where to place fill shapes in the chip design in order to increase a density value in each section of the grid to that of a target density value. The method and apparatus of the present invention provide a best fit approximation to the desired pattern density consistent with a set of layout rules for the level being patterned.
    • 本发明涉及一种用于以适合宽范围的片内图案密度变化的方式向芯片添加填充形状的方法,并且提供在芯片内的紧密图案密度控制(i)和(ii)从芯片到 芯片。 本发明在芯片设计图案上施加格栅,其中网格的每个部分包含芯片设计的一部分。 然后,基于位于特定网格部分内的芯片设计图案部分,确定网格的每个部分的图案密度。 使用图案密度确定的结果来确定在芯片设计中将填充形状放置在哪里,以便将网格的每个部分中的密度值增加到目标密度值的密度值。 本发明的方法和装置提供与期望图案密度的最佳拟合近似,其与图案化级别的一组布局规则一致。
    • 35. 发明授权
    • Rendering a mask using coarse mask representation
    • 使用粗糙掩码表示渲染掩模
    • US08073288B2
    • 2011-12-06
    • US12015084
    • 2008-01-16
    • Mark A. LavinMaharaj MukherjeeAlan E. Rosenbluth
    • Mark A. LavinMaharaj MukherjeeAlan E. Rosenbluth
    • G06K9/20
    • G03F7/705G03F1/36
    • A method, system and computer program product for rendering a mask are disclosed. A method of rendering a mask may comprise: providing an initial mask design for a photolithographic process, the initial mask design including polygons; initially rendering the initial mask design as a coarse mask representation in a pixel based image calculation; identifying an overhang portion; and rendering the overhang portion using a set of subpixels whose artifacts from spatial-localization lie outside a practical resolution of a pseudo lens having a numerical aperture larger than that of a projection lens used in the photolithographic process; and updating the initial rendering based on the overhang portion rendering.
    • 公开了一种用于渲染掩模的方法,系统和计算机程序产品。 渲染掩模的方法可以包括:提供用于光刻工艺的初始掩模设计,初始掩模设计包括多边形; 最初在基于像素的图像计算中将初始掩模设计呈现为粗糙掩模表示; 识别突出部分; 并且使用一组子空间渲染悬伸部分,其中来自空间定位的伪像位于具有大于在光刻工艺中使用的投影透镜的数值孔径的假透镜的实际分辨率之外; 并基于突出部分呈现来更新初始呈现。
    • 40. 发明授权
    • System for search and analysis of systematic defects in integrated circuits
    • 集成电路系统缺陷的搜索和分析系统
    • US07415695B2
    • 2008-08-19
    • US11748575
    • 2007-05-15
    • Bette L. Bergman ReuterDavid L. DeMarisMark A. LavinWilliam C. LeipoldDaniel N. MaynardMaharaj Mukherjee
    • Bette L. Bergman ReuterDavid L. DeMarisMark A. LavinWilliam C. LeipoldDaniel N. MaynardMaharaj Mukherjee
    • G06F17/50
    • G06T7/001G06T2207/30148
    • Disclosed is a method of locating systematic defects in integrated circuits. The invention first performs a preliminary extracting and index processing of the circuit design and then performs feature searching. When performing the preliminary extracting and index processing the invention establishes a window grid for the circuit design and merges basis patterns with shapes in the circuit design within each window of the window grid. The invention transforms shapes in a each window into feature vectors by finding intersections between the basis patterns and the shapes in the windows. Then, the invention clusters the feature vectors to produce an index of feature vectors. After performing the extracting and index processing, the invention performs the process of feature searching by first identifying a defect region window of the circuit layout and similarly merging basis patterns with shapes in the defect region window. This merging process can include rotating and mirroring the shapes in the defect region. The invention similarly transforms shapes in the defect region window into defect vectors by finding intersections between basis patterns and the shapes in the defect region. Then, the invention can easily find feature vectors that are similar to the defect vector using, for example, representative feature vectors from the index of feature vectors. Then, the similarities and differences between the defect vectors and the feature vectors can be analyzed.
    • 公开了一种定位集成电路系统缺陷的方法。 本发明首先进行电路设计的初步提取和索引处理,然后执行特征搜索。 当执行初步提取和索引处理时,本发明建立了用于电路设计的窗口网格,并且将窗体网格的每个窗口内的电路设计中的形状与基本图案合并。 本发明通过在窗口中找到基本图案和形状之间的交点来将每个窗口中的形状转换为特征向量。 然后,本发明聚集特征向量以产生特征向量的索引。 在执行提取和索引处理之后,本发明通过首先识别电路布局的缺陷区域窗口并且将基本模式与缺陷区域窗口中的形状类似地合并来执行特征搜索的处理。 该合并过程可以包括旋转和镜像缺陷区域中的形状。 本发明类似地通过在缺陷区域中找到基础图案和形状之间的交点来将缺陷区域窗口中的形状转换为缺陷向量。 然后,本发明可以使用例如来自特征向量的索引的代表性特征向量容易地找到与缺陷向量相似的特征向量。 然后,可以分析缺陷向量和特征向量之间的相似性和差异。