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    • 3. 发明授权
    • Solids surface grid generation for three-dimensional topography
simulation
    • 固体表面网格生成用于三维地形模拟
    • US5367465A
    • 1994-11-22
    • US904005
    • 1992-06-24
    • Satoshi TazawaKazuyuki SaitoFrancisco A. Leon
    • Satoshi TazawaKazuyuki SaitoFrancisco A. Leon
    • H01L21/302G06F17/50G06T17/20H01L21/3065G06F15/72
    • G06T17/20
    • A method for creating regular triangular grid representations of a solid surface from a representation comprised of a plurality of polygons. Such a regular grid is necessary in order to accurately deform a solid during simulation of a process step. The method of the preferred embodiment is comprised generally of the steps of: removing any holes defined by the polygon face; placing a new edge between a first and second vertex of the polygon face; discarding the new edge if the new edge lies outside the polygon face or if the new edge intersects an existing edge of the polygon face; adding the new edge to the polygon face if the new edge does not lie outside the polygon face; identifying a triangle being created by the new edge and existing edges of the polygon; forming a new polygon face from the edges creating a triangle; and repeating the above steps until all polygon faces are triangulated. Once the triangulation of the polygons is completed, adjustments to the triangles is made in order to have only triangles of uniform size.
    • 一种从由多个多边形构成的表示形成固体表面的规则三角形网格表示的方法。 为了在模拟过程步骤期间准确地变形固体,需要这样的规则网格。 优选实施例的方法通常包括以下步骤:去除由多边形面限定的任何孔; 在多边形面的第一和第二顶点之间放置新的边缘; 如果新边缘位于多边形面之外或如果新边缘与多边形面的现有边缘相交,则丢弃新边缘; 如果新边缘不在多边形面之外,则将新边添加到多边形面; 识别由新边缘和多边形的现有边缘创建的三角形; 从边缘形成新的多边形面,创建三角形; 并重复上述步骤直到所有多边形面被三角测量。 一旦完成了多边形的三角测量,就可以对三角形进行调整,以便仅具有均匀尺寸的三角形。
    • 4. 发明授权
    • Boolean trajectory solid surface movement method
    • 布尔轨迹实体表面运动方法
    • US5644688A
    • 1997-07-01
    • US398410
    • 1995-03-02
    • Francisco A. LeonSatoshi TazawaGregory Anderson
    • Francisco A. LeonSatoshi TazawaGregory Anderson
    • G06F17/50G06T17/20G06T17/40
    • G06T17/20
    • A method for simulating changes to the topography of a workpiece, e.g. a semiconductor wafer, as it undergoes process steps. The method may be used to simulated isotropic or anisotropic deposition or etch process steps. A solids modeling system is used to define and deform material solids. Material solids represent the different materials on a workpiece. A plurality of trajectory solids are constructed to cause the deformation of the material solids. Deformation of a material solid is accomplished through the performance of boolean operations between the material solid and one or more trajectory solids. A characteristic of a trajectory solid, e.g. a radius or height, relates to the rate of etch or deposition for the particular process step. The method of construction of trajectory solids in the present invention enables simulation of spatially varying process steps, avoids the creation of invalid self-intersecting surfaces and minimizes the creation of small edges that lead to irregular surfaces.
    • 用于模拟工件的形貌变化的方法,例如, 半导体晶片,因为它经历了工艺步骤。 该方法可用于模拟各向同性或各向异性沉积或蚀刻工艺步骤。 固体建模系统用于定义和变形材料固体。 材料固体表示工件上的不同材料。 多个轨迹固体被构造成引起材料固体的变形。 通过在材料固体和一个或多个轨迹固体之间执行布尔运算来实现材料固体的变形。 轨迹固体的特征,例如。 半径或高度涉及特定工艺步骤的蚀刻或沉积速率。 在本发明中构造轨迹固体的方法能够模拟空间变化的工艺步骤,避免产生无效的自相交表面并且最小化导致不规则表面的小边缘的产生。
    • 5. 发明授权
    • Particle flux shadowing for three-dimensional topography simulation
    • 用于三维地形模拟的粒子通量阴影
    • US5282140A
    • 1994-01-25
    • US904001
    • 1992-06-24
    • Satoshi TazawaTetsuya AbeFrancisco A. Leon
    • Satoshi TazawaTetsuya AbeFrancisco A. Leon
    • G06F17/50G06F15/46G06F15/72
    • G06F17/5018G06F2217/16
    • In a three-dimensional (3-D) topography simulator, a method for removing sources of particle flux because of neighboring topology, for a point on a workpiece undergoing a deposition or etch process step. The method is practiced in a Generalized Solids Modeling system that utilizes a boundary representation model for representing a workpiece as one or more material object solids. For any given point on the 3-D structure, the neighboring topography forms a complex shadowing mask with respect to sources of particle flux, thus making analytical determination of visible sources of incoming particle flux difficult. The method is comprised generally of the steps of: defining a numerical mesh in a space over a surface of the workpiece; specifying an intensity of incident flux for each mesh point, identifying a set of mesh points defining a visible range of mesh points with respect to a particular target point and identifying mesh points in said set of mesh points that are obscured by neighboring topology.
    • 在三维(3-D)地形模拟器中,由于相邻的拓扑结构,用于去除经历沉积或蚀刻工艺步骤的工件上的点的方法。 该方法在通用固体建模系统中实施,其利用用于将工件表示为一个或多个材料对象固体的边界表示模型。 对于3-D结构上的任何给定点,相邻的形貌相对于粒子通量来源形成复杂的阴影掩模,从而使进入的颗粒通量的可见光源的分析测定困难。 该方法通常包括以下步骤:在工件的表面上的空间中定义数字网格; 指定每个网格点的入射通量的强度,识别一组网格点,其定义相对于特定目标点的网格点的可见范围,并识别所述网格点集合中被相邻拓扑遮蔽的网格点。
    • 6. 发明授权
    • Surface sweeping method for surface movement in three dimensional
topography simulation
    • 三维地形模拟中表面移动的表面扫描方法
    • US5586230A
    • 1996-12-17
    • US148181
    • 1993-11-05
    • Francisco A. LeonSatoshi Tazawa
    • Francisco A. LeonSatoshi Tazawa
    • G06F17/50G06T17/10G06T17/00
    • G06T17/10
    • A method for deforming a solid and avoiding the creation of self-intersecting solid structures in a topography simulator. In a topography simulated based on a solids modeling system, self-intersecting structures are solids which have boundaries that intersect. Such self-intersecting structures are invalid and cannot be processed. A general method for sweeping a solid surface to create a deformed solid and avoid the creation of self-intersecting solid structures is described, which include the steps of: providing a material solid with a surface represented as one or more segments; constructing a first segment solid for a first segment; performing a boolean set operation between the solid being swept and the first segment solid creating a temporary first solid; identifying a second segment; constructing a second segment solid for the second segment; and performing the boolean set operation between said temporary first solid and said first segment solid creating said deformed first solid. The case where simultaneous deposition and etch is occurring requires utilizes separate temporary deposition and etch solids for each segment both of which are swept to create the deformed solid.
    • 一种使固体变形并避免在地形模拟器中产生自相交固体结构的方法。 在基于实体建模系统模拟的地形中,自相交结构是具有相交边界的固体。 这种自相交结构无效,无法处理。 描述了用于扫掠固体表面以产生变形固体并避免产生自相交固体结构的一般方法,其包括以下步骤:提供具有表示为一个或多个段的表面的材料固体; 为第一段构造第一段固体; 在被扫描的实体和创建临时的第一实体的第一段固定之间执行布尔组操作; 识别第二段; 为第二段构造第二段实体; 以及在所述临时第一实体和所述第一段固体之间执行布尔组合操作,创建所述变形的第一固体。 同时沉积和蚀刻发生的情况需要对每个段进行单独的临时沉积和蚀刻固体,两个扫描都被扫过以产生变形的固体。