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    • 4. 发明授权
    • Automated system for extracting design and layout information from an
integrated circuit
    • 用于从集成电路中提取设计和布局信息的自动化系统
    • US5086477A
    • 1992-02-04
    • US564175
    • 1990-08-07
    • Kenneth K. YuC. Neil Berglund
    • Kenneth K. YuC. Neil Berglund
    • G06F17/50G06K9/00H01L27/02
    • G06K9/00G06F17/5068H01L27/0203
    • A system for extracting design information from a semiconductor integrated circuit (IC) is disclosed. The system includes a microscope and camera for capturing a composite image of the IC in the form of a video signal. Image capture occurs on a section-by-section basis in which a "snapshot" of each section is taken, the die-holding table stepped to a new section, and a snapshot of the new section obtained. This image capture operation continues until a composite image of the IC is obtained by successive capture of contiguous or partially overlapping images covering all of the different sections of the die. An image processor receives the video signal from the optical means and generates an abstract representation of the die in the form of lists of identifying features such as the size, type and relative location of all transistors, and the width, length and relative location of all of the metal interconnects to the IC. These lists are subsequently compared with reference library circuits by a computer to recognize individual circuit cells. Once all of the ciruit cells on the die have been recognized, the computer then generates a schematic netlist of the IC.
    • 公开了一种从半导体集成电路(IC)提取设计信息的系统。 该系统包括用于以视频信号的形式捕获IC的合成图像的显微镜和相机。 图像捕获发生在逐个部分的基础上,其中采取每个部分的“快照”,模具保持表步进新的部分,并获取新部分的快照。 该图像捕获操作继续进行,直到通过连续捕获覆盖芯片的所有不同部分的连续或部分重叠的图像来获得IC的合成图像。 图像处理器从光学装置接收视频信号,并以所有晶体管的尺寸,类型和相对位置以及所有晶体管的宽度,长度和相对位置等识别特征的列表的形式产生裸片的抽象表示 的金属互连到IC。 这些列表随后通过计算机与参考库电路进行比较以识别各个电路单元。 一旦芯片上的所有电路单元已被识别,计算机然后生成IC的示意网表。
    • 6. 发明授权
    • Dose modulation and pixel deflection for raster scan lithography
    • 用于光栅扫描光刻的剂量调制和像素偏转
    • US5393987A
    • 1995-02-28
    • US69222
    • 1993-05-28
    • Frank E. AbboudAndrew J. MurayC. Neil Berglund
    • Frank E. AbboudAndrew J. MurayC. Neil Berglund
    • H01J37/305H01J37/302H01J37/317H01L21/027
    • B82Y10/00B82Y40/00H01J37/302H01J37/3174H01J2237/30488
    • A raster scan lithography system is modified so that the duration of illumination (dose modulation) for particular pixels is varied to lie between the full on and full off normally used. For instance, three levels of pixel intensity are provided, 100%, 70% and 30% (in addition to off which is 0%). The 30% and 70% pixels are used along the edge of a feature so as to locate the edge when written in between the lines of the cartesian raster scan grid. Thus the edges of the feature are moved off the grid, without the need for multiple passes. This pixel dose modulation uses three preset delay lines determining dwell times for each pixel on a pixel-by-pixel basis, as defined by a two (or more) bit deep memory file associated with the pattern to be written. Additionally, the pixel center locations are directly moved off the grid by deflecting the beam as it scans certain pixels located along feature edges. The amount of deflection is controllably variable to achieve various edge locations. This deflection is used by itself or in combination with dose modulation, and is implemented by an electrostatic deflector in the beam lens for an E-beam system.
    • 修改光栅扫描光刻系统,使特定像素的照明持续时间(剂量调制)变化,以处于正常使用的全开和关闭之间。 例如,提供三个等级的像素强度,100%,70%和30%(除了0%之外)。 沿着特征的边缘使用30%和70%的像素,以便在写入笛卡尔光栅扫描网格的线之间时定位边缘。 因此,特征的边缘从网格移开,而不需要多遍。 该像素剂量调制使用三个预设延迟线来确定每个像素在逐个像素的基础上的停留时间,如由要写入的图案相关联的两个(或多个)位深存储器文件所定义的。 此外,像素中心位置通过在扫描沿着特征边缘定位的某些像素时偏转光束而直接从网格移开。 偏转量可控地变化以实现各种边缘位置。 该偏转本身或与剂量调制结合使用,并且由电子束系统的束透镜中的静电偏转器实现。