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    • 1. 发明授权
    • Methods of incorporating process-induced layout dimension changes into an integrated circuit simulation netlist
    • 将过程引起的布局维度变化纳入集成电路仿真网表的方法
    • US07765498B1
    • 2010-07-27
    • US11805739
    • 2007-05-24
    • Jonathan J. HoYan WangXin X. WuJane W. Sowards
    • Jonathan J. HoYan WangXin X. WuJane W. Sowards
    • G06F17/50
    • G06F17/5072G06F17/5081
    • Computer-implemented methods of generating netlists for use in post-layout simulation procedures. A lookup table includes a predetermined set of features (e.g., transistors of specified sizes and shapes) supported by an integrated circuit (IC) fabrication process, with dimensions and process induced dimension variations being included for each feature. A netlist is extracted from an IC layout, the extracted netlist specifying circuit elements (e.g., transistors) implemented by the IC layout and interconnections between the circuit elements. A search pattern is run on the IC layout to identify features in the IC layout corresponding to features included in the lookup table. Circuit elements in the extracted netlist that correspond to the identified features are then modified using values from the lookup table, and the modified netlist is output. In some embodiments, the netlist extraction, search pattern, and netlist modification are all performed as a single netlist generation step.
    • 计算机实现的生成用于后布局模拟程序的网表的方法。 查找表包括由集成电路(IC)制造过程支持的预定的一组特征(例如,特定尺寸和形状的晶体管),其中每个特征包括尺寸和工艺引起的尺寸变化。 从IC布局提取网表,提取的网表指定电路元件(例如,晶体管)由IC布局实现,并且电路元件之间的互连。 在IC布局上运行搜索模式,以识别与查找表中包含的功能相对应的IC布局中的功能。 然后使用来自查找表的值来修改对应于所识别的特征的提取的网表中的电路元件,并输出修改的网表。 在一些实施例中,网表提取,搜索模式和网表修改都被执行为单个网表生成步骤。
    • 2. 发明授权
    • Method of generating an IC mask using a reduced database
    • 使用简化数据库生成IC掩模的方法
    • US06868537B1
    • 2005-03-15
    • US10082991
    • 2002-02-25
    • Jonathan J. HoXin X. WuZicheng Gary LingJan L. de Jong
    • Jonathan J. HoXin X. WuZicheng Gary LingJan L. de Jong
    • G03F1/14G06F17/50
    • G03F1/36G03F1/68G06F17/5068G06F2217/12
    • For IC devices that have repeating structures, a method of generating a database for making a mask layer starts with a hierarchical database describing at least one repeating element in the layer, a skeleton that surrounds the repeating elements, and instructions as to where to locate the repeating elements within the skeleton. This database is modified to generate a database that has optical proximity correction (OPC) for diffraction of light that will pass through the mask and expose photoresist on the IC layer. The optical-proximity corrected mask database is fractured by a mask house using instructions on how the modified data base will be divided to form repeating elements that are still identical after OPC, a mask skeleton that includes non-repeating elements, and instructions for placement of the repeating elements in the skeleton. Thus the resulting mask database is smaller than a mask database that includes all copies of repeating elements.
    • 对于具有重复结构的IC设备,生成用于制作掩模层的数据库的方法从描述层中的至少一个重复元素的分层数据库开始,围绕重复元素的骨架以及关于在哪里定位的指令 重复骨骼内的元素。 该数据库被修改以产生具有光学邻近校正(OPC)的数据库,用于衍射通过掩模并在IC层上曝光光致抗蚀剂的光的衍射。 使用关于如何将经修改的数据库分割以形成在OPC之后仍然相同的重复元素的指令,包含非重复元素的掩码框架以及用于放置 骨骼中的重复元素。 因此,所得到的掩码数据库小于包含所有重复元素副本的掩码数据库。
    • 7. 发明授权
    • Methods and structures for protecting reticles from ESD failure
    • 保护掩模版免受ESD故障的方法和结构
    • US06376131B1
    • 2002-04-23
    • US09542127
    • 2000-04-04
    • Jae ChoZhi-Min LingXin X. Wu
    • Jae ChoZhi-Min LingXin X. Wu
    • G03F900
    • G03F1/40
    • A reticle that is modified to prevent bridging of the masking material (e.g., chrome) between portions of the lithographic mask pattern during an integrated circuit fabrication process. According to a first aspect, the modification involves electrically connecting the various portions of the lithographic mask pattern that balance charges generated in the portions during fabrication processes. In one embodiment, sub-resolution wires that extend between the lithographic mask pattern portions facilitate electrical conduction between the mask pattern portions, thereby equalizing dissimilar charges. In another embodiment, a transparent conductive film is formed over the lithographic mask pattern to facilitate conduction. In accordance with a second aspect, the modification involves separating the various portions of the lithographic mask pattern into relatively small segments by providing sub-resolution gaps between the various portions, thereby minimizing the amount of charge that is generated on each portion.
    • 在集成电路制造工艺期间,被修饰以防止掩模材料(例如,铬)桥接在光刻掩模图案的部分之间的掩模版。 根据第一方面,修改涉及电连接平版印刷掩模图案的各个部分,以平衡在制造工艺期间部分中产生的电荷。 在一个实施例中,在光刻掩模图案部分之间延伸的子分辨率线促进掩模图案部分之间的导电,从而均衡不同的电荷。 在另一个实施例中,在光刻掩模图案之上形成透明导电膜以促进传导。 根据第二方面,修改包括通过在各部分之间提供次分辨率间隙将光刻掩模图案的各个部分分离成相对较小的部分,从而最小化在每个部分上产生的电荷量。
    • 10. 发明授权
    • Method of forming a zener diode
    • 形成齐纳二极管的方法
    • US06645802B1
    • 2003-11-11
    • US09877690
    • 2001-06-08
    • Sheau-Suey LiShahin ToutounchiMichael J. HartXin X. WuDaniel Gitlin
    • Sheau-Suey LiShahin ToutounchiMichael J. HartXin X. WuDaniel Gitlin
    • H01L218234
    • H01L27/0251Y10S438/983
    • An ESD protection circuit includes a bipolar transistor, a resistor, and a zener diode formed on and within a semiconductor substrate. The resistor extends between the base and emitter regions of the transistor so that voltage developed across the resistor can turn on the transistor. The zener diode is formed in series with the resistor and extends between the base and collector regions of the transistor. Thus configured, breakdown current through the zener diode, typically in response to an ESD event, turns on the transistor to provide a nondestructive discharge path for the ESD. The zener diode includes anode and cathode diffusions. The cathode diffusion extends down into the semiconductor substrate in a direction perpendicular to the substrate. The anode diffusion extends down through the cathode diffusion into the semiconductor substrate. The anode diffusion extends down further than the cathode diffusion so that the zener diode is arranged vertically with respect to the substrate. The cathode diffusion can be formed using two separate diffusions, one of which extends deeper into the substrate than other.
    • ESD保护电路包括形成在半导体衬底上和半导体衬底内的双极晶体管,电阻器和齐纳二极管。 电阻器在晶体管的基极和发射极区域之间延伸,使跨越电阻器的电压可以导通晶体管。 齐纳二极管与电阻器串联形成,并在晶体管的基极和集电极区域之间延伸。 如此配置,通常通过齐纳二极管的击穿电流(通常响应于ESD事件)导通晶体管,以为ESD提供非破坏性的放电路径。 齐纳二极管包括阳极和阴极扩散。 阴极扩散沿垂直于衬底的方向向下延伸到半导体衬底中。 阳极扩散通过阴极扩散向下延伸到半导体衬底中。 阳极扩散比阴极扩散向下延伸,使得齐纳二极管相对于衬底垂直布置。 可以使用两个分开的扩散形成阴极扩散,其中一个扩散比其它扩散更深。