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    • 3. 发明授权
    • Method, apparatus and program product for automatic placement and routing of integrated circuit
    • 用于集成电路自动放置和布线的方法,设备和程序产品
    • US06968521B2
    • 2005-11-22
    • US10331513
    • 2002-12-31
    • Kenichi UshiyamaShigenori IchinoseKouji Banno
    • Kenichi UshiyamaShigenori IchinoseKouji Banno
    • G06F17/50H01L21/82
    • G06F17/5072
    • After automatic cell placement, the following steps are performed before performing automatic inter-cell routing. (S22) Estimated wires having Manhattan-length path are connected between same-node terminals of cells, and detected and counted is a crosstalk error that parallel-wire length is more than a predetermined value. (S23) The detected error is resolved by moving cells closely spaced less than a predetermined interval apart and connected to the error-detected estimated wires; the cell movement data is stored in a storage device; and such processes are repeated N times; and the cell placement data is modified on the basis of the cell movement data corresponding to the minimum value of error-count values of all the N times. (S24) If the minimum value is not 0, (S25) a buffer cell is inserted in the error-detected estimated wire. (S27) Obtained is the wire density of estimated wiring having Manhattan-length path, and if the density is more than a predetermined value, the design-target frame is enlarged in size, and the process returns to the automatic cell placement process.
    • 在自动单元格放置之后,在执行自动单元间路由之前执行以下步骤。 (S22)具有曼哈顿长度路径的估计线路连接在小区的相同节点终端之间,并且被检测和计数是并行线长度大于预定值的串扰误差。 (S23)检测到的误差通过移动细胞间隔小于预定间隔的距离并连接到检错估计的线来解决; 单元移动数据存储在存储装置中; 并且这样的处理重复N次; 并且基于与所有N次的误差计数值的最小值相对应的单元移动数据来修改单元布置数据。 (S24)如果最小值不为0,则将(S25)缓冲单元插入到检测出的误差线中。 (S27)获得具有曼哈顿路径的估计布线的线密度,并且如果密度大于预定值,则设计目标帧的尺寸被放大,并且处理返回到自动单元放置处理。