标准单元库 LVS验证出现property error

清风慕竹 · 发表于 2015-8-26 09:51:39

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大家好，我最近在做版图设计时（chart 0.18 um工艺）用了arm的标准单元库里的一些cell，但其中的NOR和NAND在做LVS时总会有property error，而AND、INV、BUF和DFFR都正常（只用到了这些）。单独做NOR的LVS也有property error，report 如下：
捕获1.PNG

NOR2X2版图

               CELL COMPARISON RESULTS ( TOP LEVEL )

               # #       #####################
               # #       #                #
                  #          #    INCORRECT    #
               # #       #                #
               # #       #####################

  Error: Property errors.

LAYOUT CELL NAME:       NOR2X2
SOURCE CELL NAME:       NOR2X2

--------------------------------------------------------------------------------------------------------------

INITIAL NUMBERS OF OBJECTS
--------------------------

            Layout Source       Component Type
            ------ ------       --------------
Ports:             5       5

Nets:             7       7

Instances:       2       2       MN (4 pins)
                  4       4       MP (4 pins)
                  1       0 * D (2 pins)
            ------ ------
Total Inst:       7       6

NUMBERS OF OBJECTS AFTER TRANSFORMATION
---------------------------------------

            Layout Source       Component Type
            ------ ------       --------------
Ports:             5       5

Nets:             5       5

Instances:       1       1       _nor2v (5 pins)
            ------ ------
Total Inst:       1       1

   * = Number of objects in layout different from number in source.

**************************************************************************************************
                                    PROPERTY ERRORS

DISC#  LAYOUT                                                 SOURCE                   ERROR
**************************************************************************************************

  1 M4(1.920,2.800)  MP(PMOS_1P8)                            Mm5  MP(PMOS_1P8)
   m: -3.40282e+38                                        m: -3.40282e+38

  2 M5(2.480,2.800)  MP(PMOS_1P8)                            Mm3  MP(PMOS_1P8)
   m: -3.40282e+38                                        m: -3.40282e+38

**************************************************************************************************
                           INFORMATION AND WARNINGS
**************************************************************************************************

               Matched Matched Unmatched Unmatched Component
               Layout    Source    Layout    Source Type
               ------- ------- --------- --------- ---------
Ports:             5       5          0          0

Nets:             5       5          0          0

Instances:          1       1          0          0 _nor2v
               ------- ------- --------- ---------
Total Inst:       1       1          0          0

o Statistics:

1 layout instance was filtered and its pins removed from adjoining nets.

4 layout mos transistors were reduced to 2.  1 connecting net was deleted.
   2 mos transistors and 1 connecting net were deleted by split-gate reduction.
4 source mos transistors were reduced to 2.  1 connecting net was deleted.
   2 mos transistors and 1 connecting net were deleted by split-gate reduction.

o Initial Correspondence Points:

Ports:       VDD VSS Y A B

其中的红色加粗部分就是出现的错误信息，不知道这是什么错误，m: -3.40282e+38又是什么参数，还望大神指点，多谢！

icfbicfb · 发表于 2015-8-26 11:04:09

看你的trace property 容差是多少， 1~5% 都是可以忍受的，

或者问下vendor也行

清风慕竹 · 发表于 2015-8-26 15:21:49

回复 2# icfbicfb

你好，我试着将tolerance改成了5%，但还是有那个错误。请问通常报property error，除了原理图和版图中管子尺寸不匹配，还有可能是什么原因啊？
因为看这错误应该不是尺寸不匹配。
多谢

DISC#  LAYOUT                                                                SOURCE                               ERROR
****************************************************************************************
  1 M4(1.920,2.800)  MP(PMOS_1P8)                            Mm5  MP(PMOS_1P8)
      m: -3.40282e+38                                                    m: -3.40282e+38

  2 M5(2.480,2.800)  MP(PMOS_1P8)                            Mm3  MP(PMOS_1P8)
      m: -3.40282e+38                                                    m: -3.40282e+38