calibre antenna 的问题（有请各路高手在此贴一聚）

cwg540 · 发表于 2009-3-30 14:07:46

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我在encounter 里routing之后verify antenna没有查出violation。
但是到calibre check antenna时报了近300个错误，错误信息如下：
Rule File Pathname: /home/cwg/cds/_SmicAT4TSP8R_cal018_mixlog_p1mt6.ant_
Max. (M3 perim*thickness / gate area) is 400 (without effective diode)
Max. (M3 perim*thickness / gate area) is Ratio Equation (with effective diode)

Rule File Pathname: /home/cwg/cds/_SmicAT4TSP8R_cal018_mixlog_p1mt6.ant_
Max. (M4 perim*thickness / gate area) is 400 (without effective diode)
Max. (M4 perim*thickness / gate area) is Ratio Equation (with effective diode)

Rule File Pathname: /home/cwg/cds/_SmicAT4TSP8R_cal018_mixlog_p1mt6.ant_
Max. (M5 perim*thickness / gate area) is 400 (without effective diode)
Max. (M5 perim*thickness / gate area) is Ratio Equation (with effective diode)

Rule File Pathname: /home/cwg/cds/_SmicAT4TSP8R_cal018_mixlog_p1mt6.ant_
(V5 area / gate area) > 20 (without effective diode)
(V5 area / gate area) > Ratio Equation (with effective diode)

我比较了一下encounter里用的antenna的lef文件和calibre里的ant文件对于M3.M4.M5和V5的定义如下：
antenna的lef文件：
LAYER METAL3
Thickness 0.53 ;
AntennaSideAreaRatio 396 ;
AntennaDiffSideAreaRatio PWL ( ( 0 396 ) ( 0.201 396 ) ( 0.202 1980 ) ( 0.404 3960 ) ) ;
END METAL3

LAYER METAL4
Thickness 0.53 ;
AntennaSideAreaRatio 396 ;
AntennaDiffSideAreaRatio PWL ( ( 0 396 ) ( 0.201 396 ) ( 0.202 1980 ) ( 0.404 3960 ) ) ;
END METAL4

LAYER METAL5
Thickness 0.53 ;
AntennaSideAreaRatio 396 ;
AntennaDiffSideAreaRatio PWL ( ( 0 396 ) ( 0.201 396 ) ( 0.202 1980 ) ( 0.404 3960 ) ) ;
END METAL5

LAYER VIA56
AntennaAreaRatio 20 ;
AntennaDiffAreaRatio PWL ( ( 0 20 ) ( 0.201 20 ) ( 0.202 74.00 ) ( 0.404 148.00 ) ) ;
END VIA56

calibre里的ant文件：
// M3 Layer
//=================
CONNECT M3 M2 BY V2
CONNECT V3 M3
M3_DIO = NET AREA SD  >=0.203 // minimum effective diode 0.203um2
ANT.GT.2_3.M3 {
@ Max. (M3 perim*thickness / gate area) is 400 (without effective diode)
@ Max. (M3 perim*thickness / gate area) is Ratio Equation (with effective diode)
  NET AREA RATIO GT M1 M2 M3 V3 M3_DIO GATE > 400
   [ PERIMETER(M3)*0.53/AREA(GATE) - (AREA(M3_DIO)*400 + !!AREA(M3_DIO)*1800) ]
  RDB ANT_GT23_M3.rep GT M1 M2 M3 M3_DIO GATE
}

// M4 Layer
//=================
CONNECT M4 M3 BY V3
CONNECT V4 M4
M4_DIO = NET AREA SD  >=0.203 // minimum effective diode 0.203um2
ANT.GT.2_3.M4 {
@ Max. (M4 perim*thickness / gate area) is 400 (without effective diode)
@ Max. (M4 perim*thickness / gate area) is Ratio Equation (with effective diode)
  NET AREA RATIO GT M1 M2 M3 M4 V4 M4_DIO GATE > 400
   [ PERIMETER(M4)*0.53/AREA(GATE) - (AREA(M4_DIO)*400 + !!AREA(M4_DIO)*1800) ]
  RDB ANT_GT23_M4.rep GT M1 M2 M3 M4 M4_DIO GATE
}

// M5 Layer
//=================
CONNECT M5 M4 BY V4
CONNECT V5 M5
M5_DIO = NET AREA SD  >=0.203 // minimum effective diode 0.203um2
ANT.GT.2_3.M5 {
@ Max. (M5 perim*thickness / gate area) is 400 (without effective diode)
@ Max. (M5 perim*thickness / gate area) is Ratio Equation (with effective diode)
  NET AREA RATIO GT M1 M2 M3 M4 M5 V5 M5_DIO GATE > 400
   [ PERIMETER(M5)*0.53/AREA(GATE) - (AREA(M5_DIO)*400 + !!AREA(M5_DIO)*1800) ]
  RDB ANT_GT23_M5.rep GT M1 M2 M3 M4 M5 M5_DIO GATE
}

// V5 Layer
//=================
ANT.GT.5_6.V5 {
@ (V5 area / gate area) > 20 (without effective diode)
@ (V5 area / gate area) > Ratio Equation (with effective diode)
  NET AREA RATIO GT M1 M2 M3 M4 M5 V5 M5_DIO GATE > 20
   [ AREA(V5)/AREA(GATE) - (AREA(M5_DIO)*83.33 + !!AREA(M5_DIO)*55) ]
  RDB ANT_GT56_V5.rep GT M1 M2 M3 M4 M5 V5 M5_DIO GATE
}

现在我的问题就是根据calibre里的ant文件来改antenna的lef文件，具体应该怎么改呢？