drcExtractRules(

   bkgnd = geomBkgnd()
   TO = geomOr( "TO" )
   TB = geomOr( "TB" )
   GT = geomOr( "GT" )

   SP1=geomInside(TO TB )
   SP_1=geomStraddle( SP1 GT )
   SP_2=geomAnd(TB  SP_1)

   SN1=geomOutside(TO TB)
   SN_1=geomStraddle(SN1 GT)

   SN_31=geomAndNot(SP1 SP_2)
   SN_3 =geomAndNot(SN_31 SN_1)

   SP_31=geomAndNot(SN1 SN_1)
   SP_3 =geomAndNot(SP_31 SP_2 )

   SP_new = geomSize(geomSize( SP_2 0.68 ) -0.18)
   SN_new = geomSize(geomSize( SN_1 0.68 ) -0.18)
   SN_new1= geomSize(geomSize( SN_3 0.68 ) -0.18)
   SP_new1= geomSize(geomSize( SP_3 0.68 ) -0.18)

   saveDerived( SP_new ("SP" "drawing" ) )
   saveDerived( SN_new ("SN" "drawing" ) )
   saveDerived( SN_new1 ("SN" "drawing" ) )
   saveDerived( SP_new1 ("SP" "drawing" ) )

给版图添加SN,SP层，在layout中，Verify-->DRC-->把脚本添加进去（Rules File)-->Apply