Antenna Rule疑惑求助

最近在做一个项目，Fab提供的Antenna Rule中有如下语句，看了半天不明白，有了解的帮忙解读一下，谢谢！
M1_DIO = NET AREA RATIO SD M1 > 0
M1_MIN_DIO = NET AREA M1_DIO > 0.203// minimum effective diode 0.203
ANT.c.a1 { @ (M1 perim*thickness / gate area) > 400 (without effective diode)
@ (M1 perim*thickness / gate area) > Ratio (with effective diode)
NET AREA RATIO M1 M1_MIN_DIO GATE > 0// no effective diode
[
！AREA(M1) * ！AREA(GATE) *
(
！AREA(M1_MIN_DIO)*
( PERIMETER(M1)*0.43/AREA(GATE) - 400 ) +
！AREA(M1_MIN_DIO)*
( PERIMETER(M1)*0.43/AREA(GATE) - AREA(M1_MIN_DIO)*400 - 2200 )
)
] RDB ANT.c.a1.rep M1 M1_MIN_DIO GATE
}

前面都好理解，但是从！开始就不是很理解了，！符号是啥意思啊?

怎么没人回啊

！ :returns a 1 (true) if its argument is 0;
returns 0 (false) otherwise.
example:
！AREA(poly)
:returns a 1 if there is no poly in the data capture window.
returns 0 if there is poly present in the capture window.