calibre里面关于metal2 antenna:
ANT.3 {
@ Maximum ratio of Metal2 perimeter area to related gate oxide area (COMP not present) > ^MaxMet2
antp_M2 = NET AREA RATIO M2_nodiode PERIMETER ONLY SCALE BY (STDval*1000) gate > MaxMet2 // M2 antenna
antp_M2a = NET AREA RATIO M2_nodiode PERIMETER ONLY SCALE BY (STDval*1000) gate > MaxMet2 ACCUMULATE // For PRINT purpose
antp_poly = NET AREA RATIO Poly2 antp_M2 > 0 // poly related to M2
antp_m1 = NET AREA RATIO Metal1 antp_M2 > 0 // m1 related M2
ORNET antp_m1 (ORNET antp_M2 antp_poly) // poly & metal as 1 error
NET AREA RATIO PRINT antp_M2a PANTM2.txt // print actual ratio to file
}