使用SMIC IO库中IO时,DRC检查报如下错误,请问应该怎么解决呢
1.LU.3a-LU.3c define minimum space (S1) between NMOS and PMOS with either one of NMOS or PMOS AA connected to I/O pad (7.3.8 Fig.1)
For 3.3V N/PMOS connected to an I/O pad
Spacing between 3.3V NMOS and 3.3V/1.8V PMOS and
Spacing between 3.3V PMOS and 3.3V/1.8V NMOS
2.Double guard ring should be used to surround 3.3V N/PMOS connected to I/O pad.
Double guard ring definition:For NMOS, double guard ring includes P+ pickup (tied to
Vss) and N+ in NW (tied to Vdd).
For PMOS, double guard ring includes N+ pickup (tied to Vdd) and P+ in PW (tied to Vss)