1. techlef若有OVERLAP,则不需要修改,若没有OVERLAP,则需要添加如下
2. 需要在MACRO的LEF中,在OBS添加不规则形状的坐标
可以用POLYGON,也可以用RECT
3.在MW上建库时记得把case打开,然后cell Library->Lef In时记得打开Boundry From OVERLAP