(1)定义pitch:用inter metal min width + min spacing 定义1pitch大小
例如:tsmc018bcd 1P6M inter metal : min width=0.28um,min spacing=0.28um,那么pitch=0.56um
(2)数字库的height and width 必须是pitch的整数倍
例如:13pitch(13x0.56um),14pitch(14x0.56um)
(3)上下两侧要求
contact center and pickup ring must be in the center of prboundry
(4)左右两侧要求
a.管子的active 到prboundry距离要>=1/2 active spacing
b.上下两个pickup ring 左右两边和prboundry 重合,其左右两边的contact中心 到prboundry的间距等于0.5pitch
(5)注意metal1宽度
metal1 间距和宽度不要按照最小的留,因为出来的线要用metal2,所以要用inter metal 的width and spacing