1. The Nanoroute Router honors litho routing halos (addRoutingHalo -lithoHalo). It only allows planar connections to macro pins inside the litho routing halos. It does not allow any other wire or via insertion above and below the litho halo.
2. Specifies that all one-site fillers do not have diffusion obs. For designs in which all one-site fillers without diffusion obs, you can use this option to preserve enough spacing during refinePlace for later filler insertion. This option can override the setting of -place_detail_legalization_inst_gap to 0.
这是setPlaceMode -place_detail_use_no_diffusion_one_site_filler命令的描述,请问这里面说的diffusion obs是什么意思呢,还有类似的implant obs,这两个是什么意思呢