Introduction: superior-density HDI PCBs for optical interaction have to have specific 3 mil/3 mil trace/Area, Rogers or Panasonic M6 substrates, and electrolytic hard gold end for reliable 8-layer, three–five cm² https://bookmarkindexing.com/story21554866/assortment-conditions-for-top-density-hdi-pcb-boards-in-optical-conversation