If you have ever done PCB design, you must have encountered these scenarios—smooth routing for BGA, yet experiencing packet loss in high-speed links during testing; multilayer boards warping after production; and a significant drop in yield during soldering… Many times, these issues are not due to the chip or the board manufacturer’s process, but rather due to poorly designed fan holes. Today, we will share 19 practical experiences to help you thoroughly understand PCB fan hole design, ensuring your boards pass production on the first attempt…