Bob Willis Defect of the Month explains solder joint voids and are they an issue to everyone? Bobs webinar guide to voids in solder joints and how to overcome them in manufacture is available online and covers all of the different voids and solutions from his archives see https://www.bobwillis.co.uk/product/online-webinar-archive-booking/
The video is just one of the Defect of the Month videos featured by IPC, SMTA and Circuits Assembly to help provide better understanding of process issues and help support training of younger engineers
Past Defect of the Month magazine pages are available online at Circuits Assembly magazine or the videos at https://www.youtube.com/user/MrBobwillis