May 5, 2010 #1 L lefpcb Newbie level 5 Joined Dec 29, 2009 Messages 10 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location shenzhen Activity points 1,340 20 layer BGA PCBs 20 layer BGA board thickness 4.omm hole size:0.25mm 4\4mil Immersion Ni\Au https://obrazki.elektroda.pl/99_1273030787.jpg https://obrazki.elektroda.pl/73_1273030787.jpg
20 layer BGA PCBs 20 layer BGA board thickness 4.omm hole size:0.25mm 4\4mil Immersion Ni\Au https://obrazki.elektroda.pl/99_1273030787.jpg https://obrazki.elektroda.pl/73_1273030787.jpg