Head-in-Pillow BGA Defects Head-in-Pillow BGA Defects. Head-in-pillow (HiP), also known as ball-and-socket, is a solder joint defect where the solder paste deposit wets the pad, but does not fully wet the ball. This results in a solder joint
Investigation of Pad Cratering in Large Flip-Chip BGA using Acoustic Emission SMTnet Express January 3, 2013, Subscribers: 26072, Members: Companies: 9076, Users: 34113 Investigation of Pad Cratering in Large Flip-Chip BGA using Acoustic Emission