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
SMT Express, Issue No. 3 - from SMTnet.com Volume 1, Issue No. 3 Wednesday, August 18, 1999 Featured Article Return to Previous Page BGA REWORK Earl Moon Proof Of Design (POD) PRE OPERATIONAL REQUIREMENTS The following requirements shall