Patent ID: 6350669
Filing Date: 2002-02-26
Classification: H01L,H05K,Y02P

Abstract:
A method for bonding a BGA package to a circuit board, comprising the steps of:(1) preparing a grid array of solder balls, including: a first group of solder balls of a specific reflow collapse degree; and a second group of solder balls of a specific reflow collapse degree less than the reflow collapse degree of the first group of solder balls; (2) arranging the first and second groups of solder balls in an interspersed manner in the grid array; (3) attaching the first and second groups of solder balls to corresponding bond pads on the BGA package and the circuit board; and (4) performing a solder-reflow process to reflow the first and second groups of solder balls over associated bond pads on the circuit board.