Ball bonding method on a chip

摘要

A ball bonding method on a chip mainly comprises steps of: a wire is burned to form a ball on a capillary; the capillary is moved down to a second bonding point for ball bonding; and the capillary is moved up in a vertical direction thereby pulling the tip of the ball to be cut such that the ball has a uniformly body shape and tip height. Therefore, the ball provides uniform body shape and tip height for wire bonding at a second bonding point under lower variability conditions thus increasing the reliability of products.