Patent ID: 7651021
Filing Date: 2010-01-26
Classification: B23K,H01L,H05K

Abstract:
1. A method comprising: providing a body with a plurality of bonding pads thereon; providing a plurality of solder microballs, the solder microballs including a coating thereon; flowing the solder microballs onto the body and positioning at least some of the solder microballs on the bonding pads; and heating the solder microballs on the bonding pads to reflow and form a joint between the solder microballs and the bonding pads; wherein the coating on the solder microballs comprises a magnetic material, and wherein the positioning the solder microballs on the bonding pads comprises applying a field selected from the group consisting of a magnetic field and an electric field, to attract the magnetic material on the solder microballs towards the bonding pads.