Patent ID: 7726546
Filing Date: 2010-06-01
Classification: B23K,H01L

Abstract:
1. A bonding apparatus that bonds an electrode of a semiconductor die with an electrode of a substrate, the apparatus comprising: a bump formation mechanism that forms a bump on the electrode by injecting microdroplets of a metal nano paste onto the electrode; a primary bonding mechanism that carries out primary bonding to the electrodes in a non-conductive state by pressing a bump formed by injecting microdroplets of a metal nano paste in which metal nanoparticles surface-coated by a dispersant are contained in a binder in a paste form on one of the electrodes against the other electrode, and by heating each bump up to a predetermined temperature that is higher than a room temperature and lower than the binder removal temperature of the metal nano paste; and a secondary bonding mechanism that includes a pressurizing unit that pressurizes the primary bonded bump in a bonding direction, and that carries out secondary bonding so that the electrodes become conductive by heating the bump up to a temperature higher than a binder removal temperature of the metal nano paste and a dispersant removal temperature of the metal nano paste, thereby removing the binder and the dispersant while pressurizing and sintering the metal nanoparticles in the bump.