Patent ID: 8119450
Filing Date: 2012-02-21
Classification: H01L

Abstract:
1. A method of interconnecting a chip to a substrate, the method comprising: forming bumps with a first metal that is devoid of any other metals, the bumps being formed on a first surface of the chip; forming spots with a second metal that is devoid of any other metals, the spots being formed on a first surface of the substrate; contacting each one of the bumps to a different spot to form bonding interfaces, wherein contacting comprises applying an adhesive to the first surface of the chip, and adhering the first surface of the chip to the first surface of the substrate with the adhesive; heating each bonding interface to a melting point of the second metal to melt a portion of the second metal from each of the spots; metallurgically reacting the first and second metals at the melting point of the second metal to increase the temperature at each bonding interface above the melting point of the second metal; and creating a bonding phase at each bonding interface in response to the increased temperature, and curing the adhesive as the bonding phases at each bonding interface are created.