Patent ID: 6220499
Filing Date: 2001-04-24
Classification: H01L,H05K,Y02P

Abstract:
A method for assembling a chip carrier to a semiconductor device having C-4 solder connections, the method comprising the steps of:forming a plurality of solder shapes on a nonplanar surface of a chip carrier;planarizing the plurality of solder shapes resulting in the plurality of solder shapes having a planar surface, all of the planarized solder shapes being in the same plane;placing a semiconductor device having C-4 solder connections on the chip carrier with the C-4 solder connections aligned with the plurality of planarized solder shapes; andheating the plurality of solder shapes and C-4 solder connections to cause melting of the plurality of solder shapes and C-4 solder connections and bonding of the chip carrier and semiconductor device.