Patent ID: 7070087
Filing Date: 2006-07-04
Classification: B23K,H01L,H05K

Abstract:
1. A method of transferring solder bumps from a mold to a substrate having a plurality of pads comprising the steps of: providing a base member and a substrate located thereon; positioning a mold having a plurality of solder elements on said substrate such that each said solder element contacts a corresponding substrate pad and said mold contacts at least one compressible device having a thermally ductile buffer and located on said base member; causing said mold to compress said compressible device; heating said solder elements such that each said solder element melts and adheres to said corresponding substrate pad; and causing said compressible device to decompress and thereby separate said substrate and said mold while the solder elements remain in a molten state thereby causing each said solder element to adhere to said corresponding substrate pad in the form of a solder bump.