Patent ID: 7185799
Filing Date: 2007-03-06
Classification: H01L,H05K,Y02P

Abstract:
1. A method of constructing an electronic assembly, comprising: forming a removable solder mask partially over a conductive power contact pad, of a first substrate, the solder mask leaving a plurality of lands of the conductive power contact pad exposed; attaching a plurality of power solder balls to the conductive power contact pad and a plurality of signal solder balls to conductive signal contact pads of the first substrate, the power solder balls being spaced from one another by a first distance and the signal solder balls being spaced from one another by a second distance which is larger than the first distance; removing the removable solder mask; locating the solder balls against terminals of a second substrate; heating the solder balls so that they melt, the power solder balls combining with one another while the signal solder balls remain disconnected from one another; and allowing the solder balls to cool so that they solidify.