Patent ID: 7606038

Claim:
A heat radiating structure for a printed circuit board, comprising: a substrate ( 12 ) with opposite first and second surfaces ( 12 a ; 12 b ) and conductor patterns ( 13 ) provided on at least one of surfaces ( 12 a ; 12 b ); at least one soldering land ( 22 ) for heat radiation in an area of the first surface ( 12 a ) where an electronic part ( 20 ) is to be mounted, at least one land ( 25 ) for solder absorption on the second surface ( 12 b ) and viaholes ( 24 ) with a first opening ( 24 a ) in the soldering land ( 22 ) for heat radiation and a second opening ( 24 b ) in the land ( 25 ) for solder absorption; a first unitary matrix of solder ( 36 ) including a solder layer ( 27 ) between the electronic part ( 20 ) and the soldering land ( 22 ) for heat radiation, the unitary matrix of solder ( 36 ) further including solder extensions ( 30 ) unitary with the solder layer ( 27 ) and extending through the viaholes ( 24 ) and a plurality of spaced apart solder depositions ( 31 ) unitary with the solder extensions ( 30 ) and spread onto areas of the land ( 25 ) for solder absorption adjacent the second opening ( 24 b ) of the respective viaholes ( 24 ) and adhering to the land ( 25 ) for solder absorption in a substantially flat manner; and a second unitary matrix of solder ( 41 ) at least partly covering portions of the solder depositions ( 31 ) adhering to the land ( 25 ) for solder absorption.