Patent ID: 6512680
Filing Date: 2003-01-28
Classification: H01L,H05K

Abstract:
A circuit substrate on which a semiconductor package is mounted, comprising:a semiconductor package having a circuit substrate, wherein a circuit element liable to discharge noise and a circuit element liable to be effected by the noise from outside are provided on a front side of said circuit substrate, and a plurality of electrodes electrically connected to said circuit elements through a through-hole are provided on a reverse side of said circuit substrate; a mother board electrically connected to said semiconductor package; and a solder pad portion electrically connected to said electrodes through a solder and draw-out lines extending from said solder pad portion provided on a front side of said mother board, wherein said draw-out lines connected to said circuit element liable to discharge noise are grouped and isolated from said draw-out lines connected to said circuit element liable to be effected by the noise from outside.