Patent ID: 6767616
Filing Date: 2004-07-27
Classification: H05K,Y10S,Y10T

Abstract:
A metal core substrate comprising:a core layer (10) comprising first and second metal plates (11, 12) layered by a third insulating layer (13) interposed therebetween; first and second insulating layers (20, 21) formed on said first and second metal plates, respectively; first and second wiring patterns (45, 46) formed on said first and second insulating layers, respectively; a first conductor (40) formed in a through-hole (22) penetrating said first insulating layer (20), said first metal plate (11), said third insulating layer (13), said second metal plate (12) and said second insulating layer (21) onto to insulating portions (23) with respect to said first and second metal plates, respectively, to electrically connect said first wiring pattern with said second wiring pattern; second conductor to electrically connect said first metal plate (11) with said first wiring pattern (45) and said second wiring pattern (46), respectively, by a via (44) penetrating said first insulating layer (20) and by a via (43) formed in a via-hole (28) penetrating said second insulating layer (21), said second metal plate (12) and said third insulating layer (13) onto to an insulating portion (29) with respect to said second metal plate (12); and a third conductor to electrically connect said second metal plate (12) with said second wiring pattern (46) and said first wiring pattern (45), respectively, by a via (42) penetrating said second insulating layer (21) and by a via (41) formed in a via-hole (24) penetrating said first insulating layer (20), said first metal plate (11) and said third insulating layer (13) onto to an insulating portion (25) with respect to said first metal plate (11).