Patent ID: 7505281

Claim:
A multilayer wiring board comprising: a first insulating film having a first major surface and a first patterned metal wiring film extending along said first major surface; a second insulating film having a second major surface and a second patterned metal wiring film extending along said second major surface, said second insulating film overlying said first insulating film and at least said second patterned metal wiring film contacting said first insulating film; a plurality of solid metal interconnects conductively connecting said first patterned metal wiring film to said second patterned metal wiring film, said solid metal interconnects extending through at least one of said first and second insulating films in a direction transverse to said first and second major surfaces; a microelectronic element disposed between said first and second patterned wiring films, said microelectronic element having bond pads conductively connected to said first patterned metal wiring films; a plurality of solid metal bump interconnects conductively connecting said bond pads of said microelectronic element with said first patterned metal wiring film, wherein said solid metal bump interconnects consist essentially of at least one metal selected from the group consisting of copper and nickel; and a plurality of external contacts exposed at one or more external surfaces of said multilayer wiring board, said contacts being at least one of (a) conductively connected to at least one of said first and second patterned metal wiring films; or (b) defined by at least one of said first and second patterned metal wiring films.