Patent ID: 7224046

Claim:
A multilayer wiring board comprising: a core portion including: a carbon fiber reinforced portion composed of a carbon fiber material and resin composition, and an in-core wiring portion which has a laminated structure of at least one insulating layer containing a glass fiber material and a wiring pattern composed of a conductor having an elastic modulus of 10 to 40 GPa, the in-core wiring portion being bonded to the carbon fiber reinforced portion; and an out-core wiring portion which has a laminated structure of at least one insulating layer and a wiring pattern, the out-core wiring portion being bonded to the core portion at the in-core wiring portion, wherein the carbon fiber reinforced portion has a first coefficient of thermal expansion, the in-core wiring portion having a second coefficient of thermal expansion which is greater than the first coefficient of thermal expansion, the out-core wiring portion having a third coefficient of thermal expansion which is greater than the second coefficient of thermal expansion.