Patent ID: 7947332

Claim:
A method of manufacturing a multilayer printed wiring board, the multilayer printed wiring board including a first prepreg and a printed wiring board, wherein the printed wiring board is a printed wiring board obtained by circuit processing of a metal-foil clad laminate obtained by (a) superimposing plural second prepregs obtained by impregnation-drying of a base material with a thermosetting resin composition, wherein the base material is a woven fabric, the thickness of the base material is 5-30 μm, and the thermosetting resin composition includes one or more types of resin material having a weight average molecular weight of 10000-1500000, (b) disposing a metal foil on both sides or one side thereof, and (c) heating and pressurizing; the method comprising: disposing said first prepreg on a surface of said printed wiring board; disposing a metal foil or a metal foil-clad laminate on a surface of said first prepreg; and performing heating and pressure-forming, wherein the printed wiring board is larger than the first prepreg.