Patent ID: 6214445
Filing Date: 2001-04-10
Classification: H01L,H05K,Y10T

Abstract:
A printed wiring board comprising a core substrate having sides, at least one insulating resin layer laminated on at least one side of the core substrate, and a wiring layer formed at least between (i) the core substrate and the at least one insulating resin layer or between (ii) two insulating resin layers, wherein said at least one insulating resin layer comprises a plurality of insulating resin layers; the core substrate comprising:a composite dielectric layer containing resin and a high-permittivity powder; anda plurality of metal layers disposed so as to sandwich the composite dielectric layer therebetween to thereby form a laminated capacitor, the high-permittivity powder contained in the composite dielectric layer comprising a powder of a material selected from the group consisting of BaTiO.sub.3, PbTiO.sub.3, PbZrO.sub.3, Pb(Ti, Zr)O.sub.3, Pb(Mn, Nb)O.sub.3, SrTiO.sub.3, and MgTiO.sub.3, and the composite dielectric layer further containing a metal powder selected from the group consisting of Ag, Au, Cu, Ag--Pd, Ni, W, and Mo.