Patent ID: 8853552
Filing Date: 2014-10-07
Classification: H01L,H05K,Y10T

Abstract:
1. A multilayer printed wiring board, comprising: a first interlayer insulation layer comprising a first resin insulative material; a first conductive circuit formed on or in the first interlayer insulation layer; a second interlayer insulation layer comprising a second resin insulative material and formed on the first interlayer insulation layer and the first conductive circuit, the second interlayer insulation layer having a surface on which a first concave portion, a second concave portion and a plurality of post portions formed in the second concave portion are formed; a second conductive circuit formed in the first concave portion of the second interlayer insulation layer such that the second conductive circuit has a surface substantially leveled with the surface of the second interlayer insulation layer; and a plane conductor formed in the second concave portion of the second interlayer insulation layer such that the plane conductor has a surface substantially leveled with the surface of the second interlayer insulation layer, wherein the second concave portion and the plurality of post portions in the second concave portion form a pattern such that the plane conductor is formed in the second concave portion with respect to the pattern.