Patent ID: 9060455
Filing Date: 2015-06-16
Classification: H01L,H05K

Abstract:
1. A wiring board comprising: a first wiring layer; a first insulating layer formed on the first wiring layer and comprising a reinforcing material therein, the first insulating layer having a first opening; a contact layer formed on the first insulating layer and having a second opening communicated with the first opening, wherein the first wiring layer is exposed through the first and second openings; and a second wiring layer comprising a via and a wiring pattern connected to the via, wherein the wiring pattern is formed on the contact layer, and the via is filled in the first and second openings, wherein an adhesion property between the contact layer and the wiring pattern is higher than an adhesion property between the first insulating layer and the wiring pattern, a thickness of the contact layer is smaller than that of the first insulating layer, and the contact layer is higher in surface smoothness than the first insulating layer.