Patent ID: 9040836
Filing Date: 2015-05-26
Classification: H01L,H05K,Y10T

Abstract:
1. A wiring board comprising: a reinforced insulating layer containing (i) a reinforcing material including a woven cloth or a non-woven cloth and (ii) a resin material therein, the reinforcing material being impregnated by the resin material, the reinforced insulating layer comprising a first surface and a second surface opposite to the first surface; a first multilayer wiring structure disposed on the first surface of the reinforced insulating layer and comprising a first inner surface facing the first surface of the reinforced insulating layer and a first outer surface opposite to the first inner surface, the first multilayer wiring structure comprising: a second multilayer wiring structure disposed on the second surface of the reinforced insulating layer and comprising a second inner surface facing the second surface of the reinforced insulating layer and a second outer surface opposite to the second inner surface, the second multilayer wiring structure comprising: wherein a first electrode pad is disposed on the first outer surface of the first multilayer wiring structure, a second electrode pad is disposed on the second outer surface of the second multilayer wiring structure, a thickness of the reinforced insulating layer is 100 μm or less, and a thickness of each of the first and second insulating layers is 15-35 μm.