Patent ID: 8367937
Filing Date: 2013-02-05
Classification: G11B,H05K,Y10T

Abstract:
1. A printed circuit board comprising: a first insulating layer; a first wiring layer that is formed on said first insulating layer; a second insulating layer that is formed on said first insulating layer to cover said first wiring layer; a second wiring layer that is formed on said second insulating layer to be positioned above said first wiring layer and constitutes with said first wiring layer a signal line pair; and a conductive first reinforcing layer that is formed on at least an upper surface of said second wiring layer and not formed on an upper surface of said first wiring layer and a lower surface of said second wiring layer, wherein a width of said first wiring layer is larger than a thickness of said first wiring layer, and a width of said second wiring layer is larger than a thickness of said second wiring layer.