Patent ID: 8115104
Filing Date: 2012-02-14
Classification: H05K

Abstract:
1. A method for manufacturing a circuit board, comprising the steps of: providing a substrate with a first surface and a second surface opposite to the first surface; forming a first metal layer on the first surface of the substrate, the first metal layer has a first surface and a second surface opposite to the first surface, the first surface of the first metal layer having a plurality of protrusion structures buried on the first surface of the substrate, wherein the second surface of the first metal layer has a first area defined thereon; forming an etch mask on the first area; etching the first metal layer so that the portions of the first metal layer protruding from the first surface of the substrate and exposed from the etch mask are removed; removing the etch mask from the substrate; and forming a solder mask on the first surface of the substrate and exposing the first area of the first metal layer.