Patent ID: 9706639
Date: 2017-07-11
CPC Classifications: H01L,H05K

Claim:
1. A circuit board comprising: a core layer comprising a first surface and a second surface opposing the first surface; at least one first build-up layer formed on the first surface, and comprising a first conductive pattern and a first conductive via; at least one second build-up layer formed on the second surface, and comprising a second conductive pattern and a second conductive via; a cavity formed to pass through the core layer, the first build-up layer and the second build-up layer; a heat dissipation unit disposed inside the cavity so as to form a space between an inner wall of the cavity and the heat dissipation unit; and an outer layer formed on a surface of the first build-up layer and a surface of the second build-up layer and formed in the space, the outer layer being connected to the heat dissipation unit and comprising a solder resist.