A main board suitable for slim configurations is disclosed. The main board includes a multi-layer Printed Circuit Board (PCB) in which at least one recess is formed, a first integrated circuit placed in the recess, and a molding that covers the first integrated circuit and the bottom of the recess. The main board further comprising a cover over said recess, said cover being a second integrated circuit or a second PC board, which may further having attached an integrated circuit positioned within the recess.