PURPOSE: A method for manufacturing a printed circuit board is provided to block electromagnetic wave emitted from a board to the side by forming a shielding layer on plural unit substrates. CONSTITUTION: A motherboard divided by plural unit boards is provided(S110). A slot is formed along the border of the unit board area in order to form a bridge on a motherboard(S120). A shielding layer is formed on a slot inner wall(S130). The bridge is cut and is separated from the motherboard. The motherboard is plated and a plating layer is formed. A ground circuit is formed in the internal layer of the unit board.
