Patent ID: 7674985

Claim:
A primed wiring board assembly comprising: a printed wiring board; a first component mounting portion on a first surface of the printed wiring board; a second component mounting portion on a second surface of the printed wiring board having at least a part overlapping with at least a part of the first component mounting portion; a ball grid array (BGA) component mounted on the first component mounting portion; a circuit component mounted on the second component mounting portion; and a supplementary component on the second surface of the printed wiring board configured to function either as a heat-sink or as a back plate to reinforce the first component mounting portion, wherein the heat-sink portion comprises a box-shape portion raised from reinforcement portion being in contact with the second surface of the printed wiring board for receiving the circuit component therein, the box-shaped portion of the heat-sink portion being integral with the reinforcement portion to form a reinforcement for the first component mounting portion of the printed wiring board.