Patent ID: 8804352

Claim:
A circuit board assembly comprising: a motherboard having a first engaging hole; a first daughterboard; a first metal bar of which two ends are respectively fastened to the motherboard and the first daughterboard, such that the first metal bar is electrically connected between the motherboard and the first daughterboard, and the first metal bar has a first through hole; a first rivet having a first threaded hole and a first engaging portion, wherein the first engaging portion surrounds a periphery of the first threaded hole and is engaged in the first engaging hole; and a first fastening member fastened into the first threaded hole after subsequently passing through the first through hole and the first engaging hole, wherein the first metal bar is supported between the motherboard and the first daughterboard, so as to position the first daughterboard separately over the motherboard and make the first daughterboard substantially perpendicular to the motherboard.