Ciruit board assembly and shielding device

A circuit board assembly, comprising:

• a circuit board;
• a shielding frame, fixed to and protruding from the circuit board;
• a chip, disposed on the circuit board and located in the shielding frame;
• and
• a heat dissipating member, detachably disposed on the shielding frame,
• wherein when the heat dissipating member is disposed on the circuit board, the heat dissipating member leans against the shielding frame and covers the chip, and the shielding frame overlaps the heat dissipating member at a junction in a radiation direction from a center of the chip.

A shielding device, adapted to be disposed on a circuit board and cover a chip that is disposed on the circuit board, the shielding device comprising:

• a shielding frame, comprising a first encircled positioning portion;
• and
• a heat dissipating member, comprising a plate and a second encircled positioning portion that is disposed on the plate, wherein the second encircled positioning portion and the first encircled positioning portion correspond with each other in shape and position, so as to position the plate and the shielding frame,
• when the shielding device is disposed on the circuit board, an encircled abutting section of the shielding frame connected to the first encircled positioning portion leans against the circuit board, and the shielding frame and the heat dissipating member cooperatively cover the chip.