Abstract: A heat dissipation device is used in a circuit board, where the circuit board includes a chip and at least one positioning hole disposed around the chip, and each of the positioning holes has a bare metal area on its periphery. The heat dissipation device includes a heat dissipation element, a conductive element and at least one fixing part. The heat dissipation element is disposed on the chip; the conductive element is connected electrically to the bare metal area of the circuit board and the heat dissipation element respectively; the fixing part passes through the fixing holes and is connected to the positioning hole, so as to fix the heat dissipation element to the circuit board. A circuit board is also provided, which includes a substrate, a chip, a positioning hole and the heat dissipation device.

Abstract: A flexible flat cable includes conductive wires disposed on a first surface of an insulation layer, and a cover shield covering an opposite second surface and side surfaces of the insulation layer. An electrical connector includes an insulation case defining an insertion space for receiving an insertion portion of the flexible flat cable, conductive terminals disposed on the base and contacting respectively with the conductive wires, and a ground unit. The ground unit includes a contacting portion disposed in the insertion space and contacting with the cover shield of the flexible flat cable, and a conductive portion extending out of the insulation case for grounding the flexible flat cable.

Abstract: A flexible flat cable includes conductive wires disposed on a first surface of an insulation layer, and a cover shield covering an opposite second surface and side surfaces of the insulation layer. An electrical connector includes an insulation case defining an insertion space for receiving an insertion portion of the flexible flat cable, conductive terminals disposed on the base and contacting respectively with the conductive wires, and a ground unit. The ground unit includes a contacting portion disposed in the insertion space and contacting with the cover shield of the flexible flat cable, and a conductive portion extending out of the insulation case for grounding the flexible flat cable.

Abstract: A heat dissipation device is used in a circuit board, where the circuit board includes a chip and at least one positioning hole disposed around the chip, and each of the positioning holes has a bare metal area on its periphery. The heat dissipation device includes a heat dissipation element, a conductive element and at least one fixing part. The heat dissipation element is disposed on the chip; the conductive element is connected electrically to the bare metal area of the circuit board and the heat dissipation element respectively; the fixing part passes through the fixing holes and is connected to the positioning hole, so as to fix the heat dissipation element to the circuit board. A circuit board is also provided, which includes a substrate, a chip, a positioning hole and the heat dissipation device.

Abstract: A heat dissipation device is used in a circuit board, where the circuit board includes a chip and at least one positioning hole disposed around the chip, and each of the positioning holes has a bare metal area on its periphery. The heat dissipation device includes a heat dissipation element, a conductive element and at least one fixing part. The heat dissipation element is disposed on the chip; the conductive element is connected electrically to the bare metal area of the circuit board and the heat dissipation element respectively; the fixing part passes through the fixing holes and is connected to the positioning hole, so as to fix the heat dissipation element to the circuit board. A circuit board is also provided, which includes a substrate, a chip, a positioning hole and the heat dissipation device.

Abstract: A heat dissipation device is used in a circuit board, where the circuit board includes a chip and at least one positioning hole disposed around the chip, and each of the positioning holes has a bare metal area on its periphery. The heat dissipation device includes a heat dissipation element, a conductive element and at least one fixing part. The heat dissipation element is disposed on the chip; the conductive element is connected electrically to the bare metal area of the circuit board and the heat dissipation element respectively; the fixing part passes through the fixing holes and is connected to the positioning hole, so as to fix the heat dissipation element to the circuit board. A circuit board is also provided, which includes a substrate, a chip, a positioning hole and the heat dissipation device.