Abstract: A computer enclosure includes a chassis with a plurality of heat generating components installed therein and an airflow guide structure. The airflow guide structure includes a fan and a duct attached to the fan. A pair of airflow outlets aligned with the fan is defined in the duct. The duct includes a plurality of pivot panels pivotally attached at airflow outlets. The pivot panels are configured to guide airflow from the fan to different positions of heat generating components in the chassis.

Abstract: A heat sink for dissipating heat from a heat source, includes a base configured to connect with a heat source, and a plurality of fins positioned on the base. A cutout is defined within the plurality of parallel fins.

Abstract: A heat sink assembly includes a printed circuit board, an electronic component mounted on the printed circuit board, and a heat sink mounted on the printed circuit board for dissipating heat from the electronic component. The printed circuit board includes a heat-conduction layer. The heat sink includes a base configured to contact the heat-conduction layer, and a main body extending upward from the base configured to contact the electronic component. The cross section of the base is larger than the cross section of the main body. A plurality of fins extends from the main body.

Abstract: An electronic apparatus includes an enclosure (30), a circuit board (40), a fan module (20), and an air guiding element (10) mounted in the enclosure. The circuit board includes at least one heat generating component (41) thereon. The fan module has a fan (22) and an output opening (213) corresponding to the fan. The air guiding element comprises a resisting panel (11) and a guiding panel (12) comprises a free end that extends toward the output opening of the fan module. The at least one heat generating component and the output opening are on the same side of the resisting panel. The guiding panel defines a free end (127) and a connecting end (125) connecting the resisting panel. A plane defined by the ends of the guiding panel is aligned at an angle larger than 90 degrees relative to the resisting panel.

Abstract: A printed circuit board assembly includes a printed circuit board, a carrier, a semiconductor chip mounted on the carrier, a plurality of tin balls soldered between the printed circuit board and the carrier for transmitting signals, and a heat sink glued to the semiconductor chip to dissipate heat. A pressing portion is formed on the bottom of the heat sink and does not make contact with the semiconductor chip. The pressing portion contacts with the periphery of the carrier to reinforce the tin balls located between the printed circuit board and the carrier.

Abstract: An electronic device includes an enclosure (30), a circuit board (40), and an airflow guiding duct (10). The enclosure includes a bottom wall (31) and a rear wall (32) perpendicular to the bottom wall. The circuit board is mounted on the bottom wall of the enclosure. The circuit board includes a first heat generating element (41) and a second heat generating element (42) near to the first heat generating element. The airflow guiding duct includes two side panels (11) and a connecting panel (13) connecting a pair of side edges (112) of the two side panels. A first opening (17) is defined by a lower edge (131) of the connecting panel and lower edges (111) of the two side panels and corresponding to the first heat generating element. The lower edges of the two side panels and the lower of the connecting panel are in the same plane. The first opening is a predetermined distance from the circuit board and the airflow guiding duct is capable of allowing air flow from different directions.