Abstract:
Making a heat sink and printed circuit board assembly by providing a heat exchange element on the heat sink which lies in heat exchange contact with the heat sink and passes therethrough. After locating the board and heat sink in relative positions apart and with the heat exchange element aligned with an electronic component on the board, a settable thermally conductive compound is injected through a hole in the heat exchange element to bond it to the electrical component. The heat sink is detachable from the heat exchange element to expose the side of the board carrying the components so that maintenance or repair may be performed. Subsequently the heat sink is returned into its position in the assembly.
Abstract:
A thermal connector for conducting heat from microelectronic components such as semiconductor chips to a heat sink. The connector includes a large number of flexible thermal conductors (94, 96). The connector may be fabricated by a process which includes fabrication of the conductors as flat strips, bonding of the conductors to a pair of opposed planar sheets and vertically moving the sheets away from one another to expand the conductors vertically to their final three-dimensional configuration.
Abstract:
A system for directly connecting one integrated circuit to another achieved by depositing gold onto the bonding pads of both integrated circuits, aligning the respective bonding pads and biasing both circuits into gas-tight, electrically conductive relation through the use of an initial compression force and a spring assembly. The gold bumps deposited on the bonding pads include ridges to ensure an optimal gas-tight seal. Alignment posts are also inserted through the host integrated circuit, which match notches cut into the periphery of the target integrated circuit, to ensure proper polarization and mating of the bonding pads of each integrated circuit. The integrated circuits and spring assembly are housed, and thus held together by, a carrier assembly. The carrier assembly also serves to dissipate heat generated by the integrated circuits, adapts for mounting on a printed circuit board, and includes a ferrule over an optical sensing area provided on the host integrated circuit.
Abstract:
A packaging and cooling assembly for integrated circuit chips includes a base (14) for reception of one or more circuit chips (12), and a combination heat sink and cover (28) for attachment to the base (19). The circuit chips (12) are mounted circuit side down on the base (14), and include flexible lead frames (20) for attachment to bonding pads on the base (14). Compliant cushions (44) that generally conform to the shape and size of the chips (12) are held loosely between the circuit sides of the chips, and the base (14). The heat sink (28) engages the back sides of the circuit chips (12) when it is attached to the base. This causes the chips (12) to compress the compliant cushions (44), thereby holding the chips firmly in position, and forming a high thermal conductivity interface between the chips and the heat sink (28). To further enhance the heat transfer characteristics of the interface, a thin film of fluid (50) is coated on the back sides of each chip (12) to fill in the microvoids which result from asperity contact of the heat sink (28) and chip mating surfaces. A sealing gasket (34) is provided between the heat sink (28) and the base (14) to form a protective enclosure for the chips. Intermediate housings or heat spreader structures may alternatively be disposed between the chips (12) and the heat sink (28).
Abstract:
A method of manufacturing is provided that includes placing a thermal management device (75) in thermal contact with a first semiconductor chip (35) of a semiconductor chip device (10). The semiconductor chip device includes a first substrate (60) coupled to the first semiconductor chip. The first substrate has a first aperture (70). At least one of the first semiconductor chip and the thermal management device is at least partially positioned in the first aperture.