摘要:
A method of assembling flip chips in a package. Solder bumps are attached to a first flip chip and to a second flip chip. A package substrate having first and second opposing sides is provided, and the first flip chip is electrically connected to the first side of the package substrate using the solder bumps attached to the first flip chip. The second flip chip is also electrically connected to the second side of the package substrate using the solder bumps attached to the second flip chip. The position of the second flip chip is substantially opposed to and aligned with the position of the first flip chip. The first and second flip chips are under filled with a heat conductive epoxy. The first flip chip is encapsulated against the first side of the package substrate, and the second flip chip is encapsulated against the second side of the package substrate. Solder balls are attached to the first side of the package insert. By attaching the flip chips to opposite sides of the package substrate, balancing the structure of the overall package, bending stress is reduced due to the flip chips having similar thermal coefficients of expansion. Additional benefits include improved electrical performance, reduced weight, and reduced size of the packaged circuit.
摘要:
An integrated circuit structure and a method for packaging an integrated circuit are described. The integrated structure includes an integrated circuit that is inverted and solder bump mounted to a substrate. An underfill is used to encapsulate the solder bumps and form a rigid support layer between the integrated circuit and the substrate. A heatspreader, which has larger planar dimensions than the integrated circuit, is centrally attached to an upper surface of the integrated circuit with a thermally conductive material. Lateral portions of the heatspreader extending beyond the edges of the integrated circuit are attached to the substrate and sides of the integrated circuit by a thermally conductive underfill material. The thermally conductive underfill material thus employed, among other things, provides a robust mechanical support to the heatspreader and integrated circuit structure and eliminates the need for additional support structures such as conventional stiffener rings.
摘要:
A temperature monitoring circuit for an integrated circuit on a monolithic chip, the temperature monitoring circuit comprising a temperature sensor disposed on the monolithic chip, a system monitor disposed on the monolithic chip, and electrically conductive traces for electrically connecting the temperature sensor to the system monitor. In this manner, the temperature on the monolithic chip can be monitored by the integrated circuit itself, and appropriate action can be programmed to occur upon attaining various set points or conditions.
摘要:
An integrated circuit having electrically conductive vias with a diameter of between about one micron and about fifty microns. Prior art vias have a diameter of between no less than 0.3 microns to no more than 0.8 microns. In this manner, stresses such as those that press down upon the top surface of the integrated circuit can be absorbed by the large vias and transferred past fragile layers, such as low k layers, so that the fragile layers are not damaged by the stresses.
摘要:
An integrated circuit structure and a method for packaging an integrated circuit are described. The integrated structure includes an integrated circuit that is inverted and solder bump mounted to a substrate. An underfill is used to encapsulate the solder bumps and form a rigid support layer between the integrated circuit and the substrate. A heatspreader, which has larger planar dimensions than the integrated circuit, is centrally attached to an upper surface of the integrated circuit with a thermally conductive material. Lateral portions of the heatspreader extending beyond the edges of the integrated circuit are attached to the substrate and sides of the integrated circuit by a thermally conductive underfill material. The thermally conductive underfill material thus employed, among other things, provides a robust mechanical support to the heatspreader and integrated circuit structure and eliminates the need for additional support structures such as conventional stiffener rings.
摘要:
To assemble a flip chip in a package, the back of the flip chip is coated with a heat conductive material and a heat conductive substrate is attached to the heat conductive material. Solder bumps are attached to the front of the flip chip and to a package substrate to mount the flip chip on the package, leaving a space between the flip chip and the package substrate. The space between the flip chip and the package substrate is under filled with a heat conductive media, and the flip chip is encapsulated against the package substrate with a peripheral mold such that at least a portion of the conductive substrate remains exposed. A final package is formed by electrical connectors attached to the package substrate.
摘要:
A method of packaging an integrated circuit. The integrated circuit is connected to a substrate, and a mold is applied to the substrate. The mold and the substrate define a cavity and at least one covered chase, and the integrated circuit is disposed within the cavity. A compound is injected into the cavity through one of the covered chases, underfilling and encapsulating the integrated circuit. In one embodiment the mold is then removed from the substrate. In an alternate embodiment the mold is fixedly applied to the substrate.