The mobile Ivy Bridge processors are not affected by this issue because they do not use a heat spreader between the chip and cooling system.
That aluminum frame and heat spreader explain why the phone gets so hot.
The PA-7100 is packaged in a 504-pin ceramic pin grid array that has a tungsten-copper heat spreader.
A high enough heat exchanger transfer coefficient is sufficient to avoid the need for a heat spreader.
The use of a heat spreader is an important part of an economically optimal design for transferring heat from high to low heat flux media.
The substrate is attached to a heat spreader by soldering the bottom copper layer to it.
The module can be embedded into a heat spreader, which distributes the component-generated heat onto a larger surface area.
In a complete system, heat spreaders can be part of the EMI containment design.
The package had a heat spreader with two studs to which the heat sink was bolted.
The most typical damage caused by rework is the separation of the component die heat spreader from its package.
