3D Stacking – The Future of Technology

3D Stacking – The Future of Technology


We all want performance from our devices and microprocessor companies are investing
billions of dollars in R&D. They are coming up with really innovative and revolutionary technologies
that are going to make Moore’s law to get to its saturation point.

As more and more devices are going handheld that companies have to decide whether to have a headphone jack or a slightly bigger battery internal components of our devices has to be miniaturized. To tackle this problem major microprocessor giants are coming up with a new form of circuit fabrication packaging which does not require to have discrete removable auxiliary components such as RAM like what we have today.

For example, in 2019 both AMD and Intel unveiled chipsets from this paradigm, AMD called it their chipset design and intel named it FOVEROS, which had the codename ‘Lakefield‘ for this. These kinds of CPU‘s are more likely to come in HPC (high-performance computing) and server parts than in the mainstream consumer market. FOVEROS was designed to be a low power performance-centric chipset.

Related | Intel Launched ‘Lakefield’ Hybrid CPUs for New Generation Laptops

Last year Microsoft confirmed to come equipped with this chipset in its revolutionary 2 screen folding Surface Duo. To be honest, I think it was more of a marketing move to lower the market share that Qualcomm has with their ARM-based chips like 8c X which were designed for these kinds of devices Intel’s implementation. These chips had one flaw instead of having direct interaction between the processor and memory stacked like floors of building memory addresses.

Also, the content had to be passed by lift like pillars in the 3D packaging with one logic box layer storing content from memory in a manner similar to the buffer cache in UNIX systems. But, it hardly differs from Intel’s previously announced 2.5D technology which had video memory instead of main memory. Nevertheless, they made techies excited and motivated others in the same industry to come up with their own implementation which at the end of the day going to make our devices faster or I should rather say space-efficient.

IBM to Produce Micron's Hybrid Memory Cube in Debut of First Com
(Image Credits: IBM)

For now, what we should be excited for is have a day and have an eco-system where we can have a set processor from different vendors that we could stack on to one another to have better performance from those processors instead of getting bottlenecked by caches provided by the processor which is fixed for its lifecycle.

Which could seem to be a bit unbeneficial because they might lose their monopoly, but this
was the main selling point for ARM processors as manufacturers had the flexibility and
that is why you can never spot a Homosapien home holding a phone that has Intel CPU. It might have Intel’s modem (iPhones for instance) and that is why they played a great gamble
on foldable devices because they might be the next-gen that people might switch to after

In conclusion, SOC needs to have different subsystems for encryption, modems and
so on, a space-efficient technique is required otherwise cost would blow the roof. 3D
stacking could minimize the cost and help Intel gain a much-needed market share in portable
devices which in a way going to help us get a better product!

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