Roma said:
I know a person who is an investor of MoSys and other technological companies, we talked about Wii U a few days ago and I became surprised with a comment from him about the new console: "Wii U uses 28nm manufacturing process from NEC and 1T-SRAM from MoSys" I asked him how he could know it and he told me that this information have been shared to the investors of MoSys because Nintendo partnership is the more important one for them and any signal of losing the deal can be very dangerous for the health of MoSys business.
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so what does 28nm something, something mean?
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All electronics are based on P-N junctions, which are pieces of silicon that have excess electrons on one side (n-type) and fewer elctrons on the other (p-type) this means that current will find it much easier to flow in one direction than the other - electrons trying to go from the p-type to the n-type have to overcome the electric force to get there. By arranging these P-N junctions, we can create logic gates. An example of a logic gate is an OR gate - there are two input wires, and if current is flowing through one wire, or the other, then current will flow through the output. This allows us to compute stuff.
The 28 nm process refers to the fact that each P-N junction is 28 nm accross. There are 1000 000 000 nm in a meter.
In terms of applications, this is a simplification, but basically, using 28 nm instead of 45 nm means that the entire processor will be approximately 28/45 times the size (62%), and will put out 62% of the heat.
EDIT: I was slightly wrong, 28 nm is half the distance between two PN junctions, not the width of each.