Reply to post: There are real limits to silicon technologies

Moore's Law isn't dead, chip boffin declares – we need it to keep chugging along for the sake of AI


There are real limits to silicon technologies

It's all very well to talk of muliple layers (for memory chips) but there are physical limits:

1. Transistors cannot be made much smaller (only a few electrons per gate);

2. Larger chips are more likely to have defects so there is an incentive to minimise the chip's area;

3. So there is a limit to the two-dimensional organisation and sizing of a chip;

4. Use of the third dimension (multiple layers) depends on what those layers are used for: if it's mostly single access memory then only a tiny proportion is active and scaling is feasible; if (highly) parallel processing (or memory access) is the aim then the need for heat dissipation is a severe limitation to the number of active elements per unit volume.

Interesting that wetware, which does operate in 3 dimensions, has inbuilt cooling thanks to cardiovascular circulation.

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