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I wondered how 7nm compares to the size of single silicon atoms. Google says the van der Waals radius of a silicon atom is 210pm. This translates to around 30 a
by _nalply 9y ago
I wondered how 7nm compares to the size of single silicon atoms. Google says the van der Waals radius of a silicon atom is 210pm. This translates to around 30 atoms for 7nm, considering about 20% spacing between atoms. However I am not a chemist, so perhaps I am wildly off. Anyone here can give some elucidation?
- qubex 9y agoIf I am not mistaken, a 14nm feature is about 20 or so Si atoms wide, so a 7nm feature would be about 10 or so Si atoms wide. If this is correct, clearly the next process node after 7nm (3.5nm, presuming halving each time) would be the last process node that allows an integer breadth (5 Si atoms). Beyond that you'd be down to non-integer feature breadths (or alternatively, non-integer average breadths with wide variances).