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A comment on IBM says it has made working versions of 7nm chips. Parent comment

Re:IBM says it has made working versions of 7nm chips by pjc50 on Thursday July 09, 2015 @05:24AM (#9856908)
You can't cross light beams at 7nm, if you had a "crossroads" structure" it would simply diffract round the corner and exit at all three other points.
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