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An added complication is that pure silicon in the required quantities is not cheap.
by Thetawaves 8y ago
An added complication is that pure silicon in the required quantities is not cheap.
- 6nf 8y agoThe amount of silicon we're talking about here is only a couple of cents per device
- Thetawaves 8y ago'16TB' of silicon at current rates is not a few cents, not even close.
- 6nf 8y agoSure it is, where do you buy your silicon wafers?
- Thetawaves 8y ago64L 3D NAND flash is about 4.40Gb/mm^2. 16TB = 131,072Gb. 29,789mm^2. 70,686mm^2/std 300mm wafer. Roughly 2 dies/wafer, with exceptional packing, and don't account for defect rates. Average $0.74/in^2 109.56in^2/std 300mm wafer 81$/std 300mm wafer roughly 40$ in materials BEFORE you even start talking about the processes to build up 64 layers, and everything else.
- 6nf 8y agoBig fabs don't pay $80 for one 300mm wafer