✧✦Catherine✦✧Feb 28
today I learned that we (as a civilization) now can put 16 silicon flash dice into a single 700µm microSD card on a commercial scale https://www.ose.com.tw/en/ic-services/memory-product-package/microsdsd
Show thread✧✦Catherine✦✧Feb 28

if you think that the precariously balanced tower of flash above is an inaccurate representation of what's going on, i can reassure you that
(a) this is exactly how it looks like, and
(b) SK Hynix is up to 24 layers already (not sure in what application)

https://news.skhynix.com/semiconductor-back-end-process-episode-4-packages-part-2/

Show threadAndrew ZonenbergFeb 28
@whitequark also each flash die has several hundred layers of stacked bit cells
Show thread✧✦Catherine✦✧Feb 28
@azonenberg yep! Samsung got up to 400 layers last year
Show thread0xC01DC0FFEEMar 1
@whitequark @azonenberg No fucking way, how are those even economical to manufacture? 
Show threadroukemap
@0xC01DC0FFEE @whitequark @azonenberg The storage layers don't need any individual patterning by photolithography, just careful thickness control in the deposition. There's some other tricky bits, but that's one of the big wins.
Mar 1 at 12:52amWeb