A lot of that is the lack of SRAM scaling. There’s still quite a bit of improvements in the back end (metal traces). That aside, if foundries adopted say a 1T-1C SRAM we’d see a pretty rapid density doubling

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smallmancontrov 6 hours ago | parent | next [-]

Is 1T1C SRAM a technological thing or does it mean "persuade designers to use DRAM in the many cases where the retention contract could be timeboxed with a bit of extra thought and cross-team haggling"?

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the8472 6 hours ago | parent | prev | next [-]

MRAM is 1T, non-volatile and supposedly has nanosecond-scale write times so it naively seems like it'd be an ideal SRAM replacement. But I guess shrinking MTJ is more difficult than other components or there are some other limitations.

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tliltocatl 5 hours ago | parent | prev [-]

> 1T-1C SRAM

Aka eDRAM? It was a thing back on 14nm node, but AFAIR not so much anymore. The 1C part is hard to get right in a way that is compatible with a logic process.

	▲	to11mtm 3 hours ago \| parent [-]
		It gets confusing... eDRAM isn't the same as 1T-SRAM, which isn't quite the same as 1T-1C SRAM... But overall they run into the same problems that you mention; it's just too hard to get a capacitor in play. There is Zeno Semi's Bi-SRAM, buuuut it hasn't seemed to catch on for one reason or another.