11 Feb
2015
11 Feb
'15
9:05 p.m.
On 02/11/2015 05:41 PM, Jon Elson wrote:
On 02/11/2015 01:20 PM, Chuck Guzis wrote:
I don't think so--density was a problem with bubble memories as with
FRAM. I suspect that the geometry needed to hold a charge can simply be
smaller and easier to fabricate.
Of course, magnetic recirculating memory is still with us (as disks),
but I think the sunset is not too far off.
--Chuck
On 02/11/2015 10:51 AM, Jon Elson wrote:
Well, the original ones were as you say, but there was a lot of work
going on to make
massive improvements. Yes, you sure would not want to use them as main CPU
memory. But, as a solid state disk replacement, as flash memory sticks
are used
today, they might have significant advantages.
I never understood why bubble memory didn't
continue to progress.
Vertical
Bloch line memory might have eventually developed to the capacity of
modern flash memories, and probably not had the wear-out problem.
They never would have reached the read performance of flash, but might
have kept up with the write performance.
Bulky, power-hungry and expensive, mostly--and slow random-access, as
it was recirculating.
On the other hand, the only thing that seems to
be holding MRAM and
FRAM back is density. TI is aggressively marketing MSP430 MCUs with
embedded FRAM.
Yes, the FRAM looks very interesting, they are just starting about 20
years behind
other technologies. But, they may catch up.