On 02/11/2015 11:05 PM, Chuck Guzis wrote:
On 02/11/2015 05:41 PM, Jon Elson wrote:
Well, the original ones were as you say, but
there was a
lot of work
going on to make
massive improvements.
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.
Look up vertical Bloch line memories. I think he was at
IBM, and did some amazing
stuff in the area of planar magnetic memory technology.
They were just touching
the surface of what could probably be done in making them
smaller, and applying
IC fabrication techniques to the magnetic memories. I think
the magnetic drive
lines could also be integrated onto the chip, reducing the
inductance and power
required. Anyway, Bloch had developed some stuff that could
have advanced
WAY beyond the original bubble memories.
Jon