imitation game movie

Jon Elson elson at
Wed Feb 11 23:44:53 CST 2015

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.


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