alan.b.pearce@stfc.ac.uk wrote:
> 2102 1k bit x1 static RAM, N-MOS, geometry size unknown, introduced
> by intel in 1970s.

I remember those.  I once stacked 8 DIP on top of each other such that all
the pins were paralleled except the data lines.  I had bent the data pins
out so that they didn't stack, and wire wrapped a separate wire to each one=
..
Voila, 1K byte-wide RAM.

> Gleaning info from HP Journals for the time suggests that the devices
> probably used geometries around 7 micron, but would like to ascertain
> actual geometry sizes used.

These parts were in production long enough and from various vendors, that I
don't think you'll find a single geometry size.  There could very well have
been a die shrink over the life of the product.  In other words, you'll
probably need to know the manufacturer and the date code to know what the
geometry size is.

7 micrcon sounds a bit high, at least for 2102.  I remember in 1980 or so
the frontier was just around 1 micron.  Some research systems were
demonstrating sub-micron, but that was a big deal and wasn't ready for
production.  If I remember right (and I may not), around 2 micron was
considered pretty state of the art for production at the time.

--=20
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