22 Jun
2000
22 Jun
'00
7:59 a.m.
BTW, I also have for sale a post-namechange machine
from a company once
known as "Thinker Toys". $20 with local pickup for machine plus printer
plus terminal (missing keyboard). $30 for machine by itself.
HINT: KFC and Thinker Toys were both in Berkeley, and moved
south once they became successful.
That would be Morrow Designs... George should've kept the Thinker Toys
thing, and put a hit out on the Tinker Toys lawyers.
I am the proud owner of two Thinker Toys products, the Wunderbus, and
the EconoRAM IV (hope that's the right model, this was one of those
really EARLY dynamic RAM boards; the ceramic gold-topped versions of
these chips worked fine, the but the plastic ones had trouble forgetting
things when they got hit by cosmic rays).
-dq
22 Jun
22 Jun
8:15 a.m.
I am the proud owner of two Thinker Toys products, the
Wunderbus, and
the EconoRAM IV (hope that's the right model, this was one of those
really EARLY dynamic RAM boards; the ceramic gold-topped versions of
these chips worked fine, the but the plastic ones had trouble forgetting
things when they got hit by cosmic rays).
It was the gold eutectic weld that was the source of alpha particles
that were the concern at the time. The later problem was Dram timing
problems and there were fixes.
Allison
8:58 a.m.
It was the gold eutectic weld that was the source of
alpha particles
that were the concern at the time.
No. The weld was not a problem. The ceramic emitting alpha particles
was a problem. This was solved by adding or changing the passivation layer
on the top side of the die. It doesn't take much to stop alpha particles.
The die and lead frame are thick enough that alpha particles from the ceramic
on the bottom of the package don't affect the memory.
However, alpha particles didn't start to be a problem for DRAM until
the 64Kbit generation.
8802
days inactive
8802
days old
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allisonp＠world.std.com -
dhquebbeman＠theestopinalgroup.com -
eric＠brouhaha.com