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+--- Thread: CORVALLIS SILICON WAFER (/thread-9518.html)
CORVALLIS SILICON WAFER - ENRIQUE VELASCO - 11-17-2017 09:47 PM
Hi, I'm new here and it is amazing all information i can see around..
And i will start with my first question...
I do have a 4" Silicon wafer ( See photo ) , under microscope it reads:
Hp
Made in USA
Corvallis
The date is not clear, i guess it is from 1986 and an umbrella like logo.
anybody knows more about this ?
Thanks!!!
[attachment=5337]
RE: CORVALLIS SILICON WAFER - Martin Hepperle - 11-20-2017 02:59 PM
(11-17-2017 09:47 PM)ENRIQUE VELASCO Wrote: [...]
The date is not clear, i guess it is from 1986 and an umbrella like logo.
anybody knows more about this ?
Thanks!!!
At https://groups.io/g/VintHPcom/topic/hp_and_the_teddy/6385152?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,6385152 Everett Kaser wrote recently:
"I remember that some of the ICs made at the Corvallis Division had a small umbrella on the die."
Martin
RE: CORVALLIS SILICON WAFER - Paul Berger (Canada) - 11-21-2017 05:31 PM
(11-17-2017 09:47 PM)ENRIQUE VELASCO Wrote: Hi, I'm new here and it is amazing all information i can see around..
And i will start with my first question...
I do have a 4" Silicon wafer ( See photo ) , under microscope it reads:
Hp
Made in USA
Corvallis
The date is not clear, i guess it is from 1986 and an umbrella like logo.
anybody knows more about this ?
Thanks!!!
Just a guess but the layout of the individual dies in four uniform quadrants would suggest a memory device likely a ROM since it was made in Corvallis. Is there any numbers on the die other than the year?
Paul.