CORVALLIS SILICON WAFER

[ENRIQUE VELASCO]

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!!!

   

[Martin Hepperle]

(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_a...,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

[Paul Berger (Canada)]

(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.