[vcf-midatlantic] Can anyone identify this mystery IC

[Christian Liendo]

please don't this is interesting

On Sun, Aug 21, 2022, 12:53 PM Douglas Crawford via vcf-midatlantic <
vcf-midatlantic at lists.vcfed.org> wrote:

>
> Very good. Better images coming soon.
> We'll take it offline unless someone chimes in.
>
> DC
>
> On 8/21/2022 12:50 PM, Dave McGuire via vcf-midatlantic wrote:
> >
> >    Yes, but we should be able to determine everything, or almost
> > everything we need to know from that layer.  We'd need better and
> > higher-resolution photos.
> >
> >               -Dave
> >
> > On 8/21/22 12:48, Douglas Crawford via vcf-midatlantic wrote:
> >> Ah, now we are getting somewhere.
> >> We can only guess then, from the remaining metalization layer
> >> correct?  Educated guess?
> >>
> >> On 8/21/2022 12:43 PM, Dave McGuire via vcf-midatlantic wrote:
> >>> On 8/21/22 12:39, Douglas Crawford via vcf-midatlantic wrote:
> >>>> These are the transistors?
> >>>> https://imgur.com/aLpqVpE
> >>>
> >>>    I'd need to look more closely, but those appear to be clusters of
> >>> transistors, six of them.  They are likely gates.
> >>>
> >>>> I got one additional response from another designer:
> >>>> "Looks like some kind of gate array with only the metalization layer
> >>>> being clearly visible. I worked on alot of these in the late 70's. I
> >>>> have no explanation for the bonding pad structures."
> >>>
> >>>    Agreed; this has either had its passivation layer removed, or it
> >>> had never been applied.  I suspect the latter, as it would've been
> >>> removed with acid, and there isn't so much as a trace of debris from
> >>> that.
> >>>
> >>>              -Dave
> >>>
> >
> >
>