[vcf-midatlantic] Can anyone identify this mystery IC

[Dave McGuire]

   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
>>


-- 
Dave McGuire, AK4HZ
New Kensington, PA