RE: Commodore PLA equations (complete)

From: Bil Herd <*bherd_at_mercury-cg.com*> Date: Wed, 6 Jun 2012 13:09:59 -0400 Message-ID: <98981d88a1d99bb120e9e7e3a819825f@mail.gmail.com> · bherd_at_mercury-cg.com

Yes especially the quick dying ones that only lasted between 1-6 months.
You could see the corrosion creeping across the die under a microscope ,
"purple creeping crud"  we called it.   There was a point probably late 84
early 85 where the passivation problem was fixed.

-----Original Message-----
From: owner-cbm-hackers@musoftware.de
[mailto:owner-cbm-hackers@musoftware.de] On Behalf Of Gerrit Heitsch
Sent: Wednesday, June 06, 2012 11:48 AM
To: cbm-hackers@musoftware.de
Subject: Re: Commodore PLA equations (complete)

On 06/06/2012 06:12 AM, Bil Herd wrote:
> Layer 7 was the passivation which we sucked at for quite a while.

Would that explain why the PLA and some other chips made by MOS tended to
die after a while?

  Gerrit

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