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To: nihil who wrote (66167)10/9/1998 10:56:00 PM
From: Elmer  Respond to of 186894
 
Re: "I was told that Intel did not serial number chips, so that it was impossible to identify the wafer or batch or fab date once it left the test stand or was sliced up. "

Intel has the ability to identify some of it's products down to the wafer and x/y coordinates.

EP



To: nihil who wrote (66167)10/12/1998 12:36:00 PM
From: Tony Viola  Respond to of 186894
 
Nihil, Re: "Do you know if IBM does serialize, as you suggest in the early part of your post
(as a source of post-test failure data)?"

Since IBM still uses most of their own fab'd chips, and many of them go into their mission critical enterprise computers, I'm guessing they do keep date and lot codes, minimum. That way, if a field problem shows up that is traceable to chips, they could do a recall, if necessary, based on those dates and lots. I haven't heard of any, though. I don't know what Intel does.

Tony