collecting silicon wafers

From: Dwight K. Elvey <dwightk.elvey_at_amd.com>
Date: Tue Mar 11 20:47:00 2003

Hi
 Not necessarily. If these have been passivated, your
finger prints can be cleaned off. If not, the sodium
will have destroyed the functioning of the transistors.
Dwight


>From: "Chandra Bajpai" <cbajpai_at_attbi.com>
>
>Before anyone goes in trying to cash in their wafers...I assume any
>wafer that was not kept in a clean room environment is worthless. The
>couple of wafers I have finger prints so they definitely are worthless!
>
>-Chandra
>
>
>-----Original Message-----
>From: cctalk-admin_at_classiccmp.org [mailto:cctalk-admin_at_classiccmp.org]
>On Behalf Of Dwight K. Elvey
>Sent: Tuesday, March 11, 2003 5:24 PM
>To: cctalk_at_classiccmp.org
>Subject: RE: collecting silicon wafers
>
>>From: "Vintage Computer Festival" <vcf_at_siconic.com>
>>
>>On Tue, 11 Mar 2003, Dave Wilson wrote:
>>> My only anxiety is that the general interest in collecting
>>> silicon may take off in a big way before I have managed to build
>>> up a workable stock.
>>
>>Indeed. Just try to keep a "Silicon Wafers" category from being
>created
>>on eBay for as long as possible and you'll be in the clear for a while
>:)
>>
>
>Hi
> Even wafer collecting can have monetary value. A while back, at
>the beginning of the last Middle East action, there was a military
>requirement for mil spec TTL parts. I don't recall which but
>I believe it was 74139's that were in short supply. Anyone
>with a wafer of these could just about name their price.
> The fact is that most companies consider the wafers as
>proprietary information. They would rather destroy it or send
>it back to the foundry to be recycled. Wafers that do make
>it to the outside world are usually from some company that
>has shut down and had a warehouse of overstocks.
>Dwight
Received on Tue Mar 11 2003 - 20:47:00 GMT