19 Nov
2001
19 Nov
'01
1:52 p.m.
On Mon, 19 Nov 2001, Bob Shannon wrote:
In my experiance, very early chips used a purple
ceramic with a high
thorium content causing the distinctive color. Unfortunatley, this
thorium emits low level particles that cause soft errors, which became
apparent in the early days of DRAM.
This drove a change in ceramic processing and costs, pointing the way
towards todays plastic packages.
Cool. This knowledge is worth a whole lot more to me than $565.
:)
Sellam Ismail Vintage Computer Festival
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