19 Apr
2007
19 Apr
'07
12:53 p.m.
On Thu, 19 Apr 2007 12:00:53 -0400 Warren Kumari <warren@kumari.net> wrote:
There was also an issue where one of the large manufacturers of (binary) CAMs received a batch of polyimide that was contaminated with an alpa-emitter (for some reason thorium oxide springs to mind) and their quality control didn't catch it... As far as I know the problem was identified before any products with the CAMs were shipped, but I had an order held up while the vendor tried to source alternate parts...
Contamination by alpha emitters was a major problem some years ago. Manufacturers had to change their formulations to avoid the problem. --Steve Bellovin, http://www.cs.columbia.edu/~smb