Hi Tony! The impact of xray on electronics is not very straight forward -
the impact is a function of dose (xray strength and exposure time),
equipment parameters, type of component, and physical parameters. One
source of xray damage which many folks don't think about is security
surveillance being done now due to the 9-11 attacks. There are a couple of
good papers which may help you out:

1) Xray Inspection: Easy Does It, Electronic Packaging &Production,
February 2002 Issue, Tom Clifford author

2) Nicolet Instruments, Application Notes, Ionizing Radiation and Its
Effects Upon Electronic Components, (this study contains a good report from
Sandia Labs)

3) Sandia Labs report # SAND82-2151

Good Luck.

Dave Hillman
Rockwell Collins
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                      Alexandra Curtis
                      <AlexandraCurtis@        To:       [log in to unmask]
                      ipc.org>                 cc:
                      Sent by: TechNet         Subject:  [TN] X-ray Processes
                      <[log in to unmask]>


                      08/27/2003 02:57
                      PM
                      Please respond to
                      "TechNet E-Mail
                      Forum."; Please
                      respond to
                      Alexandra Curtis






I am looking for any IPC committee members that might be familiar with the
detrimental effects of certain X-ray processes on programmed devices.
Hamilton Sundstrand has received a GSFC NASA Advisory warning that newly
imposed x-raying and sterilization requirements & equipment may be
detrimental to space flight hardware. We have adopted the following
approach and I am wondering if anyone else has developed a shipping policy
for programmed electronics that deals with this issue.


Thanks
Tony Monteiro
1 Hamilton Road
M/S 1A-1-W64
Hamilton Sundstrand
Space Systems International
Windsor Locks, CT 06096
1-860-654-3317
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