Hi Gaby! The Xray equipment vendors have told me that Xray tubes that are
less than 100kV have a very low probability of damaging components. Note
the "very low probability" statement - they have not seen any customer
issues with xray damage but they also can't totally rule out the
possibility of damage. We have been using xray equipment with a 52kV tube
and we have yet to have a xray damage issue. I imagine as industry use of
xray inspection of area array increases we will find out how "probable"
xray damage issue will be. And to add one more voice to the discussion - we
have found the using a medium cost xray system (e.g. $30K-$60K) is a
valuable asset in area array component solder process control. The use of
xray equipment doesn't answer every question but having the tool available
is important in several aspects.
Dave Hillman
Rockwell Collins
[log in to unmask]
Gabriela Bogdan <[log in to unmask]>@IPC.ORG> on 05/31/2000 11:31:58
PM
Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
to Gabriela Bogdan <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
To: [log in to unmask]
cc:
Subject: Re: [TN] To X-ray or Not to X-ray.
Hey, Paul!
Now you got me scared. I hoped that Hals und Beinbruch was for good chance.
You write
about multiple passes, -in short, the process is time related. Do I have to
fear that
if the test takes a long time, I might damage good parts?
Thanks,
Gaby
Paul Klasek wrote:
> Take it from you Werner, glad you pull from golf to see us;
>
> 3D machine's orbiting view can see cracks from substrate,
> with the kind human or inhuman experience you and Jerry noted;
> with metal tops it could be still a hazy vision at the best ?
> The likelihood of high efficiency top sinks (metal)
> increasing popularity seems logical, to me (deluded or not),
> meaning to be very interesting for multilayered patients diagnosis?
>
> Did you come across damage factors on X pass repetitions ?,
> i know in med you can burn the bone with multipasses,
> (know cases with 4-6 pass wrist X burns);
> with the intensities required through the metal tops,
> if they are Xable,
> (wonder what's Altera's view on X,seen somebuddy here on Net,please,)
> would there be a possibility of internal damage of ever finer paths ?
>
> I realize this is commercially sensitive laundry,
> hints are good enough answers
> (even no comment, come to think of it)
>
> paul
>
> -----Original Message-----
> From: [log in to unmask] [mailto:[log in to unmask]]
> Sent: Thursday, 1 June 2000 10:17
> To: [log in to unmask]; [log in to unmask]
> Subject: Re: [TN] To X-ray or Not to X-ray.
>
> Hi Paul, Steve & others,
> It all depends on your volume and the level of assurance you need/want.
> There
> is no question that for some people's operation spending that kind of
money
> is overkill, on the other hand there is no question that X-ray inspection
> with the proper recognition algorithm(s) and settings can improve the
> quality
> of the outgoing solder joints better than any other technique.
> Werner Engelmaier
>
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