I agree. It is very very difficult. However, I have been able to detect some using Dage X-ray with a sub-micron detection capability. But it is not easy.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Igoshev, Vladimir
Sent: Saturday, February 16, 2008 7:44 AM
To: [log in to unmask]
Subject: Re: [TN] X-Ray equipment
No, the technology is not here yet. X-ray CAN NOT detect almost hair-like cracks in solder joints and that is the type of cracks we usually see in case of joints broken in brittle mode.
I had an interesting discussion with one of the leading Dage guys when he was presenting over here their X-ray machine and its capabilities.
As almost any of the vendors he mentioned that the machine can detect cracked solder joints and even showed a sample, which made me unhealthy nervous :-).
When we start talking about the image and what the sample was he said that it had been obtained from a specially prepared sample, namely a BGA with ceramic balls overplated with a thin layer of solder. He honestly admitted that it wouldn't be possible to see a crack in a regular (solder made) joint.
Vladimir
----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Sat Feb 16 02:23:08 2008
Subject: Re: [TN] X-Ray equipment
We have both Feinfocus in the lab and Agilent 5DX in the production line.
They are very good and helpful almost all applications, but I never succeeded to see by x-ray the defect we can see in Steve's site http://stevezeva.homestead.com/files/LP_BGA_Crack.jpg
This is very frustrating and performing the cross section always showed the defect as being too narrow in order to be detected by x-ray.
If you want to include such a defect in your requirements, I am very curious to see answers . Maybe the technology evolved since we bought the equipment.
If not, I agree with all the reccomendations .
Gaby
----- Original Message -----
From: "Ioan Tempea" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, February 15, 2008 5:46 PM
Subject: Re: [TN] X-Ray equipment
Thanks Dave!
You wouldn't believe how tight our get informed-compare-buy schedule is. To give you a hint: it can't wait until April :-)
Thanks for your feedback,
Ioan
________________________________
De : [log in to unmask] [mailto:[log in to unmask]]
Envoyé : 15 février 2008 09:31
À : TechNet E-Mail Forum; Ioan Tempea
Cc : [log in to unmask]
Objet : Re: [TN] X-Ray equipment
Hi Ioan! There is quite a bit of excellent X-ray equipment available on the
market and a trip to IPC APEX would be one good way to evaluate multiple
equipment vendors at one time! You need to decide just what capabilities you
want in an X-ray system because the more capability, the greater the cost.
We use Glenbrook Jewel Box 90 systems in our manufacturing facilities -
good, rugged systems with good overall capability for voids, shorts, etc.
and we use Fein Focus in our Failure Analysis laboratory - very high tech
system for the necessities of failure analysis investigations. My
recommendation is pull together a list of "must have" and "would like to
have" system capabilities, match that to you budget and use the APEX
opportunity to conduct your evaluations of the various X-ray system
suppliers. Good luck.
Dave Hillman
Rockwell Collins
[log in to unmask]
Ioan Tempea <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
02/15/2008 07:53 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Ioan Tempea <[log in to unmask]>
To
[log in to unmask]
cc
Subject
[TN] X-Ray equipment
Dear Technos,
One more topic: what are your experiences with X-Ray equipment? Which
brand/model would you recommend or not advise?
We are a typical EMS and would like to inspect as accurately as possible
BGAs and leadless. So voids and hole-fill measuring capability is
desired. If possible, we would like to be able to localize an open BGA
joint.
Not exactly looking for big budget laminography machines like the 5DX,
but it should at least be 2D plus rotation capability. Or a regular, not
so loaded 3D system...
On-line and off-line answers welcome.
Thanks,
Ioan
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