What's the minimum space between FlipChips for letting the eye-foot in between and down enough to see? /Ingemar

-----Original Message-----
From: Stephen R. Gregory [mailto:[log in to unmask]]
Sent: den 2 juni 2000 19:35
To: [log in to unmask]
Subject: Re: [TN] Other visual tests under a BGA possible?


In a message dated 06/02/2000 12:04:54 PM Central Daylight Time,
[log in to unmask] writes:

<< Dear Members!

 With interest I follow your discussion about X-ray testing of BGAs. I would
 like to know, are there any other visual tests possible, to look under a
 soldered BGA? For example, with a very tiny camera using a
 glass-fibre-cable, say 0,5mm diameter? Is something like this in use? Or
 makeable? Would need a very tiny optical system? I got the impression, to
 solder BGAs reliable is a very delicate thing, isn't it?

 Sorry for my stupid statements, but I haven't any experience in BGAs nor
 testing of PCBs.
 Jurgen. >>

Hi Jurgen!

The system is already out there. Go to: http://csitechnet.com/sld001.htm and
you'll find a online presentation about the whole thing. I'm trying to get
management to buy it.

-Steve Gregory-

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