| | Hello All, | | I am setting up a line to mount CSP/uBGA devices and now am looking at the X-Ray process. It is my opinion that this should be done offline - can you tell me if Im right or do I need to put one inline? | | Also anyone who is mounting CSP/uBGA devices, can you suggest good X-Ray equipment. What do you use? Does it do a good job? | | Any advice appreciated. | | Steve | Steve,
You don't need in line x-ray. Use the process to verify acceptable quality during prototyping. Then, use it on a random sample basis.
I'm using an 8000 pound HP x-ray that does a farily good job. Me and everyone else at HP, would rather use something like a Nicolet. The laminography is great but the machine is NT based but runs the graphics in DOS, if you can believe that.
The stuff being advertised on this forum might be worth a shot. I know nothing about them.
Best resolution and views still are obtained using very high resolution black and white systems. Laminography and speed are not their strong suits.
In all cases, I would x-ray to confirm first there is no shorting. Then, I would look at insufficient solder, voids, etc. Then, you can correlate luck with skill (bounce findings back to profiles, paste, design rules, other).
Earl Moon
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