In a message dated 4/19/99 2:36:52 AM Pacific Daylight Time, [log in to unmask]
writes:
> Colleagues,
>
> We have to find a way to replace solder balls on small quantities of BGA
> devices, and I wonder what is available on the market. There might be just
> one unit or up to perhaps fifty units per lot.
>
> The BGAs are of various sizes, and pitches, and ball sizes.
>
> Is there a machine which can do this job for us? Can you suggest
> manufacturers names, and give a guess at the price range.
>
> Are there subcontractors who offer a ball replacement service - and fast
> turnaround? Again I would be grateful for any pointers from those of you
> who
> have experience of this work.
>
> TIA....
>
> Tomaso
>
Morning Tomaso,
Go to: http://www.solderquik.com they make solder preforms for reballing
BGA's, and have just about every ball pattern there is...if they don't have
it, they'll make it!
Their preforms make reballing BGA's a peice o' cake...couldn't be easier!
Clean the bottom of the BGA up, put a little paste flux on, set the preform
in a little jig they supply, place the BGA on top of it, and run the whole
deal thru your reflow oven. Then let it cool, set the BGA in some DI water,
peel the special paper off that held the balls in place in the pattern, and
clean the BGA good, and you're done!
The preforms run anywhere from $1.50 to $3-4 depending on the number of
balls. These really work and make it so simple.
-Steve Gregory-
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