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Re: BGA soldering

> In a message dated 11/01/2005 08:20:56 GMT Standard Time,
> owner-AMSAT-BB-digest@amsat.org writes:
> However  in space a socket is not going to be any use.
> If anyone has had any  experience of small scale prototyping BGA's onto
> PCBs without resorting to  third party commercial operations, I'd be
> glad of any tips.
> I'm fine  hand soldering the 0.4 and 0.5mm QFP's, but I'm not sure how
> to go about  dealing with BGA packages.

Searching for: BGA toaster reflow    will turn up a number of hits on
Google.  The other problem is alignment, most places use X-ray systems to
verify part alignment and solder quality.  If you're building it for a
space application, you probably want this done anyway.

> Hi Howard.
> The 1mm pitch is very close to the 25 thou pitch used on the DDS  chips.
> It's not a problem to solder these provided you have some solder wick to
>   remove the bridges which will occur when you hand solder.

You can't hand solder what you can't see/reach.  BGA packages use little
solder balls underneath the IC package (didn't we spend years trying to
get rid of that problem?) to attach to the PCB.

73 Mike W4LNA
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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