[Coco] assembly questions?

[mmarlett at isd.net]

David,

We have no internal Xray, all done at the vendor. The thing you have to
watch out for is that when the boards are assembled they are clean, parts
are clean. Thus you have contact, poor, but contact. So you functionally
test and the board passes. As oxidation occurs you now start to have
problems in the field, the worst kind to have, $$$$$$. 

We are all new to this and haven't had alot of rework on the BGA side. Our
rework station will do just about anything. Get the correct nozzle and you
are set.

Mark
Cloud-9

>Ya, we've been looking at getting it for my work to repair our new
>boards which would be BGA.
>
>The actual board stuffing takes place at our board house vendor.  As far
>as X-Ray analysis, we're just planning on doing a functional burn-in
>test to make sure they work instead.
>
>You probably have to go thru all that for mil-spec stuff which can add
>greatly to the cost of the board over just getting the board stuffed.
>
>
>Dave
>
>-----Original Message-----
>From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com]
>On Behalf Of mmarlett at isd.net
>Sent: Monday, July 26, 2004 3:16 PM
>To: coco at maltedmedia.com
>Subject: RE: [Coco] assembly questions?
>
>Dave,
>
>$12k, that is a bargin. Ours is $85K. Not Cloud-9's either, this is a
>hobby
>for me. That would be my REAL job's machine.
>
>Regards,
>
>Mark
>Cloud-9
>
>>BGAs really need to be set on a board by machine.
>>
>>Normally both sides of the board are heated for a predetermined time
>>and/or temperature when the chip is set.
>>
>>You can see what a small BGA rework station looks like at
>>coopertools.com
>>
>>The Weller one is real nice for small scale stuff, and it's a bargain
>at
>>12 grand!  ;)
>>
>>
>>Dave
>>
>>-----Original Message-----
>>From: coco-bounces at maltedmedia.com
>[mailto:coco-bounces at maltedmedia.com]
>>On Behalf Of Kevin Diggs
>>Sent: Monday, July 26, 2004 2:28 PM
>>To: CoCoList for Color Computer Enthusiasts
>>Subject: Re: [Coco] assembly questions?
>>
>>Hi,
>>
>>	Regarding previous discussions on this thread, Is there
>>no way to use these new packages (BGA) with some kind of
>>adapter on older circuit boards that hobbyists can make?
>>
>>					kevin
>>
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>>
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