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Date: Sun, 15 Dec 2002 19:19:41 +0100
From: Rene Tschaggelar
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Subject: Re: place to assemble prototype BGA PCBs?
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Steve T Shannon wrote:
> Rene Tschaggelar wrote in message news:<3DFBA989.firstname.lastname@example.org>...
>>Steve T Shannon wrote:
>>>Hello! It looks like an ic we need for our latest project is only
>>>available in BGA form -- which I don't really want to solder by hand.
>>>Can anyone recommend a service (in the US) that might let me mail them
>>>the boards and the parts, and then send me the boards back with BGA
>>>devices assembled? Any suggestions on prices either?
>>>I'm curious how most people have solved the BGA prototyping problem...
>>BGA cannot be mounted manually. The only choice is vapor phase.
>>Basically a pot with some liquid that evaporates/condenses
>>at around 220Deg C. The temperature profile is made by controlled
>>lowering the pcb int the pot and controlled lifting out of it.
>>It is standard in many pcb fab houses.
> I figured the process was difficult to do manually -- i've seen things
> suggesting the use of solder paste + toaster oven, etc. I saw an old
> usenet post where someone mentioned a service in the UK that you could
> send your board + parts to, and they'd send you back everything stuck
> together. I can't be the only person in need of such a service...
The problem with bakeing is that you have no control over the
temperature. Set it to 250Deg, fine. Open the door - the temp is gone.
Upon closing the door, how do you control the temperatures being
reached how long ?
Yes, I'd send the board and the BGA to a boardhouse too.
They do that.
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