Richard,
We already have an AirVac system, but this is hard to use and does not
work in tight spaces due to the nozzles.
Actually I did mean Focused IR. My understanding is that this is
relatively new in comparison to the air/hot gas systems. Most of our
boards are .062. and smaller than 10 x 10, but we have a couple of
backplanes. The focus is on repairing the smaller boards however. That
is where our volume is.
Thanks for your input.
Leif Erik Laerum
Quality Assurance Manager
Texas Memory Systems
[log in to unmask]
Tel: (713) 266-3200 x468
www.texmemsys.com
Stadem, Richard D. wrote:
> I assume you mean a hot-gas BGA rework station. The answer to your
> question is (drum roll followed by Ka-ching!) it depends.
> It depends on the following:
> 1. What type of boards do you need to rework?
> If you build lots of heavy backplanes, thick multilayer
> assemblies with lots of internal copper planes, very large boards
> (larger than 19" by 19", for example) and you do not need to put flip
> chips or small CSPs on them, then look at a Summit 1100 with at least a
> 1500 watt bottom preheater.
>
> 2. What type of components do you need to rework?
> If you build primarily average or small .062"-.093" thick
> multilayer assemblies and you need to rework standard BGAs and flip
> chips, then the Metcal or OKi systems will work well for you, even if
> these are built with lead free solder.
>
> 3. If you build a wide range of boards, but not a lot of very
> small flip chips or CSPs, then the AirVac DRS24 is the best all-around
> machine. It can handle very small boards and all the way up to about a
> 16" by 16", .125" thick assembly with the double bottomside
> preheater plates. The air flow is very well controlled so it can be used
> for most flip chips and CSPs, but is not quite as good as the Metcal
> or OKi systems for really small parts (.035" square or smaller).
>
> I have used the IR rework stations, and found them to be OK is some
> situations, but not very good in others. The issue is the different
> component materials, even if they are the same color, quite often have
> radically different rates of IR absorption, so you never know if it is
> too hot or not hot enough. And if you cannot get enough convection heat
> under the part, you might as well scrap the board. Also, the surrounding
> board area heat varies all over the place. I have not had very good luck
> with IR.
>
> If you are looking for a machine primarily to do BGA reballing, use
> laser.
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Leif Erik Laerum
> Sent: Tuesday, November 04, 2008 7:44 AM
> To: [log in to unmask]
> Subject: [TN] BGA Workstations
>
> Technetters,
>
> We are shopping for a anew and improved BGA workstation. First of all it
> would be great if I could get some recommendations what you have
> purchased recently and why. In addition, I was hoping someone could give
> us some real world pro's and con's with respect to the focused IR type
> of workstation.
>
> Thank you!
>
> --
> Leif Erik Laerum
> Quality Assurance Manager
> Texas Memory Systems
> [log in to unmask]
> Tel: (713) 266-3200 x468
> www.texmemsys.com
>
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