It is possible. We do it routinely. We use "goop" and pallets depending on
requirement and schedule requirements. Just don't leave out the goop.

Earl Moon
----- Original Message -----
From: Collins, Graham <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, August 27, 1999 9:27 AM
Subject: Re: [TN] continuous assembly flow for double SMT/TH


> Matthew
> It is possible to do both sides SMT using the same carrier, I've seen it
> done on a board in a double sided line (board flipper midway).
> To add selective soldering may be a bit more of a challenge, by definition
> you are looking to shield something from the solder wave that was put on
> earlier (e.g. in SMT).  So you would have to have a clip on addition -
which
> would increase your risk of fixture failure.
>
> I'd go with two fixtures.
>
> have a good weekend!
>
> Graham Collins
> Process Engineer,
> Litton Systems Canada, Atlantic Facility
> (902) 873-2000 ext 6215
>
> -----Original Message-----
> From: Matthew Park [mailto:[log in to unmask]]
> Sent: Friday, August 27, 1999 1:02 PM
> To: [log in to unmask]
> Subject: [TN] continuous assembly flow for double SMT/TH
>
>
> Is it feasible to have one type of board carriers to take boards thru 1)
> glue curing process for first side and 2)invert carriers with boards, and
> 3)reflowing second side, and 4) do manual stuffing of th components and 5)
> take them thru selective wave soldering process?
>
> I am trying to create a continuous assembly process where SMT components
for
> bottom side is cured and for top side is reflowed, and TH components are
> wave soldered selectively by using one type of board carriers without
> operators handling boards.
>
> Is any assembly company doing this, assembling both sides of SMT and doing
> selective wave soldering for TH in a continuous process?
> My thought suggests that this is not possible. And this continuous process
> with one board carrier type only works with SMT and TH components on one
> side.
>
> appreciate your technical inputs
>
>
>
> Matthew S. Park
> Sr. Process Engineer
> Phoenix International Corp.
> 701-277-6434
> [log in to unmask]
>
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