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November 2000

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Subject:
From:
Darrel Therriault <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 1 Nov 2000 09:35:22 -0800
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Trevor,

What is it shorting to??  Is it across the R/C or is it shorting to etch?

DT



At 12:08 PM 11/1/00 -0500, you wrote:
>  Has anyone ever seen solder shorts under an smt resistor that has been
>glued on a board and then wave soldered?
>  The boards go through the standard surface mount process of screen printing
>the glue, placement of components and curing the glue. Then the boards
>receive solder reflow for the top side of the board, on to hand assembly and
>then wave solder. During all in process inspection even after wave solder,
>the boards look good. When the boards get to test it is a different story.
>Randomly across the bottom side of the board, the side that was wave
>soldered, we will get short conditions on various caps and resistors. If you
>look at the component nothing appears to be wrong, but when the component is
>removed you can see solder on the under side of the component and on the
>pcb.
>  This problem has just cropped up, so I find it a complete mystery.
>
>Thanks in advance.
>
>
>Trevor Goddard,
>SMT Supervisor
>XLTEK
>(905) 829-5300 x 348
>[log in to unmask] <mailto:[log in to unmask]>
>
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