----- Original Message -----
From: "Phil Nutting" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, February 25, 2005 11:05 AM
Subject: [TN] Planar Transformer construction on circuit boards


> This is for the SMT process people. We
> Good Friday Afternoon,
>
> This is for the SMT process people. We are making a surface mount board
> that includes a planar transformer.  If I take two sections of board and
> have SMT style pads to mount one board to the other will I experience
> reflow problems because the solder pads will be separated (a gap) by two
> thicknesses of LPI mask?
>

Phil,
Maybe I shouldn't answer since I'm not an SMT process person, but I made
similar boards to adapt a thinner SOIC into a wider SOIC space.  I don't
remember if they ever reached the reflow stage (I think they did) but I know
the hand assembled ones worked like a charm.  I would think if your boards
were bonded together and maybe edge plated there would be no problem.
Good luck,
Richard

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