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April 2004

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Subject:
Re: Effects of WEEE and RoHS on EMI, etc
From:
Brian Ellis <[log in to unmask]>
Reply To:
(Leadfree Electronics Assembly Forum)
Date:
Thu, 8 Apr 2004 09:20:35 +0300
Content-Type:
text/plain
Parts/Attachments:
text/plain (39 lines) 
If your product is in the GHz part of the spectrum with critical Zo
characteristics, I would recommend a functionality check. Changes in the
flux residue and, above all, the dielectric constant of the substrate
with Br-free may alter the characteristic impedance. This may require
small retouches in the PCB design. This is not a requalification, which
should not be necessary.

Brian

Alexis Meehan wrote:
> Does anyone have data on how EMI/EMC is affected by the lead-free/bromine-free
> implementation on PCB's? Our compliance guys are planning to requalify all our
> PCB's that get converted to lead-free, but we're wondering if this is really
> necessary. Any feedback would be welcome. Thanks.
>
> ~~~~~~~~~~~~~~~~~~~~~~
> Alexis Meehan
> PCB Design Manager
> NOKIA
> ~~~~~~~~~~~~~~~~~~~~~~
>
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