Re: W1 Circuit Board

Posted by Alan Bloom on Jul 26, 2009; 4:01pm
URL: http://elecraft.85.s1.nabble.com/W1-Circuit-Board-tp3327158p3329466.html

The K3 needs the gold flash coating so that the pushbuttons work
reliably.  That's probably why it uses ENIG.

Al N1AL


On Sun, 2009-07-26 at 02:00 -0700, Brett Howard wrote:

> I thought the RoHS compliant stuff that Elecraft is doing was all in the
> ENIG process.  I've ordered a K1 and a K3 since RoHS and all the boards
> are ENIG.  Perhaps for the W1 they are using IMAg?  
>
> I should explain:
> ENIG = Electroless Nickel Immersion Gold (or gold pads)
> or
> IMAg = Immersion Silver (or silver (whiteish) pads)
>
> For the record both have their pluses and minuses such as the IMAg is
> more susceptibile to oxidization and other cleaning issues (cleaning
> when the boards are made) where as ENIG is usually less often plagued by
> cleaning issues however contamination in the process can lead to whats
> referred to as black pads.  ENIG costs a little more and is generally
> accepted as slightly "better".  Probably mostly because of the higher
> cost. ;)
>
> ~BTH
>
> On Sat, 2009-07-25 at 19:52 -0400, Don Wilhelm wrote:
> > David,
> >
> > I believe that is one version of the RoHS compliant solder pads.
> >
> > 73,
> > Don W3FPR
> >
> > David Heinsohn wrote:
> > >   I just started working on the W1.  So I just really looked at the
> > > circuit board.  I noticed that the pads seem to be white rather than
> > > silver or gold.  So all you bright folks can tell me what's different
> > > and why.  I assume that this is a new and better way to produce a
> > > board.  It certanly takes solder OK.
> > >
> > > TNX
> > > de
> > > KD0R
> > > David
> > >  
> > >
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