Thanks, John and Mike,
pot issue, sounds reasonable to me. I can't find a better guess, so I'll 
give them a hot pot shot.
Thanks again, never been disappointed with TN, just couple of hours from 
question to answer.
/Inge


----- Original Message ----- 
From: "John Burke" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, June 24, 2009 4:59 PM
Subject: Re: [TN] SN100C I don't like the look of board pads


> Ugh,
>
> Last time I saw something like that was on a wave solder machine where the
> solder pump impeller was breaking up which lead to a very "rough" looking
> joint with traces of iron.
>
> John Burke
> (408) 515 4992
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
> Sent: Wednesday, June 24, 2009 6:41 AM
> To: [log in to unmask]
> Subject: Re: [TN] SN100C I don't like the look of board pads
>
> Morning Inge and Everybody!
>
> Got your pics posted Inge, and as usual, your pictures always give me a
> new window in which to see things. Here they are:
>
> http://stevezeva.homestead.com/files/SN100CSEM1.jpg
>
> http://stevezeva.homestead.com/files/SN100CSEM2.jpg
>
> I renamed your files and saved them as *.jpg files because my web page
> doesn't allow me to use *.tif files. We've only used SN100 here a few
> times, and you're right, ours looked just like regular 63/37 HASL. We've
> never had a SEM done on the boards we used, so I have nothing to compare
> your images to. But the boards we used were nice and shiny.
>
> Steve
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Hernefjord Ingemar
> Sent: Wednesday, June 24, 2009 7:55 AM
> To: [log in to unmask]
> Subject: [TN] SN100C I don't like the look of board pads
>
> Hi all,
>
> will send pictures to Steve.
> The two SEM images show SN100C boards that we got recently.
> I don't like the look of the solder surface. Very grainy and with lots
> of copper (darker spots). EDAX gives even fragments of iron. My first
> thought was that the manufacturer had contaminated baths, which will be
> denied, of course. Anyway, my opinion is, that SN100C should be more
> like ordinary tin/lead, i.e nearly zero copper and a more shiny
> approach.
>
> /Inge
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