unless, you stamp it while hot - not everybody"s cup of tea.  your  
vendor most likely not going to do it, even you pay them more.
          jk
On Jul 9, 2014, at 1:29 PM, Steve Gregory wrote:

> Hi Ricardo,
>
> I finally have your pictures posted. Sorry it took me so long, I  
> can usually post things much sooner than this, but I was tied-up  
> all day with jury duty yesterday, and when I came into work today  
> it's been hectic.
>
> So here are your photos:
>
> http://stevezeva.homestead.com/HASL1.jpg
>
> http://stevezeva.homestead.com/HASL2.jpg
>
> To me, this looks pretty typical of the HASL that I see, you don't  
> ever get perfectly flat pads with HASL.
>
> Steve
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Ricardo  
> Moncaglieri
> Sent: Tuesday, July 8, 2014 10:16 AM
> To: [log in to unmask]
> Subject: [TN] HASL Plated PCB Matter
>
> Dear Colleagues,
> I´m working in the aerospace industry at INVAP SE - ARGENTINA and  
> my rol is QA Electronic Service Manager.
> Would like to know your comments on following matter:
>
> Have requested to a new PCB provider some HASL plated pcb specimens  
> in order to verify its quality and found out what enclosed pictures  
> show:
> 100% of plated pads have its plating drained or slided off toward  
> the same direction from left to right affecting coplanarity.
> As per our visual inspection at first conclusion we stated that it  
> is an Indicator Process (not necessary dewetting related issue) and  
> could be caused between others, from:
> 1) Pb % degraded.
> 2) Low air flow temperature trend.
> 3) Angle of impact of air flow.
>
> We asked the provider to define cause of this issue. We didnt do a  
> metallographic analisys to verify Cu6Sn5 presence to confirm  
> intermetallic fusion.
>
> We run the J-STD-003 test "C" to verify solderability and it is  
> 100% Ok well wetted, furthermore we soldered a desoldering ribbon  
> (previously tin plated) directly to a pad without using of Flux nor  
> solder and verified that its adherence is very good which indicates  
> pad surface would be well plated.
>
> As per your experience: Do you agree with us on our conclusions  
> specially that it seems to be not a strictly dewetting matter?
>
> Appreciate too much your feedback on such a matter.
>
> Brgds, Ricardo Moncaglieri
>
>
>
>
>
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