That's a lot of solder pooling!!
Victor,
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Wednesday, October 02, 2013 12:36 PM
To: [log in to unmask]
Subject: Re: [TN] HASL question
Hi Gerry,
Problem is I don't have any more in stock, we only had three panels and a solder sample panel... :o(
But I did take a photo of the side of the solder sample panel that I didn't print paste on, and angled it so that you can kind of see the topography of the pads:
http://stevezeva.homestead.com/SolderSamplePrimary.jpg
It does look like the HASL is really thin. They also look just like a picture that Günter Grossmann sent me (thank-you Günter!) from a case that had the same problem as I have.
Steve
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gerry Gagnon
Sent: Wednesday, October 2, 2013 6:20 AM
To: [log in to unmask]
Subject: Re: [TN] HASL question
Hi Steve!
I would recommend you select a bare board from the stock that produced the assembly photos and take a picture of both sides. When taking the picture, if the pads exhibit a topography, try to take the pic at an angle that shows the topography. If the pads do not show a topography make sure the pics you select show that too.
With these pictures, I think we can all nail this one from the bare board side because the assembly pics tend to add some confusion.
Brs,
Gerry Gagnon
> Date: Tue, 1 Oct 2013 17:14:03 -0600
> From: [log in to unmask]
> Subject: Re: [TN] HASL question
> To: [log in to unmask]
>
> Okay here's another picture. I printed a solder sample and sent it
> through the oven and this is what it looked like:
>
> http://stevezeva.homestead.com/SolderSample.jpg
>
> You can see all the non-wetting going on. The board was profiled and
> it was fine. We are using a FCT Assembly WS889 SN100C solder paste.
>
> What is even more strange is that the first side of the board looked
> okay, but the second side looks like in the photos, like the problem
> is confined to one side of the board if that's possible.
>
> The solder sample was only reflowed once, but I printed the paste on
> the side that was to be built last. Weird huh?
>
> I know you can't tell anything for sure just from some photos, but
> it's the strangest thing I've seen in a while...
>
> Steve
>
> -----Original Message-----
> From: Steve Gregory
> Sent: Tuesday, October 1, 2013 4:46 PM
> To: [log in to unmask]; Steve Gregory
> Subject: RE: [TN] HASL question
>
> Here's one picture:
>
> http://stevezeva.homestead.com/NonWetting.jpg
>
> Look at the left pad and the tarnish that you see there, does that
> look like tarnished nickel?
>
> This is after the board was washed. I have places all over the board
> that looks like this.
>
> I'll post a picture of what it looks like after I printed a solder
> sample with paste and sent it through the reflow over
>
> Steve
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
> Sent: Tuesday, October 1, 2013 4:16 PM
> To: [log in to unmask]
> Subject: Re: [TN] HASL question
>
> Ahhhh....it's what I figured. I think that's what happened. I'll have
> pictures later.
>
> Steve
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Wayne Thayer
> Sent: Tuesday, October 1, 2013 4:15 PM
> To: [log in to unmask]
> Subject: Re: [TN] HASL question
>
> No. Not unless somebody screwed up.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
> Sent: Tuesday, October 01, 2013 6:11 PM
> To: [log in to unmask]
> Subject: Re: [TN] HASL question
>
> Hi all,
>
> It's funny that the HASL topic has come up today, because we just ran
> a board today that supposedly was lead-free HASL finished, and man it
> looks like crap!
>
> Question; does a PCB get nickel before it gets Lead-free HASL'ed?
>
> Steve
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Vladimir Igoshev.
> PhD
> Sent: Tuesday, October 1, 2013 2:23 PM
> To: [log in to unmask]
> Subject: Re: [TN] HASL question
>
> Hello Victor,
>
> It wouldn't solder in a first place.
>
> --
> Best regards,
>
> Vladimir Igoshev. PhD
> mailto:[log in to unmask]
>
> SENTEC Testing Laboratory Inc.
> 11 Canadian Road, Unit 7.
> Scarborough, ON M1R 5G1
> Tel: (416) 899-1882
> Fax: (905) 882-8812
> www.sentec.ca
>
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