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 palce.
--
Best regards,
Vladimir Igoshev. PhD
mailto:[log in to unmask]
SENTEC Testing Laboratory Inc.
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Fax: (905) 882-8812
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