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October 2013

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Subject:
From:
Steve Gregory <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Steve Gregory <[log in to unmask]>
Date:
Tue, 1 Oct 2013 17:23:17 -0600
Content-Type:
text/plain
Parts/Attachments:
text/plain (166 lines)
Hi Bob,

It's supposed to be, but I have my doubts...

Steve 

-----Original Message-----
From: Bob Landman [mailto:[log in to unmask]] 
Sent: Tuesday, October 1, 2013 5:22 PM
To: TechNet E-Mail Forum; Steve Gregory
Subject: Re: [TN] HASL question

Steve, 

It looks like nice shiny nickel...

Is this a lead-free HASL?

Bob

Sent from my iPhone

On Oct 1, 2013, at 7:14 PM, Steve Gregory <[log in to unmask]> wrote:

> 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.
> 11 Canadian Road, Unit 7.
> Scarborough, ON M1R 5G1
> Tel: (416) 899-1882
> Fax: (905) 882-8812
> www.sentec.ca
> 
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