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October 2015

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Subject:
From:
Tan Geok Ang <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Tan Geok Ang <[log in to unmask]>
Date:
Fri, 9 Oct 2015 04:40:54 +0000
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I do encountered similar issue and yes, latex without ammonia will not cause this issue.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Vladimir Igoshev
Sent: Thursday, 8 October 2015 11:40 PM
To: [log in to unmask]
Subject: Re: [TN] ENIG VS. ammonia

‎I'm not a huge fan of interpreting data based on optical image, but we saw something similar. The root cause had nothing to do with BP though.

We'd need the board to analyze and figure out what the root cause is.

Regards,


Vladimir

Sent from my BlackBerry 10 smartphone.
  Original Message
From: Steve Gregory
Sent: Thursday, October 8, 2015 17:35‎
To: [log in to unmask]
Reply To: TechNet E-Mail Forum
Subject: Re: [TN] ENIG VS. ammonia

Hi Ed,

Here you go:

http://stevezeva.homestead.com/Ed_BP.jpg

Steve

On Thu, Oct 8, 2015 at 9:08 AM, Ed Popielarski <[log in to unmask]>
wrote:

> Hi Steve,
>
>
>
> Could you please post the attached?
>
>
>
> Ed Popielarski
>
> Engineering Manager
>
>
>
> 970 NE 21st Ct.
>
> Oak Harbor, Wa. 98277
>
>
>
> Ph: 360-675-1322
>
> Fx: 206-624-0695
>
> Cl: 949-581-6601
>
>
>
>
>
>
>
> “It's one kind of victory to slay a beast, move a mountain, and cross 
> a chasm, but it's another kind altogether to realize that the beast, 
> the mountain, and the chasm were of your own design.”
>
>
> https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&s
> pn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
>
>
>
> *From:* Steve Gregory [mailto:[log in to unmask]]
> *Sent:* Wednesday, October 07, 2015 2:15 PM
> *To:* TechNet E-Mail Forum; Ed Popielarski
> *Subject:* Re: [TN] ENIG VS. ammonia
>
>
>
> Hi Ed,
>
> I use peelable latex mask quite often here (mostly for conformal coat
> masking) and have never had it tarnish ENIG. I do know that some masks 
> contain some ammonia (some formulations more than others) and the ones 
> that do usually have a note not to use on OSP finishes, but I've not 
> seen such a note for ENIG. IHMO you got something else going on there 
> besides the peelable mask causing the problem...
>
> Steve
>
>
>
> On Wed, Oct 7, 2015 at 2:46 PM, Ed Popielarski 
> <[log in to unmask]>
> wrote:
>
> Hi all,
>
> I Have a batch of boards showing what I believe to be black pad. This 
> is surfacing at thru hole (solderability, some pads are turning 
> orange). One person suggested the peelable solder mask contains 
> ammonia and this is what is causing it. I disagree.
>
> Suggestions or comments?
>
> Ed Popielarski
> Engineering Manager
>
> [cid:[log in to unmask]]
> 970 NE 21st Ct.
> Oak Harbor, Wa. 98277
>
> Ph: 360-675-1322
> Fx: 206-624-0695
> Cl: 949-581-6601
>
>
>
> "It's one kind of victory to slay a beast, move a mountain, and cross 
> a chasm, but it's another kind altogether to realize that the beast, 
> the mountain, and the chasm were of your own design."
>
> https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&s
> pn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
>
>
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