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August 2011

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Subject:
Re: Steps to take to prevent ENIG issues
From:
vladimir Igoshev <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Wed, 3 Aug 2011 17:44:11 +0000
Content-Type:
text/plain
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Absolutely right. I just wish that all board shops has the same philosophy.
Vladimir

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

-----Original Message-----
From: Scott Westheimer <[log in to unmask]>
Sender: TechNet <[log in to unmask]>
Date: Wed, 3 Aug 2011 13:26:35 
To: <[log in to unmask]>
Reply-To: TechNet E-Mail Forum <[log in to unmask]>,
        Scott Westheimer <[log in to unmask]>
Subject: Re: [TN] Steps to take to prevent ENIG issues

I would not be so fast to through out the baby with the bath water. Yes there are other alternatives but a shop that controls their process, i.e. turn over's, chemistry concentrations, times, temperatures and such, should be able to provide a good surface finish. ENIG has been around a long time and yes there can be problems with soldering, peeling and solder mask lifting but 9 times of of 10 it is the fabricators lack of control.

Scott B. Westheimer
Account Manager, Rayben PCB
5709 Clarks Fork Drive
Raleigh, NC 27616
[log in to unmask]
Office: +1(919)278-7539
Home: +1 (919)713-0748
Cell NC: +1 (919)800-1876


 



 > Date: Wed, 3 Aug 2011 16:49:34 +0100
> From: [log in to unmask]
> Subject: Re: [TN] Steps to take to prevent ENIG issues
> To: [log in to unmask]
> 
> Agree, don't use ENIG.
> I am in the middle of a protracted ENIG problem which according to the
> manufacturer is down to our processes and their tests of the board show
> them to be perfect.
> However in order to solder 4 power pad QFPs we are having to scrape off
> the gold to get the nickel to solder.
> Our production and a test at NPL shows the ENIG to be very poor.
> ENIG is the pits.
> 
> Regards
> Rex
> 
> 
> 
>  
> 
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Wenger, George M.
> Sent: 03 August 2011 16:43
> To: [log in to unmask]
> Subject: Re: [TN] Steps to take to prevent ENIG issues
> 
> The only guarantee is not to use ENIG.  To minimize ENIG issues select a
> good PCB fabricator and make sure they control their process.
> 
> Regards,
> George
> George M. Wenger
> Senior Principal Reliability / FMA Engineer Andrew Corporation -
> Wireless Network Solutions 40 Technology Drive, Warren, NJ 07059
> (908) 546-4531 Office (732) 309-8964 Mobile
> E-mail: [log in to unmask]
> 
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
> Sent: Wednesday, August 03, 2011 11:17 AM
> To: [log in to unmask]
> Subject: [TN] Steps to take to prevent ENIG issues
> 
> I have a client who is switching PWB fabricators for ENIG finishes. They
> are fully aware of ENIG issues such as Black Pad, Brittle Nickel, etc.,
> and want to know whatever steps can be taken to prevent ENIG PWBs from
> reaching production with these issues.
> Does anyone have any suggestions?
> 
> 
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