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December 2009

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Subject:
From:
"Terry L. Munson" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Thu, 10 Dec 2009 17:23:17 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (148 lines)
We have recovered a large number of bare boards and components with  
EnviroGold 816 saponifier at 10% in an Aquastorm 200 or using plasma oven with  
CF4 and Oxygen to remove thick oxides.  If these are of interest please  
contact me off-line.
 
Terry Munson
Foresite 
765-457-8095
 
 
In a message dated 12/10/2009 3:18:47 P.M. Eastern Standard Time,  
[log in to unmask] writes:

Vic,

The boards are HASL-SnPb. I am expecting the worse, that  they were
stored in an uncontrolled environment.

Lee Whiteman,  PMP
Senior Member Engineering Staff
L-3 Communications  East
Telephone: (856) 338-3508
FAX: (856) 338-2906
E-Mail:  [log in to unmask]


-----Original Message-----
From:  TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent:  Thursday, December 10, 2009 3:07 PM
To: [log in to unmask]
Subject: Re:  [TN] BOARD SOLDERABILITY

Is the HASL SnPb or LF?
Where the samples  stored in their original package material

Vic,

-----Original  Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev  Christian
Sent: Thursday, December 10, 2009 12:59 PM
To:  [log in to unmask]
Subject: Re: [TN] BOARD SOLDERABILITY

Lee,
Yes,  EDTA, BUT can you be sure you have got it all off of your board,
especially  from the solder mask?
Bev
RIM

-----Original Message-----
From:  TechNet [mailto:[log in to unmask]] On Behalf Of Lee Whiteman
Sent: Thursday,  December 10, 2009 1:54 PM
To: [log in to unmask]
Subject: [TN] BOARD  SOLDERABILITY

One of my colleagues has a HASL finished board, that sat  in our
stockroom for ~ 10 years, and of course he want to use them  (EOY
Billing).

Ran the board through wave soldering, and it did not  solder at all. Good
news was that the board was not damaged by the heat -  it just was not
solderable. I do not want to use a more active flux since  it will be
difficult to clean.

Are there any solutions / processes  that can restore board
solderability?

Thanks in advance.

Lee  Whiteman, PMP
Senior Member Engineering Staff
L-3 Communications  East
Telephone: (856) 338-3508
FAX: (856) 338-2906
E-Mail:  [log in to unmask]



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