I can sympathize. I had customer ( quality guy ) who had NO experience with circuit boards or soldering prior to our contract. In our case it was through hole and the affected joints were limited to certain pins on certain parts. I actually had to empty my wave solder and fill it with new solder. The advice to keep time over liquidus is about the best I know to do. Nitrogen might help. 

-----Original Message-----
From: pohkh [mailto:[log in to unmask]]
Sent: Thursday, February 27, 2003 4:14 PM
To: [log in to unmask]
Subject: Re: [TN] : Shining smooth solder joint on ENIG or Gold plating
Board.


Hi Dave,

The problem is that I'm having extreme stubborn customer that insists to meet the requirement.

I do not know how they do it, but those sample boards that they have showed me is of smooth shining joint.

I doubt they rework all boards, as each board consists, at least 2000 solder joints.

Poh


--- Dave Hillman <[log in to unmask]> wrote:

> Hi Poh! I just have to ask the question - "Why do you want a shiny
> solder
> joint"? A solder joint's surface texture has very little to do with
> its
> quality and use environment integrity. The JSTD-001 and 610
> committees have
> acknowledged that fact with the elimination of requiring solder
> joints be
> "bright and shiny". Certain metallizations (such as gold) can
> influence the
> solder joint surface texture but have no impact of reliability.
> Reliance on
> a solder joint's appearance as a measure of qualify can be a
> dangerous
> assumption.
>
> Dave Hillman
> Rockwell Collins
> [log in to unmask]
>
>
>
>                       Poh Kong Hui
>                       <[log in to unmask]        To:
> [log in to unmask]
>                       M.SG>                    cc:
>                       Sent by: TechNet         Subject:  [TN] :
> Shining smooth solder joint on ENIG or Gold plating Board.
>                       <[log in to unmask]>
>
>
>                       02/27/2003 06:18
>                       AM
>                       Please respond to
>                       "TechNet E-Mail
>                       Forum."; Please
>                       respond to Poh
>                       Kong Hui
>
>
>
>
>
>
> Hi Technetters,
>
> Can someone advise me how to get a good smooth shining solder joint
> on the
> ENIG board or board with gold plate SMT pads.
>
> As I can understand that board subjected to reflow soldering, the
> solder
> joint tends to look dull and not so smooth joint. But, is there any
> way to
> get a good shining joint.
>
> Thanks.
>
> Poh
>
> ---------------------------------------------------
> Technet Mail List provided as a free service by IPC using LISTSERV
> 1.8e
> To unsubscribe, send a message to [log in to unmask] with following
> text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt or (re-start) delivery of Technet send e-mail
> to
> [log in to unmask]: SET Technet NOMAIL or (MAIL)
> To receive ONE mailing per day of all the posts: send e-mail to
> [log in to unmask]: SET Technet Digest
> Search the archives of previous posts at:
> http://listserv.ipc.org/archives
> Please visit IPC web site http://www.ipc.org/html/forum.htm for
> additional
> information, or contact Keach Sasamori at [log in to unmask] or
> 847-509-9700
> ext.5315
>  -----------------------------------------------------
>
> ---------------------------------------------------
> Technet Mail List provided as a free service by IPC using LISTSERV
> 1.8e
> To unsubscribe, send a message to [log in to unmask] with following
> text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt or (re-start) delivery of Technet send e-mail to
> [log in to unmask]: SET Technet NOMAIL or (MAIL)
> To receive ONE mailing per day of all the posts: send e-mail to
> [log in to unmask]: SET Technet Digest
> Search the archives of previous posts at:
> http://listserv.ipc.org/archives
> Please visit IPC web site http://www.ipc.org/html/forum.htm for
> additional
> information, or contact Keach Sasamori at [log in to unmask] or
> 847-509-9700 ext.5315
> -----------------------------------------------------
>

---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------