Hi Dave,

To have s shiny joint, I mean very shiny joint is the customer's
requirement. I understand that gold will influence the surface texture, but
not the customers.

They follow strictly the very old thinking that appearance define
reliability and good solder joint.

Anyway, I am still cracking my head on resolving this issue.

Thanks.

Poh





At 08:21 AM 2/27/03 -0600, Dave Hillman 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
>
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