Hi Dave,
In fact, I have the same thought as your Mentor once. But, I am afraid that
their followers will simply follow blindly and adapt the same kind of
thinking.
Monkey see, monkey do.
Poh
At 07:28 AM 2/28/03 -0600, you wrote:
>
>Hi Poh! I had a mentor who told me that sometimes the only way to change a
>basis is to wait for the individual's retirement! It's too bad that your
>customer insists on a visual crutch for quality reliance. Other Technet
>guru's have suggested your only alternative - work with the soldering
>process profile to minimize the solder joint surface texture
>characteristics. Good Luck.
>
>Dave
>
>
>
> pohkh
> <[log in to unmask] To: "TechNet E-Mail
Forum." <[log in to unmask]>, [log in to unmask], Dave
> m.sg> Hillman
<[log in to unmask]>
> cc: [log in to unmask]
> 02/27/2003 04:14 Subject: Re: [TN] :
Shining smooth solder joint on ENIG or Gold plating Board.
> PM
> Please respond to
> pohkh
>
>
>
>
>
>
>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
>>
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