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December 2005

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Subject:
What is this solder mask defect?
From:
Wee Mei <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Wee Mei <[log in to unmask]>
Date:
Mon, 5 Dec 2005 08:58:23 +0800
Content-Type:
text/plain
Parts/Attachments:
text/plain (27 lines) 
Steve,

Hello,

The suspect is completely flat and smooth to touch. An interesting
observation is that though it appear at the same location for all the 10pcs
of board, the size of the image tend to get smaller and smaller if the
boards are arranged starting with the largest image. It can't be soda
strawing as it is not on trace. It can't be pink ring as it is not around
hole. What can it be? What is the likely cause?

Will ask Steve to put it up. Kindly take a look. Your opinion is greatly
appreciated.

Regards,
Wee Mei

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