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February 1998

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Subject:
Re: Depression mark during soldermask exposing
From:
"John Haman Jr." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 23 Feb 1998 08:38:25 PST
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A depression mark at expose? Are you sure this is not from the
developer?  What do the marks look like.

John Haman Jr.
American Board Companies
Process / Product Engineer

----------
>
>      Fellow Technetters,
>
>
>      Does any one ever came across depression mark on Printed Circuit
Board
>      during Solder mask Exposing?How does this marks eppears and how to
>      overcome this problem?
>
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