It's harder to see mask skips etc. with clear. The board fab I used to work for got demands for every color you can think of: (default) green, red, white, black, blue, clear, pink, "rainbow" (multi-color) - yes we did it, the mask guys hated it. Different colors of LPISM need different UV exposures, some are hard to get right.
I've seen threads in the past on Technet that dealt with the history behind green soldermask - check the archives.
Best Regards,
Timothy Reeves
Technical Service Engineer - Matsushita Electronic Materials, Inc.
4114 Heather Street, Forest Grove, Oregon, 97116
Main (503) 357-8695 Direct (503) 992-5109 Cell (503) 781-1495 Fax (503) 357-8868
-----Original Message-----
From: Genny Gibbard [mailto:[log in to unmask]]
Sent: Monday, April 07, 2003 12:17 PM
Subject: Re: New Topic: Why are most solder mask requirements, for GR
EEN mask???
Our preferred colour is clear. We will accept green only if we are
demanding a really fast turn on some prototype units.
Nobody has yet mentioned the use of clear. Is there something wrong with
this choice? We like the ease that we can see traces through it.
-----Original Message-----
From: Franklin D Asbell [mailto:[log in to unmask]]
Sent: April 7, 2003 12:18 PM
To: [log in to unmask]
Subject: [TN] New Topic: Why are most solder mask requirements, for
GREEN mask???
Just curious...
Franklin
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