0.035" apertures should present no problem at all to an LPI process
which is even half in control. What you describe sounds like bleed
from a UV ink.
Are you sure your vendor is providing you an LPISM?
If you need UV soldermask, we can provide you with a no bleed UV also.
Regards
Chris Wall
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Subject: Re: DES: Pads
Author: INTERNET:[log in to unmask] at CSERVE