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June 2005

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Subject:
From:
"Dehoyos, Ramon" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Dehoyos, Ramon
Date:
Fri, 3 Jun 2005 08:27:01 -0400
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        Dry film is capable of providing greater thickness than LPI. It keeps solder paste from shorting across to other pads. One of probably few advantages.
        Ramon

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of John Parsons
Sent: Thursday, June 02, 2005 7:01 PM
To: [log in to unmask]
Subject: Re: [TN] Dry Film "Soda Strawing"...an update.


Not to hijack Steve's thread but what would be the reasoning for applying
the dryfilm mask over LPI?  What would be the benefits here?  Within our
customer base we never get calls for dryfilm mask so I am not clear on it's
preferred application.  Steve's customers sure seem to like it!  It does
seem somewhat problematic for him though :o) .

John Parsons

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Metcalf
Sent: Thursday, June 02, 2005 3:49 PM
To: [log in to unmask]
Subject: Re: [TN] Dry Film "Soda Strawing"...an update.

Steve,

While it is not an "easy" process, I know a number of companies that have
done the dry over liquid process for several years. Your fab shop needs to
verify the LPI is compatible with the dry film and there are a few tricks to
make it easier. If you contact one of the solder mask services (Solder Mask
Inc, Mask Tek etc) they can do the job for your vendor or perhaps give them
some tips to help them do it themselves.

Regards,
Bob

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