Bill: SR1000 is designed to be applied by screening. It is not photo
definable, thus the screen itself defines the features which limits it's
registration accuracy to about 8mils per side.
It is a true 100% epoxy thermal cure soldermask and does not have any
acrylate chemistry. Whoever is requiring it may feel it has better cured
properties, electrical, chemical resistance, etc, than a LPI mask. However
most newer generation LPI's have properties comparable to it. My guess is
that this is an older board and the user doesn't want to qualify a new mask,
so they are still calling out the SR1000.
Regards
Michael Barmuta
Staff Engineer
Fluke Corp.
Everett WA
425-446-6076
-----Original Message-----
From: Brooks,Bill [mailto:[log in to unmask]]
Sent: Wednesday, June 25, 2003 8:54 AM
To: [log in to unmask]
Subject: Re: [TN] Hysol SR1000, SR1001 - why?
Thanks Steve.
Most of the boards I see use LPI. Mainly, I think because of the accuracy
with which it can be applied. Is Hysol SR1000 a Silkscreen only material?
Bill Brooks
-----Original Message-----
From: Steve Gregory [mailto:[log in to unmask]]
Sent: Wednesday, June 25, 2003 8:48 AM
To: [log in to unmask]
Subject: Re: [TN] Hysol SR1000, SR1001 - why?
Hi Bill!
SR1000 is just a real tough mask. It's got a matte finish so silkscreen and
conformal coating adhere well...
I've got the datasheet here on my 'pooter, I'll send it to you off-line.
-Steve Gregory-
Can anyone tell me what PCB design parameters would drive the use of Hysol
SR1000 or SR1001 for use as solder mask on a PCB? Why would it be specified
for a specific design over other solder masks? Is there some special reason
for specifying it? Does it have some special property that would make it
preferable to LPI? I can't seem to locate a data sheet on it to evaluate
its properties.
Bill Brooks
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