It's been many years since I have dealt with Sealbrite. When I did see
Sealbrite in use, it was on single sided and some simple double sided
boards, what we used to refer to as "punch and crunch". This was the
solvent based system. It was a messy process, but effective and VERY LOW
cost. The principle was the rosin was activated by heat and aided the
soldering process. As I recall this process was not compatible with
aqueous (organic acid) flux. The last time I saw it in use, no clean
fluxes hadn't even been introduced to the market. Without knowing what
other components are contained in the current Sealbrite, it would be
difficult to predict what the effect would be on long term reliability.
I would bet the current version of Sealbrite is an aqueous system if it is
still in use today. I contacted a friend at Enthone and he didn't have any
info on this product. I'm not sure who is selling it now.
Regards,
Bob Metcalf
Atotech Western Regional Manager
Cell 714-334-7667
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Charming Chan <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
01/26/2010 06:48 AM
Please respond to
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Re: [TN] Someone knows SEAL BRITE COATING?
Hello Bob,
Some of low-end pcb fab shops still apply seal brite coating on
single-side power pcb board. Is it a bit cost effective than new
generation OSP?
What's the long-term reliability and ionic cleanness of seal brite coating
compared with new generation OSP? Thank you.
Best Regards
Charming Chan
-----Original Message-----
From: Bob METCALF <[log in to unmask]>
To: [log in to unmask]
Sent: Tue, Jan 26, 2010 2:20 am
Subject: Re: [TN] Someone knows SEAL BRITE COATING?
I would be surprised if this product is still available, especially in
t's original form. As others previously stated, it was rosin in solvent.
he problem with the original product is it required either solvent or
emi-aqueous cleaning after soldering. In today's world of no clean
luxes, this product would not work. Perhaps they have formulated a no
lean version.
Regards,
Bob Metcalf
totech Western Regional Manager
Cell 714-334-7667
-Mail [log in to unmask]
This e-mail and any attachments hereto are business documents of Atotech
SA Inc. and may contain CONFIDENTIAL OR PROPRIETARY BUSINESS INFORMATION.
nauthorized disclosure and/or use of information contained in this email
s prohibited. If you are not the intended recipient, you may not read,
se, disseminate or copy this message or any other files transmitted with
t.
Mike Fenner <[log in to unmask]>
ent by: TechNet <[log in to unmask]>
1/25/2010 08:17 AM
lease respond to
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Subject
e: [TN] Someone knows SEAL BRITE COATING?
blast from the past.
ealbrite was a Lonco product, a solution of rosin in solvent that was
ffectively a simple varnish. Air or oven dried. Worked OK.
Alpha Metals had equivalent products Alpha [2301 2302 etc] which aped it
easonably well. What happened when everything, including Enthone and
heir
roducts, became Cookson I don't know. Most likely these simple materials
ere let go in favour of Enthone's modern OSPs.
Regards
ike
----Original Message-----
rom: TechNet [mailto:[log in to unmask]] On Behalf Of Charming Chan
ent: Monday, January 25, 2010 3:27 PM
o: [log in to unmask]
ubject: [TN] Someone knows SEAL BRITE COATING?
Hello All,
Does anyone help input something about surface finish SEAL BRITE COATING?
ot a talk with pcb fab shop today and I was told that there was SEAL
RITE
OATING available for pcb surface treatment. I know nothing about such
urface finish and I'm quite curious. Thank you.
Best Regards
harming Chan
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