It's possible that if this correspondence goes on like some of the threads
here quite a few people will end up semi comatose, but perhaps not in the
way you meant:)
Can we also hear if cross linking only takes place by exposure to UV/light
or is initiated by UV/light. And if initiated how is the cure completed?
Best regards
Mike Fenner
Applications Engineer, European Operations
Indium Corporation
T: + 44 1908 580 400
M: + 44 7810 526 317
F: + 44 1908 580 411
E: [log in to unmask]
W: www.indium.com
Leadfree: http://Pb-Free.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Graham Naisbitt
Sent: Sunday, December 09, 2001 7:01 PM
To: [log in to unmask]
Subject: Re: [TN] 2 Conformal Coating ?'s
Peter,
I am semi-comatose now, so please, tell us what exactly are the advantages
of UV curable coatings?
Regards, Graham Naisbitt
[log in to unmask]
www.concoat.co.uk <http://www.concoat.co.uk>
For instant access to Product Data Sheets register on the Tech-Shot area of
http:// www.concoat.co.uk <http://www.concoat.co.uk>
Concoat Limited
Alasan House, Albany Park
CAMBERLEY GU16 7PH UK
Phone: +44 (0)1276 691100
Fax: +44 (0)1276 691227
Mobile: +44 (0)79 6858 2121
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Peter Swanson
Sent: Friday, December 07, 2001 05:51
To: [log in to unmask]
Subject: Re: [TN] 2 Conformal Coating ?'s
Graham,
You really must see someone about your delusions over UV cured coatings,
which are successfully used to coat many thousands of pcb's each year. I
know someone who has a nice sofa you can stretch out on whilst you tell him
all about it.... <g>
Suitability for UV has nothing to do with 3D v. 2D, more to do with the
complexity of the assembly geometry and the application methodology. These
will determine if a secondary cure mechanism is needed for the application.
In many instances (and with some of our customers), full cure is achieved
just with light.
Regards,
Peter
--
--------------------------------------------------------
Peter Swanson [log in to unmask]
INTERTRONICS http://www.intertronics.co.uk
INTERTRONICS is dedicated to providing quality
material, consumable and equipment solutions to the
electronics manufacturing and other technology based
industries, with the highest levels of technical
support and customer service.
-----Original Message-----
From: Graham Naisbitt [mailto:[log in to unmask]]
Sent: 06 December 2001 16:52
To: [log in to unmask]
Subject: Re: [TN] 2 Conformal Coating ?'s
Mike
You would be better to go with a conventional coating. UV is not ideal for
3D objects - works great in 2D, cos you don't have to bend light! :-)
I cannot remember what the operating environment was for your circuit - if
you would care to repeat, I can recommend something - however, I am sure
that a one part AR or UR coating from a reliable supplier will give you the
best overall results - process and operating environment.
Regards, Graham Naisbitt
[log in to unmask]
www.concoat.co.uk <http://www.concoat.co.uk>
For instant access to Product Data Sheets register on the Tech-Shot area of
http:// www.concoat.co.uk <http://www.concoat.co.uk>
Concoat Limited
Alasan House, Albany Park
CAMBERLEY GU16 7PH UK
Phone: +44 (0)1276 691100
Fax: +44 (0)1276 691227
Mobile: +44 (0)79 6858 2121
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Mike Manwell
Sent: Thursday, December 06, 2001 02:41
To: [log in to unmask]
Subject: [TN] 2 Conformal Coating ?'s
Hello,
Thanks in advance if you have taken the time to read this!
#1- Im trying different materials in a spray application. Both are cured
using UV. One material does a "secondary cure" w/ moisture. This is cool
because after 100 hours after UV cure, all material is fully cured.
The other material Im trying uses HEAT for a secondary cure, or, if
shodowed during UV cure, the material wont cure and never will. Obviously I
dont want the stuff dripping or running anywhere, but being new to this
wonderful process, just dont feel good about leaving uncured material on a
product for it's entire life. Iv been told that you can "test" the product
to see if the uncured material is causing a problem but Im not sure what
type of test that would consist of. Any insight?
#2- Has anyone out there ever installed refelctive metal plates in their UV
oven to limit shadowing?
Thanks so much,
Mike Manwell
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