We do a LOT of conformal coatings for military applications, mostly thermal cure / two part applications...UV cure has all the problems that you speak of. The material that we use has a UV tracer so that we can see problems from the original coating operation.... In my opinion, UV cure coating ONLY, is not a good thing.... -Steve Gregory- > 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 >