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 ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------