Thanks Louis I think the issue is the transulence of the coating. I think the measurement is done on glass slides for parylene. However, difficulties appear to occur with unclear coatings such as silicones. However, I will pursue this and check. Best Regards Dr Lee Hitchens SCH Technologies is a Division of SCH Services Limited Mob: +44 (0) 7862 25 33 21 www.conformalcoating.co.uk <http://www.conformalcoating.co.uk/> TECHNICAL SUPPORT SERVICE SCH Services Ltd offers a Technical Support Helpline to help address all issues relating to reliability. This includes contamination testing, cleanliness and cleaning issues, plus any coating related questions. Please contact us via email or telephone: [log in to unmask] +44 (0)1226 249019 (office hours & answerphone) +44 (0)7862 253321(out-of-hours emergency) The opinions expressed in this e-mail are strictly those of the sender and not of SCH Services Limited. This communication may contain information which is confidential and may also be privileged. It is for the exclusive use of the intended recipient(s). Unauthorised use, copying or disclosure of any of it may be unlawful. If you are not the intended recipient(s) please note that any distribution, copying or use of this communication or the information in it is strictly prohibited. If you have received this communication in error please notify us by e-mail or by telephone (+44 (0)1226 249019) and then delete the e-mail and any copies of it. Virus Warning - Although steps have been taken to ensure that all email and attachments are virus-free, we cannot guarantee nor be held liable. Company Registration: 04043334 Registered office: SCH Services Limited Newburgh Building McLintock Way Barnsley South Yorkshire S70 6BF On 08/05/15 18:41, "Louis Hart" <[log in to unmask]> wrote: >Lee, it has been more than 15 years, but I measured synthetic diamond >coatings, with thickness a fraction of what I expect conformal coating >should be, on metals with an ellipsometer and an instrument called a >'Nanospec'. The ellipsometer was more accurate, as it measured the >material property (dielectric permittivity, I think it was) of the >specimen then used that to determine coating thickness. The nanospec, if >my memory is correct, had a catalogue of material parameters from which >you called up yours and got a thickness in one observational step. > >Both used a laser, again if my memory is correct. The area of coating >being measured was a tiny spot, much smaller than any dimension of a >component leg I know of. Louis > > > >-----Original Message----- >From: TechNet [mailto:[log in to unmask]] On Behalf Of Lee Hitchens >Sent: Thursday, May 07, 2015 3:50 AM >To: [log in to unmask] >Subject: [TN] Conformal Coating Thickness Measurement on legs of >components > >Hi all > >I am being asked regularly now on options for measuring coating thickness >on legs. I am trying to determine if there is actually a practical >solution? >Cost is less important compared to being a workable relatively quick >process? > >One thing that could be an issue is many times its a silicone coating and >this tends to be less than clear optically. Some systems need clear >coatings to be successful. > >Has anyone had any success with this? > >Best Regards > >Dr Lee Hitchens > >SCH Technologies is a Division of SCH Services Limited > >Mob: +44 (0) 7862 25 33 21 > >www.conformalcoating.co.uk <http://www.conformalcoating.co.uk/> > > > > > > >______________________________________________________________________ >This email has been scanned by the Symantec Email Security.cloud service. >For more information please contact helpdesk at x2960 or [log in to unmask] >______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________