Jean-Francois, et al, several years ago, I did a repeatability and reproducibility study of a micrometer, for measurement of conformal coating thickness. I found it to be an acceptable method for determining conformance to IPC A-610. For process control, I did attempt to judge. For anyone who is interested, IPC has a nice test method for measurement quality: http://www.ipc.org/4.0_Knowledge/4.1_Standards/test/1-_1-9.pdf Associated with it in the test methods page is a spreadsheet calculator and user guide. Louis Hart Compunetics -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Jean-François Bissonnette Sent: Wednesday, June 23, 2010 11:52 AM To: [log in to unmask] Subject: [TN] Conformal Coating measurment Hi Technetters, What is the proper method for measuring conformal coating thickness? Were're using a micrometer but I doubt that the method is reliable. A wet gauge is not out of the question but we would prefer to measure thickness once the coating is cured. Thanks! Jean-François Bissonnette [log in to unmask] ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------