Jack, Our normal manual clearance is .06", to prevent wicking on any leaded type of component. If you have small isolated areas to mask, this will work. But if it requires a lot of different components/areas, you will be driving touch time and intricate masking. Perhaps Doug Pauls can provide adequate clearance for automated methods. Jim Carlson Quality/Configuration Manager L-3 Communications Applied Signal & Image Technology 443-457-1111 Ext. 238 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson Sent: Wednesday, January 19, 2011 4:10 PM To: [log in to unmask] Subject: [TN] Conformal Coat vs. Masking Does anyone know a sensible guideline for how much space to leave between conformal coated areas and other areas that should NOT be coated? We have some high voltage areas of circuitry that need to be coated, near other connectors and mounting holes that will not be coated. The problem is, the assembler is asking for far more "isolation" than the engineers! (might it be a different clearance for manual vs. in-line?) Seems like this would be common knowledge, but I just can't find it anywhere... thanks, Jack --------------------------------------------------- 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.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ 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.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------