what procedures are being used to verify adhesion of conformal coating over no-clean solder paste? We use a moisture cure silicone. A few years ago we had three of the major solder paste manufacturers perform SIR tests and coating adhesion tests. Most tests referenced the ASTM-3359 which describes cutting a cross hatch pattern in the coating and performing a tape peel test. This procedure also has a classification ranking for the results. We found that only one of the labs followed this procedure and the others had either modified or developed a different test since silicone coating is difficult to apply tape to. There was no issues with the acrylic coatings tested. Two of the three labs used the IPC-B-24 test boards. What proccess is a fair test for silicone coating adhesion? If ASTM-3359 is used what tape brand meets the specifications given. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 -----------------------------------------------------