Thanks Rex! (And thanks to Blair and John Burke for your inputs) This is double sided PCB, we want to capitalize primary and secondary in a single test process. The press down fixture we are assessing will have probes from top and bottom. Based on inputs, it seems we have to consider a lot of variables and its volatile. I just want to ensure that I'm in sync with other industrial players and I believe the selection of press down fixture for PCB thickness 1.2mm is not desired. What is your general inputs for a vacuum fixture? I presume this works well for PCB thickness 1.2mm. Any input? Regards, Gobi -----Original Message----- From: Rex Waygood [mailto:[log in to unmask]] Sent: Tuesday, March 09, 2010 10:33 PM To: TechNet E-Mail Forum; Gobinathan Athimolom Subject: RE: [TN] PCBA Test Choose a good fixture manufacturer and talk to them. At least one fixture manufacturer will do a FEA of your board and the fixture to ensure correct low stress hold down. In the past we have tested thin PTFE based pcbs using a lid which held down the whole of the back of the board (single sided). You have not said if your uut is single or double sided, mixed technology etc. Regards Rex Rex Waygood Technical Manager Hansatech EMS provides value manufacturing through engineering and quality Hansatech EMS Limited Benson Road Nuffield Industrial Estate Poole Dorset BH17 0RY +44 (0)1202 338200 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Gobinathan Athimolom Sent: 08 March 2010 07:37 To: [log in to unmask] Subject: [TN] PCBA Test Hello Technet, I'm looking forward your invaluable input concerning ICT test on PCB that has thickness of 1.2mm (0.0472") in total. What are the issues that we might run into if the PCB (thickness 1.2mm) is subjected to ICT using press down fixture instead of vacuum fixture? In term of reliability and repeatability. Thanks, Gobi ______________________________________________________________________ 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 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email ______________________________________________________________________ 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 -----------------------------------------------------