Bill, There has been some speculation that with the higher assembly temperatures of lead-free, that PCBs should have a Moisture Sensitivity Level - just like the components being mounted on them.? However, I don't think JEDEC will step up to the plate to adopt anything to do with PCBs.? So, it would be the job of the IPC to do that.? With the upcoming IPC meeting in late September, Schaumburg, Illionois, now would be a good time to debate the need for circuit board MSL levels. As pointed out, the group working on Storage and Handling will go a long way, but moisture absorbsion propensity is also a property of the resin/glass composition of the board.? How about it TechNetters? Denny Fritz MacDermid, Inc. -----Original Message----- From: [log in to unmask] To: [log in to unmask] Sent: Tue, 26 Aug 2008 7:19 pm Subject: [TN] Moisture in PCB Assemblies Fellow TechNetters:? I was asked a question by a valued customer if there is any other references made to moisture in raw PCBs and populated assemblies other than the J-STD-033 and also the IPC rework standards.? I've looked in IPC Standards I have on file however I could not find any references/guidlelines at all.? Can anyone out there shed some light on this??? I thank you folks in advance for your efforts on my behalf. Bill Black Medco Q.A. Manager Tel:? 631-667-9699 E-Mail:? [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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------