Paymon - if you wish to contact me off line, I have real time shelf wetting balance data for all the surface finishes and was the individual who ran the solderability testing for the 4552 and continue to test samples after 50 months of un-protected storage. Regards Gerard O'Brien. Co-chair 4-14 plating committee 516 609 1230 -----Original Message----- From: Paymon Sani [mailto:[log in to unmask]] Sent: Tuesday, April 03, 2007 9:18 AM To: [log in to unmask] Subject: [TN] ENIG PCB Shelf Life Hello All, What is the expected shelf life for PCBs with ENIG finish? IPC-4552, Table 3-1 suggests the PCBs to meet solderability requirements of category 3 durability with six months shelf life. I would appreciate your response to the following questions: 1- How should the PCBs be handled during this time period? 2- What should be the temperature swing? 3- What should be the humidity range? 4- What if the PCBs are older than 6 months and cost a lot of $? How could we justify to use them? Thank you in advance, Paymon ---------------------------------------------------------------------------- ----------- Confidentiality Notice This e-mail and any attachment(s) are intended for the individual or entity to which this email is addressed and may contain information that is confidential. If you are not the intended recipient or an employee or agent responsible for delivering this e-mail to the intended recipient, please be aware that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this in error, please notify the sender by telephone at 604.430.4336 or by return e-mail, and please delete or destroy all copies of this communication. Thank you! --------------------------------------------------- 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 e-mail and any attachments may contain confidential and privileged information. If you are not the intended recipient, please notify the sender immediately by return e-mail, delete this e-mail and destroy any copies. Any dissemination or use of this information by a person other than the intended recipient is unauthorized and may be illegal. --------------------------------------------------- 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 -----------------------------------------------------