-----Original Message----- From: Dehoyos, Ramon Sent: Wednesday, May 19, 2004 4:30 PM To: 'TechNet E-Mail Forum.'; 'Dacia Super' Subject: RE: [TN] Commercial Grade Life Expectancy Hi Dacia: The studies have to be done in a specific environment with specific materials. Humidity, temperature, air quality, type of material, etc. You can damage a board in couple of years if it not protected properly under harsh conditions or you can keep it safe for decades if it is protected. So what is valid for one board under certain conditions is not for other boards under different conditions. What you might want to find out is what are the methods to protect a finish assembly if it is going to stay in storage for a long period of time, such as bagging it with a desiccant. There are some threads about best types of materials for protective bags in the archives. Regards. Ramon -----Original Message----- From: Dacia Super [mailto:[log in to unmask]] Sent: Wednesday, May 19, 2004 12:50 PM To: [log in to unmask] Subject: [TN] Commercial Grade Life Expectancy All - I looked through the TechNet archives to see if I could find some info.... I found a few good discussions, but not any exact data that I am looking for. We currently produce commercial grade product - and recently a question has been posed regarding the life expectancy of standard commercial grade - post-production - product. Does anyone out there have a specification that I can reference, or seminar notes, or something that I could use as a guide for conformance/expectations? I'm referring to standard product - sometimes single sided, sometimes double - and we employ the standard 3 X's rework rule, don't bake our boards prior to production, etc. Also, is there a longevity difference between Sync product and DDR? Thanks in advance. Dacia --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------