Roger, I am wondering if we can make your last statement so definitive. During the early 90's boards were not made as well as they are now and we did have to bake them - from certain manufacturers. I am wondering with the higher temperatures for Pb-free soldering if we might see the problem raise its ugly head for some of the lower end suppliers. I don't know, I'm just asking. Bev RIM -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Roger Stoops Sent: May 11, 2005 9:52 AM To: [log in to unmask] Subject: Re: [TN] MSL? MSL = Moisture Sensitivity Level, defines and characterizes how an IC/xstr/dio/etc. package will withstand exposure to temperature and humidity over time. Specifically important for defining what process or procedure to use in assembling semiconductors to a pcb. The MSL level has become more of an issue with RoHS due to the elevated reflow temps. J-STD-020 describes this in more detail; the lower the number, the more robust the part. The Jedec std is free on the 'net. Doesn't really pertain to PCBs. Regards, Roger -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Eddie Rocha Sent: Tuesday, May 10, 2005 6:23 PM To: [log in to unmask] Subject: [TN] MSL? I'm a PCB fabricator, and I have a survey asking me several general questions related to RoHS with one being moisture sensitivity level (MSL)? What exactly are they looking for? Does this pertain to bare PCB's? -- Thanks, Eddie Rocha South Bay Circuits (480) 940-3125 x122 --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. --------------------------------------------------- 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 -----------------------------------------------------