http://www.lineagepower.com/BinaryGet.aspx?id=03acde1a-bafa-4450-827e-9e2c265ea998&prp=true Inge ----- Original Message ----- From: "John Parsons" <[log in to unmask]> To: <[log in to unmask]> Sent: Thursday, May 14, 2009 9:56 PM Subject: Re: [TN] Bare PCB Packaging Requirements > Thanks all so far for your input - keep them coming. Just to be clear, > the > requirement for moisture barrier, the inclusion of a desiccant or moisture > indicator tab was not being questioned but we have received a requirement > to > ship in only ESD safe bags. This is the first request of this kind for us > so I was wondering how wide spread the requirement was. This method of > packaging requires different equipment than we typically use. It is also > not too often in our business that the customer is not concerned with > cost. > Must be nice to be Inge's supplier ;o) > > Regards > John Parsons > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Rob Strecker > Sent: Thursday, May 14, 2009 12:43 PM > To: [log in to unmask] > Subject: Re: [TN] Bare PCB Packaging Requirements > > John, > We have recently asked our PCB supplier to start shipping our boards to > us in MBB's. We did this to protect the boards from moisture as well as > protect the surface finish. We have seen a lot of delamination since > going lead free and it's the last thing we can do to ensure it's not due > to moisture absorption. I believe the new IPC-1601 will stipulate this. > > Rob Strecker > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D. > Sent: Thursday, May 14, 2009 1:12 PM > To: [log in to unmask] > Subject: Re: [TN] Bare PCB Packaging Requirements > > 1. The same moisture barrier bags that are ESD-safe Faraday bags also > work well as moisture barrier bags for shipping and storing PWBs. These > Faraday bags often work well for storage of the CCA during assembly. Why > use two different types of bags if one fits the bill? Non-ESD > polyethylene bags are notorious ESD generators. I wouldn't want them in > my factory. > > 2. Many CEMs and OEMs have requirements for the PWBs to be shipped in > MBBs, in order to prevent against surface finish oxidation in the case > of IAg, ISn, HASL and FTL finishes. Some invoke a requirement such as > IPC 4552 or 4553 in order to ensure the boards are dry and hermetically > sealed. > > 3. All PWBs absorb moisture from the air. Having the boards sealed > prevents excess moisture ingress, in some cases if the boards are > shipped in sealed bags with desiccant, the user may not need to pre-bake > if they are able to successfully perform Kanban pull from the fabricator > within a short time frame. This, of course, requires qualification and > validation of the process and procedures. > > So, if a bag is required, use one from start to finish that meets > multiple requirements. > > I assume you understand why moisture within the PWB is not a desirable > condition. > > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of John Parsons > Sent: Thursday, May 14, 2009 1:37 PM > To: [log in to unmask] > Subject: [TN] Bare PCB Packaging Requirements > > Tell us, how many CEM's out there are demanding that bare PCB's be > received > in vacuum sealed moisture barrier anti-static bags. If so, what is your > reasoning? Just to be clear my focus here is "anti-static" not the > moisture > barrier properties of the packaging. > > > > Regards > > > > John Parsons > > > > > --------------------------------------------------- > 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 > ----------------------------------------------------- > > --------------------------------------------------- > 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 > ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------