Phil Nutting, it should be no problem whatever you select if you have a normal production rate. Where I used to work, there came a truckload with boards in the morning and before the week was gone, all boards were ready for shipment. With such a short storage in air, I think it does not matter which finish you use, because the boards Feel Nothing. If the boards are stored for months, then I think ENIG boards ought to be vacuum or Nitrogen bagged. I can tell you that the company I refer to, has until today consumed more than five millions ENIG boards. //Inge On 15 September 2011 19:00, Phil Nutting <[log in to unmask]> wrote: > Hello Technetters, > > We are having a discussion about the merits of both ENIG and LFHASL. In > 2006 when we switch to a RoHS compliant process we evaluated many board > finishes and decided, for our volumes, that although ENIG was more expensive > it was more robust. LFHASL wasn't ready for prime time, Immersion Silver > was great but required careful storage and handling, OSP was not something > that fit our process. > > Now that LFHASL appears to be more main stream we are reconsidering it. > ENIG is not always done in-house at some of our fab shops, so that adds > time and money to the delivery. These shops now have LFHASL in-house, so > there is a potential for some savings here. We have been given stories of > storage issues with LFHASL and other concerns too. > > As I recall, the industry recommended method of storage of bare circuit > boards is in a sealed bag with desiccant, regardless of board finish. > Leaving bare boards unwrapped and in an open bin is just plain bad practice > especially if near the ocean. > > Several of us here think LFHASL is now right for our processes. > > Please advise if we are off base. > > Phil Nutting > Design for Manufacturing Engineer > Kaiser Systems, Inc. > 126 Sohier Road > Beverly, MA 01915 > Phone: 978-922-9300 x1310 > Fax: 978-922-8374 > e-mail: [log in to unmask]<mailto:[log in to unmask]> > www.kaisersystems.com<http://www.kaisersystems.com> > www.linkedin.com/in/philnutting<http://www.linkedin.com/in/philnutting> > > > ________________________________ > Note: All the information contained in this e-mail and its attachments is > proprietary to Kaiser Systems, Inc. and it may not be reproduced without the > prior written permission of sender. If you have received this email in > error, please immediately return it to sender and delete the copy you > received. > > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 16.0 > 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 > For additional information, or contact Keach Sasamori at [log in to unmask] or > 847-615-7100 ext.2815 > ----------------------------------------------------- > ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------