I almost hate to admit this but in 1971 when I was Genny, I almost hate to admit this but in 1971 when I was working for Western Electric we ran a non-controlled experiment in the lab and passed out copper clad laminates to employees of different nationalities and told them to put lots of finger prints on them and then we ran them on a G.E.C. meniscogarph to see if we could find soldering differences. To our surprise we couldn't determine and significant differences. Since then I've been intimately involved with PCB soldering and solderability. Although many of our factories didn't use gloves to handle OSP or immersion solder PCBs we did encourage them to handle PCBs only by the edge. We didn't discourage the use of gloves and in fact we encouraged workers who did use gloves to handle PCBs only by the edge. One thing you need to keep in mind most people wear gloves to protect their hands not what they are handling. The outer surface of a glove is only clean if you haven't handled something dirty before handing a PCB. Regards, George George M. Wenger Andrew Wireless Solutions Senior Principal FMA / Reliability Engineer 40 Technology Drive, Warren, NJ 07059 (908) 546-4531 [Office] (732) 309-8964 [Cell] [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Genny Gibbard Sent: Thursday, February 28, 2008 5:00 PM To: [log in to unmask] Subject: Re: [TN] OSP - protection So no special paper required, like the silver saver paper recommended for ImmAg finish boards? We are trying to avoid writing separate procedures for handling different finishes. We wanted to write one standard policy for storage and handling of all our bare boards with just a few simple differences noted, like the use of silver saver paper, that are specific to certain finishes. We thought we'd err on the side of caution and go to more strict levels for all boards, whether or not they need it, unless it involves a significant cost outlay. Use of gloves, for instance - it isn't going to hurt a HASL board to be handled with them, and the handlers already have gloves available for handling boards, since we have told them to use gloves for ImmAg. Storage in a sealed MBB. It is winter on the prairies and the air is very dry around here, but a sealed MBB isn't going to hurt any board, and it may potentially help when the spring thaw hits and humidity shoots up. Not that we typically have much problem with moisture here at any time of year. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D. Sent: February 28, 2008 3:26 PM To: [log in to unmask] Subject: Re: [TN] OSP - protection The salts from your fingerprints are the culprit. If assemblies are washed immediately after handling, studies have shown that the fingerprint oils containing the salts will usually be cleaned away. However, after just a couple of days those same fingerprints actually get much harder to clean off. Also, the salts from any snacks, not just the oils, are bad news. And you must never handle boards with your bare fingers (or any other bare part of your body!) after the final wash just prior to conformal coating, ROSE testing, and epoxy staking. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Nowland, Russell Howard (Russell) Sent: Thursday, February 28, 2008 2:37 PM To: [log in to unmask] Subject: Re: [TN] OSP - protection George, There are a few items that you missed and one was the heavy southern draaawl. The other is you don't need gloves but it is advisable to only hand the boards from the card edges. There are still some bad elements that can transfer to the board and can cause some soldering difficulties. Most of the issues we found were hand lotions and pop corn oil. So no selling pop corn in the vending machines and no Avon or Mary Kay parties in the cafeteria and you don't need gloves. Russell Nowland Alcatel-Lucent Advanced Manufacturing Engineer Address: 14000 Quail Spring Parkway, Suite 300 Oklahoma City, OK 73134 email: [log in to unmask] Desk: 405-302-1660 Cell: 405-203-0034 Fax: 405-302-1622 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Wenger, George M. Sent: Thursday, February 28, 2008 2:27 PM To: [log in to unmask] Subject: Re: [TN] OSP - protection You should point out that none of your customers found glov Lee, You should point out that none of your customers found gloves necessary with either OSP or immersion silver. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Lee parker Sent: Thursday, February 28, 2008 3:01 PM To: [log in to unmask] Subject: Re: [TN] OSP - protection Genny We had over 20 years of experience at the AT&T facility in Richmond with OSPs. Our customers stored the boards side by side with HASL boards and experienced no adverse effects. I will also point out that while gloves give added protection, none of our customers found them necessary. Best regards Lee J. Lee Parker, Ph.D. JLP Consultants LLC 804 779 3389 ----- Original Message ----- From: "Genny Gibbard" <[log in to unmask]> To: <[log in to unmask]> Sent: Thursday, February 28, 2008 12:28 PM Subject: [TN] OSP - protection For immersion silver, we wear gloves when handling them prior to reflow, and we interleave the silver saver paper and seal them in MBBs to store them. We are starting to work with OSP for the first time. What do you recommend for OSP handling? Gloves is a given, but I am wondering about storage. Thanks in advance, Genny. --------------------------------------------------- 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 message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. 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