Rats, I deleted Jeff Bush's responses and others, so I will respond to Victor. What Jeffrey says regarding VAC PAC is true, but....... In the lead free world we are using a solder (SAC305 I presume) that is not as good at wetting/spreading compared to what we are used to (SnPb). It works though (reliability concerns aside). We compound that by using surface finishes that also do not wet as well as what we are used to (HASL). They work too. I tend to favor treating all RoHS surface finishes with respect by keeping the surfaces as pristine as possible without getting ridiculous about it. I don't think separators (special ones for ImAg) are ridiculous. What about the contact with the bag? I'm more concerned with plasticizers and any type of transferrable "organic" exudate from the plastic in hot/humid locales. This does happen. So, when I am faced with solderability "issues", eliminating the possibility of packaging as a source helps move things along a bit faster towards the solution... Regards, Gerry From: "Victor G. Hernandez" <[log in to unmask]> Reply-To: TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask] To: [log in to unmask] Subject: Re: [TN] Packaging requirements for IAg Finished PWBs Date: Mon, 5 Jun 2006 06:59:59 -0500 What can occur if IMAg silver surface finishes touch each other and/or the bag. Victor, -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Gerald Gagnon Sent: Saturday, June 03, 2006 10:40 AM To: [log in to unmask] Subject: Re: [TN] Packaging requirements for IAg Finished PWBs Jeffery, Oops. disagree with you here.... ImAg surfaces must never touch while in the package nor should they touch the bag.. I'd be more than willing to pay for this. Can we trade the cost for leaving out the useless desiccant? Gerry From: Jeffrey Bush <[log in to unmask]> Reply-To: TechNet E-Mail Forum <[log in to unmask]>, Jeffrey Bush <[log in to unmask]> To: [log in to unmask] Subject: Re: [TN] Packaging requirements for IAg Finished PWBs Date: Fri, 2 Jun 2006 11:42:35 -0400 Recommend VAC PAC with not interleaving. Interleaving is and added cost that is not needed as the boards are held tight in the VAC PAC. Jeffrey Bush Director, Quality Assurance and Technical Support VERMONT CIRCUITS INCORPORATED 76 Technology Drive - POB 1890 Brattleboro, Vermont 05302 Voice - 802.257.4571 ext 21 Fax - 802.257.0011 <http://www.vtcircuits.com/> -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Gary Camac Sent: Thursday, June 01, 2006 10:47 AM To: [log in to unmask] Subject: [TN] Packaging requirements for IAg Finished PWBs Good morning all, I am struggling through a rewrite of our material specification for PWBs. I have seen the recommendation that cover sheets and interleaf sheets should be used to prevent scratches on IAg finished PWBs. Have those that are using IAg seen this as necessary? We eliminated this requirement on Sn/Pb finished PWBs some time ago without any negative effects. 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