Mr. Moon, Mr. Brummer, and all, It appears that since we did not spec out the construction, our supplier decided to provide us with the cheapest way, unbeknownst to us. We are a small shop without a lot of engineering support. We typically rely on our suppliers to steer us in the right direction. All our lay-ups are conservative and on the high resin side. Former purchasing people here put their trust 100% with the supplier to provide an equally conservative construction. It appears that that did not happen. The more I know, the more I need to know. Tough lesson learned. Thanks for the input. Anne > -----Original Message----- > From: Enter your name here [SMTP:[log in to unmask]] > Sent: Tuesday, August 17, 1999 7:40 PM > To: TechNet E-Mail Forum.; Anne Ledger > Subject: Re: [TN] Innerlayer issue > > Are you talking about weave impressions left from low resin to glass > ratio > materials? If you are, the answer is get away from using that nasty > old > 7628/7629 material facing foil. Go resin rich for no weave impressions > and > better innerlaminar bond strength with better resist adherence. > > Earl Moon > ----- Original Message ----- > From: Anne Ledger <[log in to unmask]> > To: <[log in to unmask]> > Sent: Tuesday, August 17, 1999 5:45 AM > Subject: [TN] Innerlayer issue > > > > Good Morning Technetters, > > > > I have a question for board fabbers. Problem: We are experiencing > > weave texture on our innerlayer material. I have spoken to the > > manufacturer who states that weave does shift in the "pour" of the > > material (when the resin is added) and that there is no > specification > > that controls the depth requirement of the weave. The topography is > > visual prior to lam/image. The condition is causing our resist to > lift > > slightly and allows an etch stain on the double treat foil that so > far > > we can not remove. Question: Is this a typical condition of > innerlayer > > material (other manufacturers)? Is it double treat foil only? Is > there > > a way to remove this type of etch stain? What is the acceptablity > of > > stain on inner layer foil? I can't find any reference info in IPC. > > > > Any and all input would be appreciated. > > > > Anne Ledger > > EMDS, Inc. > > > > ############################################################## > > TechNet Mail List provided as a free service by IPC using LISTSERV > 1.8c > > ############################################################## > > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in > > the body: > > To subscribe: SUBSCRIBE TECHNET <your full name> > > To unsubscribe: SIGNOFF TECHNET > > ############################################################## > > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > > information. > > If you need assistance - contact Gayatri Sardeshpande at > [log in to unmask] or > > 847-509-9700 ext.5365 > > ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################