Eugenio, Since you are using Entek 106A (multi-pass OSP) you typically have a shelf life of 6 months, if properly stored or less if not properly stored. SnPb finishes typically have the same shelf life as OSPs and should be Nitrc Acid striped and re-HAL to remove the IMC which plagues the solderability. In using OSPs you must have handling procedures in place that are different from HAL boards. Also investigate the method of storage. Some OSPs will need re-coating after 3 months in severe environments. Conduct some solderability tests with your OSP and identify shelf life in your environment. John Gulley - QA INET Inc. ______________________________ Reply Separator _________________________________ Subject: ASSY: OSP coatings Author: [log in to unmask] at Internet Date: 1/13/97 6:38 PM Dear Tech-netters, We are experiencing solderability problems with boards which are OSP (Entek-plus-CU-106) coated by our supplier and have been in our storage facility for just on 12 months. Does anyone know of any guidelines (published or experience-based) for shelf life and protection requirements in storage of boards with this type of coating ? Thanks in advance. Eugenio Bini ERG Ltd. 247 Balcatta Rd. Balcatta, WA 6027 Australia Tel:+61-9-2731174 Fax:+61-9-2731450 email: [log in to unmask] *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************