Question is what type of the flux you are using? What is the activation temperature and what is required soaking time for the flux that you are using? The flux's that I am working with activates at 190 but not to exceed 210F(88-99C) and 210 not to exceed 230F (99-110C). My soaking goal is minimum 10 seconds. As much I am able to see from your description, it appears to me that you are overheating assembly and burning off flux before your board hits the wave's. Thank you, Igor . . . -----Original Message----- From: Michael Bell [SMTP:[log in to unmask]] Sent: Wednesday, November 28, 2001 12:00 PM To: [log in to unmask] Subject: [TN] Organic Silver PCB's Hi there Technetters, I have now exhausted my efforts of improving the solderability (T/H) of some RF Organic Silver PCB's we are currently making. Every attempt to improve the solderability has had no impact. The soldered PCB's show very poor wetting, partial joints and in some areas there is no evidence of solder. The PCB is curretly being pre-heated to around 160 deg. C topside and a bath temperature of 256 deg. C. Is there something I am over looking with the Organic Silver? Is there any special method/ or profile for Organic SIlver finished PCB's??? Any feedback would be appreciated. Cheers Mike ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------