Many suppliers of solder mask do compatibility testing with the most popular fluxes. We normally conduct this testing every year to keep the information current. Contact your current solder mask supplier to see if they can help you with compatibility issues. If you are unable to get this information, give me a call, I would be happy to help you. Bob Metcalf Morton Electronic Materials 714-730-8356 >>> annie laberge <[log in to unmask]> 04/28/97 08:07am >>> Hello Technet...I have a question regarding this discussion: How can I know if a soldermask is compatible with a flux ? Do the suppliers of mask / flux have this information ? Or we probably need to do some tests...What kind of test ? Thank you in advance >Resent-Date: Thu, 24 Apr 1997 17:58:30 -0700 >Resent-Sender: [log in to unmask] >Old-Return-Path: <[log in to unmask]> >Date: Thu, 24 Apr 97 17:12:46 cst >From: "ddhillma" <[log in to unmask]> >Encoding: 52 Text >To: [log in to unmask] >Cc: [log in to unmask] >Subject: Re: Solder bridging after wave solder >Resent-Message-ID: <"dIt133.0.EbD.gozNp"@ipc> >Resent-From: [log in to unmask] >X-Mailing-List: <[log in to unmask]> archive/latest/12234 >X-Loop: [log in to unmask] >Resent-Sender: [log in to unmask] > > Hi Elizabeth - > > You might try investigating the compatibility of the soldermask and > the flux chemistry. I have found that the soldermask texture (i.e. > either shiny/smooth or matte/rough) and the specific flux interaction > is very important. The general industry trend is that shiny soldermask > will have more solderballs/bridging than matte soldermasks but I have > found that with certain flux chemistries I can use shiny soldermasks > with no solderball/bridging problems. Good Luck. > > > Dave Hillman > Rockwell Collins > [log in to unmask] > > >______________________________ Reply Separator _________________________________ >Subject: Solder bridging after wave solder >Author: [log in to unmask] at ccmgw1 >Date: 4/23/97 7:19 PM > > >Dear Technet, >I have a customer who is reporting bridging on the solder side of the board >after wave soldering. I have seen the boards, and they look quite messy, >with solder sticking to the mask as well as between component leads and >pads. The mask itself is adhering nicely. The mask is PC501 from Haven, >with C101 hardener. This was recently discontinued by MacDermid and picked >up by Haven. The flux is no clean, ENFLUX NCF-8660, and is under pressure >with nitrogen. The wave itself is at 500 degrees F, with preheats set to >get the board to 210 to 220 degrees F when it hits the wave. The same >design board with LPI ran fine, so I do not suspect a problem in another >area of the process. > >No other customers are reporting this problem, and I am at a loss as to >where to investigate further. The customer is not happy, and wants a >resolution today! If anyone has any insights, please let me know. > >Thanks, >Elizabeth Falk >Process Engineer, Beaverbrook Circuits > >*************************************************************************** >* TechNet mail list is provided as a service by IPC using SmartList v3.05 * >*************************************************************************** >* To subscribe/unsubscribe send a message <to: [log in to unmask]> * >* with <subject: subscribe/unsubscribe> and no text in the body. * >*************************************************************************** >* 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 subscribe/unsubscribe send a message <to: [log in to unmask]> * >* with <subject: subscribe/unsubscribe> and no text in the body. * >*************************************************************************** >* 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] * >*************************************************************************** > > > -------------------------------------------------- Annie Laberge -------------------------------------------------- Matrox Electronic Systems (MES) *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * 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 subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * 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] * ***************************************************************************