I have seen a very interesting report done by Irlandus circuits IRELAND It was done with Coates LPISM using 4 different finishes and a few different fluxes. They have some interesting graphs that show the relationship between different fluxes and LPISM You can get a copy of the report from Irlandus or ASI/ Coates AFRI Canada On Mon, 29 Sep 1997, Phil Bavaro wrote: > We have run some preliminary experiments with this soldermask after running > the same testing on about six other mask materials. > > The results were good enough to convince us to try some real production > lots with it. We are right in the middle of this confirmation effort at > present. > > Solderball free was not an accurate description, but the preliminary > results indicated a 90% reduction compared to next best mask. > > We currently use Enthone DSR-3241 which leaves plenty of wavesolderballs > (although they are very small) behind. > > As far as the comment about the relationship between the mask and the > wavesolderballs, it is only one factor in a complex process, however it is > a factor which we can control. Quantity of flux applied to the board and > the preheating have to also be optimized for the least conducive conditions > to create solderballs. > > I would appreciate hearing any information/comments on this subject as this > has been a thorn in our sides for a long time now. > > > Phil > ------ > > > > At 2:40 PM +0300 9/29/97, Johannes Sivula wrote: > >Hi, > >You wrote: > > > > Could anyone share any experiences with me about Carapace Electra LPI > > which was claimed solder ball free with no-clean? > > Please reply to me directly. > > As always, look forward to your helpful replies. > > Thanks, > > Yuan > > Exabyte > > > > > > > >Did you get any replies ? If you get any, please forward them to me. > >I would appreciate that. > >By the way, how did you come by the idea that solder balling has something > >to do with solder mask ? > >I have read that that is the case, but I have not seen any serious report > >to back up my idea. > >Brs, > >Johannes Sivula, Reliability Engineer, > >Tellabs Oy > > > >############################################################## > >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. > >For the technical support contact Dmitriy Sklyar at [log in to unmask] or > >847-509-9700 ext.311 > >############################################################## > > > > Phillip A. Bavaro > Senior Manufacturing Engineer > [log in to unmask] > (619) 658-2542 > > ############################################################## > 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. > For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 > ############################################################## > ############################################################## 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. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################