Carey Such as? Brian Carey Pico wrote: > To all > > I've been keeping out of this discussion. But one thing I don't get... why > isn't the board industry looking at a fluxless process? > > Carey > > -----Original Message----- > From: Kelly M. Schriver <[log in to unmask]> > To: [log in to unmask] <[log in to unmask]> > Date: Tuesday, January 04, 2000 2:52 PM > Subject: Re: [TN] cleaning flex circuits > > >Hi Nancy - > > > >To begin with, the cleaning media is driven by the particular flux you are > >using. This, in turn, will drive the issue of what equipment you may be > >able to use for the process. I have had good success removing RMA residues > >from flex circuits with quite a number of blended solvents in vapor > >degreasers and conveyorized spray systems. Size of the flex assembly must > >obviously be considered - there are a number of suppliers who can provide > >cleaning baskets to restrain small flexes for processing thru conveyorized > >cleaning systems. Manual cleaning would not be my first choice if I were > >dealing with a high reliability article, particularly if it were to be > >conformal coated. > > > >Another possibility might be one of the saponifiers, in either a heated > bath > >or a "dishwasher" type system. > > > >If you are not currently using a low residue ("no clean") flux, might that > >be a possibility? If this is a consideration, and you plan to conformal > >coat or use adhesives on the assembly, be sure to verify full compatibility > >of the flux residues and the specific coating material you intend to use > >before proceeding. > > > >Contact me directly if I can be of assistance. > > > >Regards - Kelly > > > > > > > > > >-----Original Message----- > >From: Nancy M. H. Holloway <[log in to unmask]> > >To: [log in to unmask] <[log in to unmask]> > >Date: Tuesday, January 04, 2000 10:57 AM > >Subject: [TN] cleaning flex circuits > > > > > >>TechNet, > >> > >> What is the best technique to clean flux off of a polyimide flex > circuit > >>after population? Thus far, we have been cleaning the flex circuits with > >>alcohol but it is time consuming and tedious. We use a machine to clean > >>rigid boards, but I am hesitant to use it for our flex circuits. How are > >>you all cleaning your soldered flexible printed circuit boards. > >> > >> Thanks, > >> Nancy > >> > >>############################################################## > >>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 > >############################################################## > > > > ############################################################## > 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 ##############################################################