Is that little bit of flux enough to stop the parts from bouncing off the PCB? The Y-movements on my Mydata are quite violent and without the tackiness of the paste the parts would definitely be thrown right off the PCB. Ryan Date sent: Fri, 9 Apr 1999 08:26:35 -0600 Send reply to: "TechNet E-Mail Forum." <[log in to unmask]>, "Peterson, Gary D" <[log in to unmask]> From: "Peterson, Gary D" <[log in to unmask]> Subject: Re: [TN] bare boards with solder paste To: [log in to unmask] > I found that the solid solder deposit is terrific for fine pitch parts. We > used a commercial process called Precision Pads Technology (PPT) to solder > mini-bgas we developed in-house. The parts had 10-mil balls on 20-mil > pitch. They were a breeze to solder with the PPT solder deposits on the > boards. I also found that the PPT allowed us to solder PLCCs in Vapor-phase > Reflow systems (not very popular these days due to the CFC ban) without all > of the solder wicking up the leads. I'd use it for all of our boards it > were up to me ... I'm not sure why it hasn't caught on in the industry. > > Gary D. Peterson > Sandia National Labs > > -----Original Message----- > From: Lustig, Steven K.. [mailto:[log in to unmask]] > Sent: Thursday, April 08, 1999 4:48 PM > To: [log in to unmask] > Subject: [TN] bare boards with solder paste > > > TechNetters, > > Does anyone have experience using boards that come in with a form of > solder paste already on the pad so that all you need to do is apply some > flux (much less precisely than solder paste application needs to be) and > then go ahead and place your parts, followed by reflow? My boss has a > brochure from one of the companies which offers this service and I was > wondering how well they work. > > Thanks. > > -Steve > > Steven K. Lustig > Process Engineer > EMS Technologies, Inc. > Norcross, GA > (770) 263-9200 x4714 > [log in to unmask] > > ################################################################ > TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section > for additional information. > For technical support contact Hugo Scaramuzza at [log in to unmask] or > 847-509-9700 ext.312 > ################################################################ > > ################################################################ > TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional inform ation. > For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 > ################################################################ > ----------------------- Ryan Chase Manufacturing Engineer GE Harris 403-214-4502 Fax 403-287-3107 [log in to unmask] ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################