Ken, I've heard of using an oven to solder these parts, do you know of a URL with definitive info?. How do you get the heat up and down in a suitably quick way without cooking the device you are trying to solder?. tnks, Mike -- On 25 Mar 04, at 21:27, Kenneth Lumia wrote: > Brooke, > > The best way is to use solder paste and a heat > source. Some people use a toaster oven (can't use it for food > anymore) as a heat source and solder a whole board at once. I just use my > wife's (don't tell her) embossing heat gun (avialable at craft stores for > around $25) and do one part at a time. Depending on the part, I can solder 32 > pin QFP's in about 45 seconds by applying heat from the bottom of the board - > apparently the fiberglass transmits sufficient heat to the top. This also > works wonders for voltage regulators that have ground pads under the body > (similar to your case). Heating the board from the top has a tendency to blow > the the part out of alignment (air velocity is too high). > > The down side is that solder paste has a very short shelf life and > must be kept cold when not in use (not in your fridge with food!). > > Ken > > ----- Original Message ----- > From: "Brooke Clarke" > To: > Sent: Thursday, March 25, 2004 9:03 PM > Subject: :[OT] How to solder hidden QPF Ground Pad? > > > > Hi: > > > > I would like to use a PIC12F629 to drive the LTC3205. But the LTC3205 > > only comes in a 24 lead QFP with a ground pad hidden under the package. > > with a note saying it must besoldered to the PCB. Is there a way for me > > to solder this part at home? > > > > Thanks, > > > > Brooke Clarke, N6GCE > > http://www.PRC68.com > > > > -- > > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu