Have a look at the dimensions of this chip: http://cds.linear.com/docs/Datasheet/1068fb.pdf I have not looked up yours but based on Bob Blick's response, it looks like= is larger than the link I posted. If that's true, I use this chip and reg= ularly successfully solder it. I line it up on the pads and hold it in pla= ce with a tool in one hand. I get a tinned soldering iron and touch a few = pins to tack it down. Then I get the soldering iron and solder and I "blob= " solder along the row of pins on the opposite side. Once finished I do th= e same on the side I tacked down. At this point all pins are covered in a = bead of solder. Next I get desoldering braid and I suck the solder up. Th= is removes most of the solder including any connections between adjacent pi= ns leaving only a little solder under each pin to the pad. I also do this = with the Philips LPC2148 ARM processors. http://ics.nxp.com/products/lpc2000/lpc214x/ =20 It's hard psychologically the first time you do it, but after you see how e= asy it is and see it work, no problem. I very rarely have an issue doing i= t this way. The only problem I have had is not a short between pins/pads b= ut one that isn't making electrical connection to a pad. This has happened= only twice and was fixed by touching the pad with the soldering iron to re= heat. And this is very rare. Good luck, FJ =20 > From: bobblick@ftml.net > To: piclist@mit.edu > Subject: Re: [EE] Soldering BGA > Date: Fri, 14 Oct 2011 18:05:02 -0700 >=20 > On Friday, October 14, 2011 8:41 PM, "V G" > wrote: >=20 > > SIGH. The package is a 9x6 BGA and the ball pitch is 0.75mm. This is > > going > > to be very difficult to design. >=20 > Ouch. 0.75mm is what I would consider micro-BGA, and not anything I > would consider (at this date) possible to prototype with "in house". >=20 > Bob=20 >=20 > --=20 > http://www.fastmail.fm - Or how I learned to stop worrying and > love email again >=20 > --=20 > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .