tag:blogger.com,1999:blog-175004091875960054.post2951409226261192357..comments2024-02-28T04:16:24.345-08:00Comments on Silicon Exposed: The final frontier - 01005 passivesAndrew Zonenberghttp://www.blogger.com/profile/16821509563933020441noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-175004091875960054.post-63449845822408295022012-07-27T14:21:32.130-07:002012-07-27T14:21:32.130-07:00Routing the outer row of balls on any BGA is trivi...Routing the outer row of balls on any BGA is trivial, and the next row in can be done without vias. If you can fit 4 mil traces between balls then you should be good as far as board fab goes (though 4 mil traces aren't exactly cheap...)<br /><br />I have managed to solder 0.5mm BGAs (CPG56 package from Xilinx). My first two attempts were misaligned and the third worked well. You'll need to be very careful positioning the device but it should work out OK.<br /><br />I suggest getting a cheap component of similar pitch and doing some process development tests first. Xilinx CoolRunner-II CPLDs in CPG56 package are relatively cheap (a dollar or two each) and thus would be good for practicing on. All you need is a JTAG programmer to verify that they were soldered properly.Andrew Zonenberghttps://www.blogger.com/profile/16821509563933020441noreply@blogger.comtag:blogger.com,1999:blog-175004091875960054.post-86949324222803483862012-07-27T07:30:42.902-07:002012-07-27T07:30:42.902-07:00Hi Andrew
Just want to give you a vote of encourag...Hi Andrew<br />Just want to give you a vote of encouragement. Really enjoy reading your blog. I've caught the smaller bug but stopped at 0804 which are still easy to hand solder.<br /><br />Lately I've been looking at the Omnivision CameraCube CMOS sensor. It's a 2.5mm package with a 4 x 5 BGA. Approximately a 0.6mm pitch.<br />With 4mil traces it seems just barely doable for the home hobbyist. Any thoughts?<br /><br />Anyway, keep up the good work. Cheers.Dr Iguanahttps://www.blogger.com/profile/07228581336622237935noreply@blogger.com