Electronics Forum | Thu Feb 20 17:18:24 EST 2003 | davef
Give us infortmation, please. What is [are]: * Height board to board side of the interposer on the low side of uBGA * Height board to board side of the interposer on the high side of uBGA * Alloy of solder balls, no paste was used correct? * Type of
Electronics Forum | Thu Apr 26 01:14:42 EDT 2007 | JJ
Hi all, We plan to buy solder paste height measurement machine. However, not sure which is the better one..2D or 3D? As far as I know,3D is quite slow and but more accurate in term of measurement result. Pls share with me if anyone who has this e
Electronics Forum | Thu Apr 26 11:40:10 EDT 2007 | CL
Good Morning, We have a 3D solder paste inspection machine. We purchased it on a recommendation from a consultant. We are a CM high mix low volume. The President of my company has attended some seminars and meetings where it was conveyed to her that
Electronics Forum | Thu Apr 26 13:17:10 EDT 2007 | jerrysaise
�It adds NO VALUE whatsoever to do 3D inspection as part of in-line production.�
Electronics Forum | Fri Apr 27 11:24:53 EDT 2007 | realchunks
Hi Steve-O, Good question(s). This process was set-up by an engineer that had a PhD in statistics, took him a year to develop and then thru it over the wall at us. The biggest problem we saw was SPC to measure solder volume. SPC is good for measu
Electronics Forum | Thu Apr 26 16:43:16 EDT 2007 | Upper Management
Seminars and meetings are the best way to get a clear understanding of a machine's capabilities. I have found that the manufacturing engineers will oftentimes skew the results of machine evaluations with facts and data. In practice, I've found it
Electronics Forum | Thu Apr 26 01:42:56 EDT 2007 | Haris
Hi, yes may be 3d is slow but it gives you great results as it shows the height while 2d picture shows error when the paste in your machine appears to end i.e. when it see that the pad starts to appear. I don't know which company brand you prefer but
Electronics Forum | Thu Apr 26 11:21:26 EDT 2007 | slthomas
Question...when the machine said something was wrong, was it reading something wrong (false failure), or was there a true descrepancy but not one that resulted in a bad connection (bridge or insufficient)? Also, did you perform a DOE on the process
Electronics Forum | Thu Apr 26 09:03:35 EDT 2007 | ck_the_flip
3d is good for initial verification that your screen printer and stencil is producing the desired paste height. 2D verification is more than sufficient during regular production. That being said, your best bet for a 3D machine is to go cheap - buy
Electronics Forum | Fri Apr 27 10:33:58 EDT 2007 | ck_the_flip
Jeremy, well said! Thanks for "validating" my theory... LOL I agree that the sampling frequency, AND methodology are key things with 3D inspection. 3D will give you some insight onto how your paste (rheology, viscosity, thixotropy)AND process are
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