Electronics Forum | Tue Apr 12 19:22:44 EDT 2016 | szs0080
Hello, I did drop testing of some sample boards which had 15mm SAC105&305 BGA's on them. I polished them real nice and looked it under optical microscope for cracks. Was wondering the etching procedure before looking it under SEM. Thanks
Electronics Forum | Thu Aug 25 04:55:32 EDT 2005 | Khoo Meng Tze, Freescale Malaysia
Hi, Whenever I'm measuring IMC using the optical microscope, I have to make sure that the images captured are clear. If not, then i will have an issue in differentiating the blurry areas between the IMC and solder(for example). This gives variatio
Electronics Forum | Wed Aug 24 04:07:31 EDT 2005 | Khoo Meng Tze, Freescale Malaysia
Hi, I am doing a research on the solder ball joint strength of lead free PBGA package. Coming across a dozen of literatures and journals(and the industry itself), I have found out that the method of measuring intermetallic compound(IMC) formation is
Electronics Forum | Mon Jun 18 15:54:25 EDT 2001 | Gil Zweig
For BGA inspection, it is my feeling that he most effective technique a facility can use is the combination of a transmission x-ray system in conjunction with an endoscope (side viewing optical microscope). In using the transmission x-ray inspection
Electronics Forum | Tue Mar 30 13:26:21 EDT 2010 | swag
We currently use under-stencil wipe for in-process stencil cleaning. Our product goes in sensitive optical equip. Our customer is finding microscopic fibers we believe are coming from stencil wiping paper. Can anyone recommend a different process
Electronics Forum | Sat Mar 09 07:09:44 EST 2002 | davef
Interesting findings. I agree that probably no one does �100% volume measurement and subgrouped Xbar and S charts�. Who would want to spend the money? Isn�t the issue making things, rather than measuring things? The microscope is used to make m
Electronics Forum | Wed Oct 10 20:58:30 EDT 2001 | davef
Several points are: * There�s quite a bit of background on IMC in the fine SMTnet Archives. I�ll try not to duplicate it. * If you have a smooth and well-formed solder connection using fairly common materials, you assuredly will have IMC. Any evide
Electronics Forum | Sat Jan 16 02:43:21 EST 1999 | Earl Moon
| Hello, | | We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. | | So far, the tests I can think of performing, and that we have
Electronics Forum | Thu May 05 12:30:48 EDT 2005 | jsk
Align the optics (calibrate) Who can provide this service? (other than the manufacturer) Thanks,
Electronics Forum | Tue Jun 05 06:45:46 EDT 2001 | jackofalltrades
I am not in your area to provide physical assistance, but I'm full of advice. Keep in mind you get what you pay for. One thing you can do is what you have done here, watch this forum and others like it. You will see where the short comings are. Obvio
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