Electronics Forum | Thu May 09 13:49:24 EDT 2013 | davef
First, it appears that your solder mask and your coating material appear to be incompatible. Second, IPA leaves a residue that's probably not compatible with your coating material, either. IPC-HDBK-830 - Guidelines for Design, Selection and Applic
Electronics Forum | Sun May 19 23:38:57 EDT 2013 | shrikant_borkar
We are EMS. Later revisions and Other models are get Modified. Now we have some remain Stock of Pcbs abd there end also. We have taken trial with Reduction in Apparatuses. But even small amount of solder paste at thermal Pad is causing QFN lift up.
Electronics Forum | Tue May 21 15:37:36 EDT 2013 | armelinda
I am looking for a service providing non contact PCB flatness measurement for open board SiP assembly. It was returned for failure analysis with complaint that assembly does not solder properly onto customer system board. Since there are remnants o
Electronics Forum | Mon Jun 17 09:52:33 EDT 2013 | sara_pcb
My circuit board contains 11 x 11 matrix 1mm pitch BGA, The device was tested in socket on evaluation Board. We handed over the actual PCB & devices for re-flow. The assembly house first re-flowed all the SMT components other than BGA. BGA was placed
Electronics Forum | Mon Jul 01 11:29:02 EDT 2013 | hegemon
I am guessing a lead free process. From the pictures, I don't neccessarily see any issues, perhaps the leads have wicked up a little too much solder, making the joint look a little starved. But I think I see nice toe and side fillets. In the worst c
Electronics Forum | Thu Sep 19 10:15:36 EDT 2013 | sara_pcb
We have a PCB to be populated using reflow soldering. The board contains lead free BGA device(11x11, 1mm pitch ) and Standard SMT devices which are not lead free. Since profile temperature is different for both devices, our contract assembly house is
Electronics Forum | Mon Sep 23 12:59:12 EDT 2013 | pauldavis4
New pcba supplier sent us first article pcbas (SMT, Wave & hand solder operations) that failed our testing due to no-clean flux residues found under ICs and around passive capacitors. Second lot came in and had 100% pass yield, but we still see a cl
Electronics Forum | Thu Sep 26 15:51:14 EDT 2013 | jdengler
We use JBC here. I like the response time of the iron tip. When soldering, the tip temperature does not drop as much as the Weller's we used to use. I like the ease of changing tip sizes. I dislike the cost of replacement elements. The tip and
Electronics Forum | Thu Oct 10 04:12:37 EDT 2013 | alexeis
Hi, We have software tool, called TopoQC, that displays topologically CAD view with failures and calculates solder points by one click. Also, you can calculate DPMO & Six Sigma values on the same screen. You can read about it on our website: http:/
Electronics Forum | Fri Oct 11 16:17:17 EDT 2013 | scdunlap
In your experience, what is the most popular CAD > package in use today? > > Also, does anyone have > an automated and/or quick way of counting the > solder points on an assembly based on either > gerbers or CAD data? We use GCPrevue to view
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