Electronics Forum | Fri Mar 30 11:05:44 EDT 2007 | realchunks
Hi Chris, A lot of it has to do with your product, t-shooting devices and techs ability. There are ways to determine BGA are at fault. X-Ray is a good way to check for shorts. Insufficients are harder to find. Some people use a dye. They squirt
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 | Mon Nov 26 22:05:34 EST 2007 | shy
currently i'm open my stencil aperture is 80% from the land pattern. is this will cause insufficient solder at the terminal component or not? the stencil thichness is 6mil and the board run using SMT pallet which i consider there will be no option f
Electronics Forum | Wed Jul 02 19:10:45 EDT 2008 | arminski
Hi, Say I'm going to calculate my PPM and DPMO, do I have to include in my defects data an item that the root cause is already identified? example is if I have 4 components with Land Design issues (incorrect dimension) and is causing me insufficient
Electronics Forum | Thu Jun 25 11:11:13 EDT 2009 | bruna
Hello, I want to hear some experience about selective soldering for PCB using nozzle plate and screens Do you have solder defects? bridges and insufficient soldering? How do you combat that? and about the screens you have good quality? What is the f
Electronics Forum | Mon Jul 13 07:10:17 EDT 2009 | hcarrasco
1.- If you are using polyurethane squegges , they ned to be changed. 2.- Verify your printing parameters of pressure & Speed , It seems that your pressure & speed are high. 3.- If you are seeing excess in one side and insufficiency in the opossite
Electronics Forum | Fri Sep 25 16:38:56 EDT 2009 | esoderberg
empf issued an excellent study of calculated solder volume in the 90's. It used lotus 123 but is easily used in excel. I have used it for over 10 years. The only thing wrong is with leadless components. the amount of paste required generally is insuf
Electronics Forum | Sat Nov 07 14:05:43 EST 2009 | doremi
Hi, I have 4 years as an AOI Process Engineer and we are working with 3 types of AOI - Marantz 22X, VI3000 and Omron (RNS & VT-WIN2). For solder joint inspection (solder meniscus quality, insufficient solder, wetting problems, shorts (bridges) Omron
Electronics Forum | Tue Sep 14 21:03:42 EDT 2010 | genesan
Hi Sir, The diameter of the aperature is 17mil and thickness 6mil and since we are using Solder Paste Inspection i believe that should have a good paste deposit on this pad.Let say if no good paste it will more create insufficient solder which X-RAY
Electronics Forum | Tue Oct 05 18:05:56 EDT 2010 | jry74
I have seen an increase in components with contaminated leads, mostly SMT parts. They give us solder wetting problems and insufficient solder joints. Our practice is to not use them and return them to the manufacturer. Are these parts solderable?
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