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| Ask the Experts Index | |||||||||
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Nov 12, 2025 How to Re-qualify BGA Spheres What procedure would you recommend to "re-qualify" a lot of BGA spheres. We keep our spheres in a ... J.D. Dec 1, 2022 Pick and Place Machine Calibration In general how often should we calibrate pick and place machines, or run a placement machine process capability ... B.O. Nov 30, 2022 Extending Shelf Life for Jars of Solder Paste We have a few unopened jars of solder paste that have just recently gone past the posted expiration ... Y.S. Nov 29, 2022 Profiling for Double Sided BGA We are about to produce double sided BGA boards - BGA components on both sides. What advice would ... B.O. Nov 28, 2022 Solder Balling Prediction Formula We have experienced mid chip solder balling on some passives. Is there a mathematical calculation that can be ... R.W. Nov 23, 2022 Stencil Cleaning Frequency What is the industry standard for the amount of time between stencil cleaning? ... C.C. Nov 22, 2022 Exposed Copper Risk We received many PCB's where a modification have been completed. The modification involved soldering a chip cap to ... A.H. Nov 21, 2022 Initial Screen Print Test Board Is it recommended to print one cycle before printing the first production board? I could use a scrap ... S.G. Nov 18, 2022 Stencil Pattern for Thermal Pads on QFNs We need more information regarding the stencil pattern for thermal pads on QFNs. We know why it is ... C.P. Nov 17, 2022 Moisture Sensitivity Level for Bare Boards I am trying to ease our way through a NADCAP audit and I am having some trouble with ... J.C. |
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