ERSA mobile scope - camera units with lenses and desk-top holder ERSA mobile scope - solder joint inspection in the twinkling of an eye The ERSA mobile scope is a compact and handy, portable video microscope to inspect solder joints in electronic
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introduction: ZH series is a fully automatic SMT placement machine, it can be mounted various of component through a vacuum nozzle, it is currently on the market cost-effective automatic placement equipment. The machine is suitable for most of the
Electronics Forum | Tue Jun 15 13:36:30 EDT 2004 | John S
We are launching a new product and are fairly new to reflow soldering. A concern that has arisen is a fairly consistent solder ball that forms at an electrolytic capacitor. We changed to a homebase aperture design on our passives to eliminate mid-c
Electronics Forum | Wed Apr 22 21:21:06 EDT 2015 | comatose
We see this from time to time. Usually, one of the leads of an electrolytic is attached to a ground plane, and the other to a trace. The ground plane acts as a big heat sink and reflows significantly later than the trace. If you have glue in your li
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Electronic Components, Parts and Their Function
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SMT Dictionary – Surface Mount Technology Acronym and Abbreviation
Technical Library | 2021-09-29 13:35:21.0
In PCB circuit assemblies the trend is moving to more SMD components with finer pitch connections. The majority of the assemblies still have a small amount of through hole (THT) components. Some of them can't withstand high reflow temperatures, while others are there because of their mechanical robustness. In automotive applications these THT components are also present. Many products for cars, including steering units, radio and navigation, and air compressors also use THT technology to connect board-to-board, PCB's to metal shields or housings out of plastic or even aluminium. This is not a simple 2D plain soldering technology, as it requires handling, efficient thermal heating and handling of heavy (up to 10 kg) parts. Soldering technology becomes more 3D where connections have to be made on different levels. For this technology robots using solder wire fail because of the spattering of the flux in the wires and the long cycle time. In wave soldering using pallets the wave height is limited and pin in paste reflow is only a 2D application with space limitations. Selective soldering using dedicated plates with nozzles on the solder area is the preferred way to make these connections. All joints can be soldered in one dip resulting in short cycle times. Additional soldering on a small select nozzle can make the system even more flexible. The soldering can only be successful when there is enough thermal heat in the assembly before the solder touches the board. A forced convection preheat is a must for many applications to bring enough heat into the metal and board materials. The challenge in a dip soldering process is to get a sufficient hole fill without bridging and minimize the number of solder balls. A new cover was designed to improve the nitrogen environment. Reducing oxygen levels benefits the wetting, but increases the risk for solder balling. Previous investigations showed that solder balling can be minimized by selecting proper materials for solder resist and flux.
SMTnet Express, May 12, 2022, Subscribers: 25,588, Companies: 11,569, Users: 27,213 Electronics Manufacturing Technical Articles Filling of Microvias and Through Holes by Electrolytic Copper Plating –Current Status and Future
Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2022/06/Optimizing-Reflowed-Solder-TIM-sTIMs-Processes-for-Emerging-Heterogeneous.pdf
solder ball attach for BGA) on TIMs voiding. Fig. 8 below shows an x-ray result after sTIM reflow, then after subsequent SAC reflow (details later). Fig. 8: Reflow#1 vs. Reflow#2 – same part In the case of Heller Industries, the task was to establish the
PCB Libraries, Inc. | http://www.pcblibraries.com/Products/FPX/UserGuide/download/Footprint%20Expert%20Surface%20Mount%20Families.pdf
) 0.30 0.20 0.10 Heel (JH) 0.00 0.00 0.00 Side (JS) 0.05 0.00 ‐0.05 Round‐off factor Round off to the nearest two place decimal, i.e., 1.00, 1.01, 1.02, 1.03 Courtyard excess 0.40 0.20 0.10 Capacitor, Aluminum Electrolytic (CAPAE
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