Lead Free SMT Reflow Oven XMR-1000D Product features: ▶fully meet all kinds of lead-free welding process requirements. ▶WindowsXP operating system, English and Chinese interface, easy to learn operation; Standard air furnace, patented hot air system
New Equipment | Solder Materials
Proposal Pro Contra Vaporphase OT2 SCAN-Ge XF3+ Large melting range Anti-Tombstoning Dull solder joints
Electronics Forum | Tue Jul 19 18:40:41 EDT 2022 | emeto
Nitrogen is helping voids, so if you have specific parts that are prone to voids, you might start seeing more voids. Joints will probably look a little dull in comparison and this might affect your existing AOI programs.
Electronics Forum | Wed Jun 14 08:08:56 EDT 2000 | Wolfgang Busko
Hi ji tae, we had a similar problem with QFPs 0,5 pitch processed by one subcontractor. The symptoms we noticed were: - the solderjointshape and wetting looked normal - the surface had a dull gray appearance - by pushing a lead sideways with a tweez
Used SMT Equipment | Soldering - Selective
Vitronics Soltec mySelective 6745 Selective Solder Model: mySelective 6745 Vintage: 2010 Details: Lead Free Solder Pot 400 VAC 10 kVA 410mm x 410mm Standard Gripper Preheater with 9 Elements Pressurized Flux System Solder
Industry News | 2018-10-18 08:00:40.0
SMT solder joint quality and appearance inspection process
Industry News | 2018-10-18 08:01:00.0
SMT solder joint quality and appearance inspection process
Technical Library | 2007-08-16 13:34:31.0
While experienced inspectors may be able to determine the aesthetic differences between a lead-free PCB assembly and a tin-lead version, one cannot rely on the "experienced eye". "Less wetting out to the pad edges" (Figure A) and "graininess and lack of shininess of the solder joint" (Figure B) are typical comments about some lead-free solder joints. However, in cases where a Nitrogen atmosphere was present during the reflow of the solder joint (Figure C), there will be little visual differences between the lead free alloys and their tin-lead counterparts.
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.
· What is the difference between SMT vacuum reflow soldering machine and ordinary reflow soldering machine? · What problems can be solved by smt vacuum reflow soldering machine? · What is the basic principle of vacuum reflow machine? · Ho
To see more about the Jade MKII Single Point Selective Soldering System visit Pillarhouse USA at: https://www.pillarhouse.co.uk/products/selective-soldering-handload/jade-mkii-handload Entry-level, single point selective soldering system Designed t
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/select/technologies-or-options/nitrogen-generators
. Inerting with nitrogen improves joint integrity by reducing pitting, voids and discoloration in the solder. Nitrogen also improves machine performance and reduces solder dross build-up
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