Technical Library | 2020-11-24 23:12:27.0
In a lead-free reflow process, temperatures are higher, and materials use outgasses more than in a leaded reflow process. The trends toward higher density populated boards and more pin-in-paste technology also increase solder paste use. More components and more solder paste result in more outgassing of chemistry during the reflow process. Some assemblies report condensation of vapors when the cold printed circuit board enters the oven. Little is known about the interaction between these condensed materials in terms of the interaction between these condensed materials and the reliability of the assembly. Apart from the question of reliability, a printed circuit board contaminated with a small film of residues after reflow soldering is not desirable.
Technical Library | 2017-12-11 22:31:06.0
Typical printed circuit board assemblies (PCBAs) processed by reflow, wave, or selective wave soldering were analysed for typical levels of process related residues, resulting from a specific or combination of soldering process. Typical solder flux residue distribution pattern, composition, and concentration are profiled and reported. Presence of localized flux residues were visualized using a commercial Residue RAT gel test and chemical structure was identified by FT-IR, while the concentration was measured using ion chromatography, and the electrical properties of the extracts were determined by measuring the leak current using a twin platinum electrode setup. Localized extraction of residue was carried out using a commercial C3 extraction system. Results clearly show that the amount and distribution of flux residues are a function of the soldering process, and the level can be reduced by an appropriate cleaning. Selective soldering process generates significantly higher levels of residues compared to the wave and reflow process. For conformal coated PCBAs, the contamination levels generated from the tested wave and selective soldering process are found to be enough to generate blisters under exposure to high humidity levels.
Industry News | 2010-05-11 11:32:13.0
NASHVILLE — Kyzen, a world leading provider of environmentally responsible precision cleaning products for electronics and high-technology manufacturing operations, announces that it will hold a technology day in cooperation with E-Tronics Kft. to discuss challenges in cleaning electronics.
Industry News | 2015-02-04 17:49:57.0
Vi TECHNOLOGY will participate in the PCB manufacturing processes workshop, scheduled to take place April 21-23, 2015 at the Kintner Equipment Corp. facility in Endicott, New York. ACE Production Technologies, Inc. has partnered with Kintner Equipment Corp. to conduct the free workshop.
Industry News | 2016-06-13 14:57:43.0
Kurtz Ersa North America is pleased to announce that Joseph Clure, Application / Process Engineer, will present at the Advanced Selective Soldering Process Seminar, scheduled to take place Tuesday, June 28th at Kester’s Global Headquarters in Itasca, IL.
Industry News | 2008-05-12 19:16:01.0
NASHVILLE � May 6, 2008 � Kyzen Corporation, a world leading provider of environmentally responsible precision cleaning products for electronics and high-technology manufacturing operations, announces that it will present during the Scandinavian Electronic Cleaning Seminar, scheduled to take place on May 21 and 22, 2008 at the Hotel Scandic J�rva Krog in Stockholm, Sweden.
Industry News | 2003-05-05 08:32:30.0
Nepcon UK in Brighton will host the latest in electronics materials and electronics reliability measurement equipment from Concoat.
Industry News | 2018-10-18 08:29:16.0
How to Prevent Short Circuits to Ground in QFN Components?
Industry News | 2011-07-22 23:23:08.0
Kyzen, a world leading provider of environmentally responsible precision cleaning products for electronics and high-technology manufacturing operations, announces that Dr. Mike Bixenman will present at the upcoming technical workshops titled “Cleaning Electronic Assemblies”, that will be held at two separate locations in Texas.
Industry News | 2013-07-30 13:07:07.0
Aqueous Technologies, together with its partners from Kyzen, Henkel, STI Electronics and PVA, are hosting a Cleaning and Reliability workshop on Thursday, September 12, 2013 in Duluth GA.
