Electronics Forum | Fri Apr 16 11:03:35 EDT 2004 | davef
Your copper corrosion is not good. It indicates that you have not done a good job in cleaning. [We assume this is a medium green color, not unlike the color of the solder mask on your board, that is almost like a translucent lacquer; rather than th
Electronics Forum | Wed Jun 17 16:08:37 EDT 1998 | upinder singh
We are facing a problem of high contamination on boards after wave soldering. We want the contamination to be under 24 ugm/inch square. We are using a no clean flux with the spray fluxer unit of wave soldering. The contamination is higher on the end
Industry News | 2012-12-03 19:52:39.0
Printed Board Assembly Cleaning and Contamination Testing Center marks its debut at IPC APEX EXPO®, February 19–21, 2013, at the San Diego Convention Center.
Industry News | 2011-07-26 21:41:43.0
Kyzen announces that Dr. Mike Bixenman hosted an informative IPC Webinar titled “Cleaning Highly Dense Circuit Assemblies and Advanced Packages” on Tuesday, July 19, 2011.
Technical Library | 1999-05-07 10:47:00.0
White residue remaining after cleaning circuit board assemblies can be caused by a variety of chemicals and reactions. Rosin and water-soluble fluxes, circuit board resins and epoxies, component materials and other contamination all contribute to this complex chemistry. This paper discusses many of the sources of the residues that seem to be an ever-increasing occurrence.
Technical Library | 2022-12-19 18:59:51.0
Material and Process Characterization studies can be used to quantify the harmful effects that might arise from solder flux and other process residues left on external surfaces after soldering. Residues present on an electronic assembly can cause unwanted electrochemical reactions leading to intermittent performance and total failure. Components with terminations that extend underneath the package can trap flux residue. These bottom terminated components are flush with the bottom of the device and can have small solderable terminations located along the perimeter sides of the package. The clearance between power and ground render high electrical forces, which can propagate electrochemical interactions when exposed to atmospheric moisture (harsh environments). The purpose of this research is to predict and understand the functional performance of residues present under single row QFN component packages. The objective of the research study is to develop and collect a set of guidelines for understanding the relationship between ionic contamination and electrical performance of a BTC component when exposed to atmospheric moisture and the trade-offs between electrical, ionic contamination levels, and cleanliness. Utilizing the knowledge gained from undertaking the testing of QFN components and associated DOE, the team will establish a reference Test Suite and Test Spec for cleanliness.
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/efd/products/dispense-tips/angled-tips
Lubrication Systems Mixers Pest Control Systems Reservoirs and Pumps Solder Paste and Flux Syringe Barrels and Cartridges Thermal Compounds (TIM) Two-Component (2k
| https://www.eptac.com/wp-content/uploads/2015/03/ecss_q_st_70_18c-space-product-assurance-rf-coax-cables.pdf
5.2.1 Solder a. The supplier shall use solder ribbon, wire and preforms, provided that the alloy and flux conform to the requirements on “material selection” of ECSS‐Q‐ST‐70‐08. NOTE 1 The following solder alloys are approved: • 60 Sn
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