PLASMATREAT: Openair Plasma Process, Eliminating all Organic and Silicon-Based Contaminants Effectively Removes Electrostatically Attached Dust Applicable to Flat Surfaces as well as Complex 3D Shapes Atmospheric Plasma Process Reduces O
Our conductive silicone gaskets are constructed from silicone containing metal powder fillers which combine to produce high levels of attenuation with excellent environmental shielding and a high level of conductivity. Many types of filler, from nick
Electronics Forum | Tue Apr 19 16:20:05 EDT 2016 | davef
Don't blame it on the poor paste thickness requirement [although I might go on to argue that it's could be a contributor to the issue]. Most likely you're the problem. About 70% of the time solder on gold fingers is caused by poor cleaning of screen
Electronics Forum | Tue May 27 11:59:14 EDT 2003 | blnorman
Is anyone aware of any reports, studies, articles on the subject of silicon contamination in SnPb solder joints. We are evaluating repair of conformally coated (silicone) boards. The fear is that we will never totally remove the silicone and once i
Industry News | 2023-07-22 11:28:46.0
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Industry News | 2024-07-01 11:44:00.0
A new white paper from IPC's Chief Technologist (CTC) and Design Leadership (DLC) Councils, Better Electronics by Design: Next Generation Design Needs explores the elements of the "Design for Excellence" methodology, re-thinking how it needs to be further defined and applied in the full ecosystem of electronics design.
Technical Library | 2013-02-07 17:01:46.0
Silicone contamination is known to have a negative impact on assembly processes such as soldering, adhesive bonding, coating, and wire bonding. In particular, silicone is known to cause de-wetting of materials from surfaces and can result in adhesive failures. There are many sources for silicone contamination with common sources being mold releases or lubricants on manufacturing tools, offgassing during cure of silicone paste adhesives, and residue from pressure sensitive tape. This effort addresses silicone contamination by quantifying adhesive effects under known silicone contaminations. The first step in this effort identified an FT-IR spectroscopic detection limit for surface silicone utilizing the area under the 1263 cm-1 (Si-CH3) absorbance peak as a function of concentration (µg/cm2). The next step was to pre-contaminate surfaces with known concentrations of silicone oil and assess the effects on surface wetting and adhesion. This information will be used to establish guidelines for silicone contamination in different manufacturing areas within Harris Corporation... First published in the 2012 IPC APEX EXPO technical conference proceedings.
Technical Library | 2013-04-18 16:46:42.0
Conformal coatings are considered a method of providing corrosion protection to electrical assemblies used in high-humidity or harsh environments. They are applied to PCBs for various reasons: to protect from moisture and contamination, to minimize dendritic growth, to provide stress relief, and for insulation resistance. These contribute to more durable handling, enhanced device reliability, and reduced warranty costs. Increased miniaturization of new circuit board designs requires flexible, low stress coating material to protect delicate components and fine-pitch leads. Silicone conformal coatings offer many advantages that address the general trend of ongoing PCBs designs, such as: high flexibility and low modulus to reduce stress on delicate or small components... First published in the 2012 IPC APEX EXPO technical conference proceedings.
http://www.gpd-global.com No drip no drool across a wide range of fluid viscosities (low-to-mid and low-to-high). No manual adjustment to compensate for pump variability. Truly Volumetric PCD Pumps for total control of dispensing fluids. Ability to
A brief demonstration of the ScanCAD Precision Material Removal System for PCB Reverse Engineering
SMTnet Express February 7, 2013, Subscribers: 26168, Members: Companies: 13281, Users: 34286 Effect of Silicone Contamination on Assembly Processes Silicone contamination is known to have a negative impact on assembly processes such as soldering
| https://www.smtfactory.com/PCBA-Cleaning-Machine-PCB-Defluxing-For-Best-Coating-and-Bonding-Effect-id43566387.html
. The cleaning effect is generally not achieved through spray jet pressure, as with inline processes, but rather via the volume of cleaning medium passed over the substrates
Surface Mount Technology Association (SMTA) | https://www.smta.org/knowledge/journal.cfm
. Abstract 15-4 FATIGUE PROPERTIES OF Sn/3.5Ag/0.7Cu SOLDER JOINTS AND EFFECTS OF Pb-CONTAMINATION J. Oliver, M. Nylén, O. Rod, C. Markou Abstract 15-3 CASE STUDY: THE EFFECT OF SEVERE BLACK PAD DEFECT ON SOLDER BONDS ON BALL GRID ARRAY COMPONENTS Jodi Roepsch
