Series 7100 Moisture in Gases Analyzer: detects H2O from 2-200 ppm - for corrosive or non-corrosive applications, i.e., argon, flourocarbons, helium, hydrogen, nitrogen, oxygen, chlorine, hydrogen chloride, hydrogen sulfide, phosgene, sulfur dioxide
Electronics Forum | Mon Jun 25 11:33:20 EDT 2012 | davef
The immersion silver is an active surface and readily combines with sulfur from the environment. Silver sulfide tarnishes the surface and creates doubt about the integrity of the finish at inspection. [uyemura.com/library-4.htm] Your customer's boar
Electronics Forum | Mon Jun 25 03:52:24 EDT 2012 | awtm
Our Customer had detected tarnished pad on ImAg PCBA and had conducted several SEM-EDX test at the soldermask below some of the chip resistors. High concentration of sulfur was found and it can be significantly reduced after further chemical cleaned
Industry News | 2014-09-18 17:55:32.0
SMTA China announcing that it presented awards for nine papers at the SMTA China South 2014 Conference Award Presentation Ceremony, held on Tuesday, August 26, 2014 at Shenzhen Convention & Exhibition Center in conjunction with the SMTA China Annual Award Ceremony.
Industry News | 2014-05-12 16:06:39.0
SMTA China announces that it presented awards for nine papers at the SMTA China East 2014 Conference Award Presentation Ceremony, held on Wednesday, April 23, 2014 at Shanghai World Expo Exhibition & Convention Center in conjunction with the SMTA China Annual Award Ceremony.
Technical Library | 2022-03-16 19:41:17.0
Creep corrosion occurs in electronics assemblies and it is reminiscent to electromigration but does not require electrical field to drive the reaction. Corrosive elements and moisture must be present for creep corrosion to occur. Sulfur is the most prominent element to cause creep corrosion in environments such as paper mills, rubber manufacturing, mining, cement manufacturing, waste water treatment etc., also including companies and locations nearby such industries. The main part of printed circuit board assembly (PCBA) to be affected is the PCB surface finish. Especially immersion silver is prone to creep corrosion, but it sometimes occurs in NiPd (lead frames), and to a lesser extent in ENIG and OSP surface finishes. As the use of immersion silver is increasing as PCB surface finish and electronics are more and more used in harsh environments, creep corrosion is a growing risk. In this paper we will present the driving forces and mechanisms as well as suitable tests and mitigation strategies against creep corrosion
Technical Library | 2015-07-16 17:24:23.0
Qualification of electronic hardware from a corrosion resistance standpoint has traditionally relied on stressing the hardware in a variety of environments. Before the development of tests based on mixed flowing gas (MFG), hardware was typically exposed to temperature-humidity cycling. In the pre-1980s era, component feature sizes were relatively large. Corrosion, while it did occur, did not in general degrade reliability. There were rare instances of the data center environments releasing corrosive gases and corroding hardware. One that got a lot of publicity was the corrosion by sulfur-bearing gases given off by data center carpeting. More often, corrosion was due to corrosive flux residues left on as-manufactured printed circuit boards (PCBs) that led to ion migration induced electrical shorting. Ion migration induced failures also occurred inside the PCBs due to poor laminate quality and moisture trapped in the laminate layers.
Events Calendar | Tue Feb 18 00:00:00 EST 2020 - Tue Feb 18 00:00:00 EST 2020 | ,
Corrosion Testing For Electronic Equipment
SMTnet Express, July 16, 2015, Subscribers: 23,036, Members: Companies: 14,463, Users: 38,550 Testing Printed Circuit Boards for Creep Corrosion in Flowers of Sulfur Chamber iNEMI (International Electronics Manufacturing Initiative) Qualification
SMTnet Express, March 17, 2022, Subscribers: 25,805, Companies: 11,547, Users: 27,113 Creep Corrosion On Lead-Free Printed Circuit Boards In High Sulfur Environments The material and process changes required to eliminate lead from
Surface Mount Technology Association (SMTA) | https://www.smta.org/smtai/best_papers.cfm
Optical Highspeed Imaging" 2007: Randy Schueller, Dell "Creep Corrosion on Lead-Free Printed Circuit Boards in High Sulfur Environments" 2006
