iNEMI Project Forming to Develop a Conformal Coating Evaluation Test


Reading time ( words)

Electronic hardware can be susceptible to corrosion and electrochemical migration-related failures in geographies with high concentrations of gaseous and particulate contamination. In these environments, conformal coating may be necessary to prevent corrosion of PCBs and the components mounted on them.

Conformal coatings are presently tested by determining the time to failure of conformally coated surface-mounted resistors. This test methodology does have disadvantages. For example, the testing environment is not representative of operating conditions — it is done at a very high temperature that may cause reliable parts to be rejected, plus the test environment has no humidity and no gas other than sulfur. Another disadvantage is the time required to test. Tests can take months to complete, which is too long to be practical.

Purpose of Project

iNEMI is launching a project to evaluate and develop a more efficient and effective conformal coating screening test that will be able to determine whether a conformal coating material — and the process used to apply it — will be able to provide the required protection from harsh environment stressors. Having a better qualification process will speed the introduction of new coatings and improved application processes.

The project plans to leverage iNEMI’s flower-of-sulfur (FoS) chamber, which proved to be very successful in predicting the occurrence of creep corrosion in similar environments. The test will be based on quantitative measurement of diffusion of corrosive gases and moisture through the conformal coatings as a function of temperature and humidity in an environment containing sulfur and chlorines gases.

Business Impact

Today, it takes many months to evaluate and qualify a conformal coating, and test conditions do not accurately represent operating conditions. The ability to evaluate and qualify conformal coatings by a test of less than one-week duration, under environmental conditions approximating the operating conditions, will greatly aid the industry by reducing the qualification test time. Quantitative measurement can help optimize the conformal coating parameters (e.g. thickness, type) to ensure product reliability.

Webinars Scheduled

If you are interested in learning more about the Conformal Coating Evaluation for Improved Environmental Protection project, join us for one of our information webinars, which are open to both members and non-members:

Session 1: The Americas and EMEA
Monday, March 25, 2019
11:00 a.m. EDT (North America) / 16:00 CET (Central Europe)
Register for Session 1

Session 2: APAC
Wednesday, March 27, 2019
9:00 a.m. CST (China) / 10:00 a.m. JST (Japan)
Register for Session 2

Share

Print


Suggested Items

Mentor and Seica Partner for Data Prep and Testing Big Boards

01/18/2019 | Pete Starkey, I-Connect007
Mark Laing, business development manager of the Valor division at Mentor, a Siemens company, and Luca Corli, director of sales at Seica, speaks with I-Connect007 Technical Editor Pete Starkey about the partnership between their two companies, which enables efficient data preparation for testing big boards, and accelerates new product introduction (NPI) cycles.

Solder Paste Selection/Qualification

01/16/2019 | Stephen Las Marias, I-Connect007
In a recent SMT007 survey, we asked the following question: " What are your challenges when it comes to solder paste selection/qualification?" Here are just a few of the replies, slightly edited for clarity.

AOI Programs with a Magic Click

12/12/2018 | Jens Kokott and Matthias Muller, Goepel electronic
Production runs of 10–1,000 assemblies are everyday life for an EMS provider. But what if important staff are on vacation, and component deliveries are very much delayed? And then the customer is determined to have AOI, but the layout of the assembly is highly customized, making it virtually impossible to use complete library entries. Here's how AOI programs can help you in these scenarios.



Copyright © 2019 I-Connect007. All rights reserved.