WHY CLEAN A NO-CLEAN FLUX
Published: |
November 4, 2020 |
Author: |
Mike Bixenman, DBA [Kyzen Corporation] Mark McMeen, [STI Corporation] Bruno Tolla, Ph.D. [Kester Corporation] |
Abstract: |
Residues present on circuit boards can cause leakage currents if not controlled and monitored. How "Clean is Clean" is neither easy nor cheap to determine. Most OEMs use analytical methods to assess the risk of harmful residues. The levels that can be associated with clean or dirty are typically determined based on the exposed environment where the part will be deployed. What is acceptably clean for one segment of the industry may be unacceptable for more demanding segments. As circuit assemblies increase in density, understanding cleanliness data becomes more challenging. The risk of premature failure or improper function is typically site specific. The problem is that most do not know how to measure or define cleanliness nor can they recognize process problems related to residues. A new site specific method has been designed to run performance qualifications on boards built with specific soldering materials, reflow settings and cleaning methods. High impedance measurements are performed on break off coupons designed with components geometries used to build the assembly. The test method provides a gauge of potential contamination sources coming from the assembly process that can contribute to electrochemical migration.... |
You must be a registered user to talk back to us. |
Company Information:
More articles from KYZEN Corporation »
- Nov 10, 2021 - Stencil Cleaning - A Practical Approach To Improving Yields And Maximizing Your Throughput
- Aug 14, 2019 - Cleaning Flux Residue under Leadless Components using Objective Evidence to Determine Cleaning Performance
- Jul 27, 2017 - Electrochemical Methods to Measure the Corrosion Potential of Flux Residues
- Jul 28, 2016 - Duo-Solvent Cleaning Process Development for Removing Flux Residue from Class 3 Hardware
- Oct 23, 2014 - Combination of Spray and Soak Improves Cleaning under Bottom Terminations
- See all SMT / PCB technical articles from KYZEN Corporation »
More SMT / PCB assembly technical articles »
- Apr 11, 2022 - iNEMI Webinar 07.07.2021 - PCB Cleaning | ZESTRON Americas
- Jan 28, 2022 - Open Radio Unit White Box 5G | Whizz Systems
- Nov 10, 2021 - Understanding the Cleaning Process for Automatic Stencil Printers | ITW EAE
- Oct 20, 2021 - PCB Surface Finishes & The Cleaning Process - A Compatibility Study | ZESTRON Americas
- Oct 06, 2021 - Cleaning Before Conformal Coating | ZESTRON Americas
- Browse Technical Library »
WHY CLEAN A NO-CLEAN FLUX article has been viewed 609 times