Cleaning No-Clean Fluxes Prior to Conformal Coating
Published: |
March 9, 2020 |
Author: |
ACI Technologies, Inc. |
Abstract: |
A customer called the Helpline seeking advice for cleaning no-clean fluxes prior to applying a conformal coating. The customer's assemblies were manufactured with a no-clean rosin based solder paste (ROL0) and were cleaned with an isopropyl alcohol (IPA) wash. After cleaning, a white residue was sometimes found in areas with high paste concentrations and was interfering with the adhesion of the conformal coating (Figure 1). For conformal coatings to adhere properly, the printed circuit board (PCB) surface must be clean of fluxes and other residues. In addition, ionic contamination left by flux residues can lead to corrosion and dendrite growth, two common causes of electronic opens and shorts. Other residues can lead to unwanted impedance and physical interference with moving parts.... |
You must be a registered user to talk back to us. |
Company Information:
More articles from ACI Technologies, Inc. »
- Dec 07, 2020 - A Non-destructive Approach to Identify Intermittent Failure Locations on Printed Circuit Cards (PCC) that have been Temperature Cycle Tested
- Nov 09, 2020 - Ball Grid Array (BGA) Voiding Affecting Functionality
- Sep 02, 2020 - Reworking ALD Coatings
- Aug 05, 2020 - ALD of Alumina Ceramic Films for Hermetic Protection
- Jul 01, 2020 - Lead-Free Risk Mitigation -- A Case Study
- See all SMT / PCB technical articles from ACI Technologies, Inc. »
More SMT / PCB assembly technical articles »
- Aug 20, 2024 - Thermal Interface Materials Drive Electronic Innovation | GPD Global
- Aug 20, 2024 - Underfill Materials Dispensing in Electronics Manufacturing Applications | GPD Global
- Jul 15, 2024 - Transforming LED Manufacturing: I.C.T Engineers Set Up Complete Production Line in Tajikistan | I.C.T ( Dongguan ICT Technology Co., Ltd. )
- Jun 20, 2024 - Case study: Precise Coating on Electronic Hearing Devices | ASYMTEK Products | Nordson Electronics Solutions
- Mar 19, 2024 - What is Underfill | GPD Global
- Browse Technical Library »
Cleaning No-Clean Fluxes Prior to Conformal Coating article has been viewed 997 times