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....

  • Download Cleaning No-Clean Fluxes Prior to Conformal Coating article
  • To read this article you need to have Adobe PDF installed

You must be a registered user to talk back to us.

 
Company Information:

ACI Technologies, Inc.

ACI, an authorized IPC Training Center operating the National Electronics Manufacturing Center of Excellence providing analytical testing, manufacturing and repair services to the electronics industry.

Philadelphia, Pennsylvania, USA

Consultant / Service Provider, Standards Setting / Certification, Training Provider

  • Phone 610 362 1200
  • Fax 610 362 1290

ACI Technologies, Inc. website

Company Postings:

(24) products in the catalog

(1) upcoming training course

(63) technical library articles

(2) news releases

  • Apr 19, 2022 - Scalable Reliability for Consumer Electronics | HZO, Inc.
  • Apr 19, 2022 - Protective Coatings for Non-Invasive Medical Devices for Real-World Reliability | HZO, Inc.
  • Apr 19, 2022 - How to Resolve Smart Meter Reliability Issues with Parylene Conformal Coating | HZO, Inc.
  • Apr 11, 2022 - iNEMI Webinar 07.07.2021 - PCB Cleaning | ZESTRON Americas
  • Jan 28, 2022 - Open Radio Unit White Box 5G | Whizz Systems
  • Browse Technical Library »

Cleaning No-Clean Fluxes Prior to Conformal Coating article has been viewed 587 times

Eliminate premature failure from corrosion

Reflow Oven