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, Design, IPC Standards Certification Center, Service Provider, Training Provider

  • Phone 610 362 1200
  • Fax 610 362 1290

ACI Technologies, Inc. website

Company Postings:

(24) products in the catalog

(76) upcoming training courses

(58) technical library articles

(3) news releases

  • May 28, 2020 - 7 Benefits of Choosing Professional PCB Manufacturers and Assemblers | Asia Pacific Circuits Co., Ltd
  • May 21, 2020 - 1CLICKSMT Conformal Coating System -- Solution for photoelectric devices assembly | 1 CLICK SMT TECHNOLOGY CO., Limited
  • Apr 29, 2020 - 1CLICKSMT Odd form Component inserting System -- Solution for security products assembly | 1 CLICK SMT TECHNOLOGY CO., Limited
  • Apr 16, 2020 - NEWS! Independent dual Z-axis selective soldering machine | 1 CLICK SMT TECHNOLOGY CO., Limited
  • Apr 14, 2020 - Reliable Selective Soldering For High Volume Assemblies | ITW EAE
  • Browse Technical Library »

Cleaning No-Clean Fluxes Prior to Conformal Coating article has been viewed 141 times

best reflow oven

selective soldering