Surgeon grade rework and repair, by the book and guaranteed. ®
Newsletter | Contact Us
Phone: 978-374-5000
  

2.4.2 Coating Replacement, Conformal Coating, Encapsulant

  • This method is used to replace conformal coatings and encapsulants on circuit boards.
  • Apply tape to outline the area where the coating will be applied. Apply the replacement coating to the board surface using a brush or foam swab.
  • Coating replacement completed.
Outline
This method is used to replace conformal coatings and encapsulants on circuit boards.

Minimum Skill Level - Intermediate
Recommended for technicians with skills in basic soldering and component rework, but may be inexperienced in general repair/rework procedures.

Conformance Level - High
This procedure most closely duplicates the physical characteristics of the original, and most probably complies with all the functional, environmental and serviceability factors.

Acceptability References
IPC-A-600 2.0 Externally Observable Characteristics
IPC-A-610 10.0 Laminate Conditions
Procedure References
1.0 Foreword
2.1 Handling Electronic Assemblies
2.2 Cleaning
2.3.1 Coating Removal, Identification Of Coatings
2.4.1 Coating Replacement, Solder Mask
2.5 Baking and Preheating
2.7 Epoxy Mixing and Handling
IPC7721 2.4.2 Coating Replacement, Conformal Coatings/Encapsulants
Tools and Materials
CircuitMedic Part
Alcohol Swab
Self-saturating Isopropyl alcohol swab. Squeeze handle to release alcohol.
CircuitMedic Part
Cleaning Brushes
Disposable brushes for use with solvents for cleaning and application of coatings.
CircuitMedic Part
Circuit Bond Packs
Clear, superior strength epoxy in two-compartment plastic packages
CircuitMedic Part
Foam Swab
Ideal for absorbing cleaning solvents, and applying color agents and epoxies.
Images and Figures
2.4.2 Coating Replacement, Conformal Coating, Encapsulant
Conformal Coating Required At Outlined Area
2.4.2 Coating Replacement, Conformal Coating, Encapsulant
Figure 1: For large surfaces, apply the replacement coating with a foam swab to create a texture.
2.4.2 Coating Replacement, Conformal Coating, Encapsulant
Figure 2: Coating complete.

Procedure
  1. Clean the area.

    Caution
    Surfaces to be coated must be thoroughly cleaned prior to coating to ensure adequate adhesion, minimized corrosion, and optimized electrical properties.
  2. If needed, apply High Temperature Tape to outline the area where the coating will be applied.
  3. If required, bake the circuit board prior to the application of the replacement coating.
  4. Mix the replacement coating.
  5. Apply the replacement coating to the board surface as required. A brush or foam swab may be used to apply and spread the replacement coating. (See Figure 1)
  6. Cure the epoxy per Procedure 2.7 Epoxy Mixing and Handling.

    Caution
    Some components may be sensitive to high temperature.
Evaluation
  1. Visual examination for texture, color match, adhesion and coverage.
  2. Electrical tests to conductors around the repaired area as applicable.
Procedure for reference only.
 

Related Products

115-1322 Circuit Bond Kit
Kit containing packages of clear, low viscosity, superior strength epoxy for circuit board damage repair.
Color Agents
One part, air-drying, semi-paste ink for printing on hard surfaces and used to tint the color of epoxy.
Customer Comments
"Circuit Technology Center is the first repair and rework company that has been able to get our boards right the first time. Your hassle-free process has helped my own company stay on track. Thanks so much."
P.B. Dublin GA, USA
The Toughest Component Rework?
The Toughest Component Rework?
Rework of surface mount and through hole components can be a challenge. Our techs are ready to tackle your toughest rework projects.
Learn more ...
Challenging Surface Mount Pad Repair
Challenging Surface Mount Pad Repair
Surface mount and BGA pad repair are routine operations at Circuit Technology Center. Learn how it's done with absolute precision and reliably.
Learn more ...
BGA Component Rework Simplified
BGA Component Rework Simplified
When you have tough BGA rework, where do you turn to? Discover the nation's #1 contractor for outsourced BGA rework, repair and reballing.
Learn more ...
Can You Repair a Broken Corner?
Can You Repair a Broken Corner?
What happens to an assembled circuit board with a broken corner? Can it be repaired reliably? It can if you have the training and the experience.
Learn more ...
ipc-logo Circuit Technology Center has been an IPC member since 1986
circuitmedic-logo
First-aid Kits for Circuit Boards ®
About Us | Base Board Repair | BGA Reballing | BGA Rework | Coating/Marking | Circuit Repair | Component Salvage | Conflict Minerals | Contact Us | Copyright/Disclaimer | Directions | ECO/Modification | Feature Articles | Frequent Questions | Gold Contacts | Intranet | Inspection | Order Tracking | Newsletter | Plated Hole Repair | Prices, Terms, Delivery | Products | Privacy | REACH | RoHS | Services | SMT/BGA Repair | SMT/PTH Rework | Sitemap

Circuit Technology Center, Inc.
22 Parkridge Road
Haverhill, MA 01835 USA
Copyright © Circuit Technology Center, Inc.. All rights reserved.