Surgeon grade rework and repair, by the book and guaranteed. ®
Newsletter | Contact Us
Phone: 978-374-5000
  
Converting Tin/Lead BGA Pads to Gold Plated More Features

Converting Tin/Lead BGA Pads to Gold Plated
image 1: Solder covered BGA pads after component removal.
When engineers are developing or upgrading products, the focus of their manipulations can often involve a BGA device.

We commonly receive requests to dismantle a socketed BGA and place the BGA component directly on the circuit board surface. We also receive requests to migrate a soldered component into a socket arrangement.

The challenge with a rework that involves the removal of a soldered BGA to install a socket in it's place is that most often the pads on the circuit board surface will need to be gold plated. In this case all 1000+ pads needed to be gold plated. That, my friends, is a piece of work.

In Image 1 you see the soldered pads were the BGA component was originally located.

In order to reliably plate any conductive surface you must establish an electrical connection. How do you make an electrical connection to 1000+ pads? How do you prevent the stripping and plating chemicals from contaminating the circuit board? 

Converting Tin/Lead BGA Pads to Gold Plated
Image 2: Solder removed and pads plated with gold.
For this rework project the BGA pads were all connected to plated through hole vias, and each via connected through to the opposite side of the circuit board. 

The rework procedure follows. First a dis-solvable conductive ink was applied to the underside of the board covering all the required BGA vias. The ink was then cured.

A buss wire was connected to the conductive ink area and the opposite end of the buss wire was connected to the cathode of the plating unit. Plating tape and removable, non-permanent mask were used to isolate the plating surface and to provide a pathway for the excess plating solutions.

The solder stripping and plating steps were the easiest part of this rework. Preparation and clean-up are the steps that require the most care, and the most time. Once the gold plating was completed and the area was given a very thorough inspection,  the dis-solvable conductive ink and plating tape were removed.

Image 2 shows the completed and gold plated 1000+ pads. Easy as 123456789 ...

Several members of the Circuit Technology Center team contributed to this feature story.
Customer Comments
"We had never considered sending our rework projects until recently. The cost savings since we started using Circuit Technology Center has been significant. I hope we never have such a massive rework project again, but if we, do you'll be the first to get a call"
N.C. Fort Wayne, IN 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.