|
Sponsor
|
|
Circuitnet Advertising Delivers Results!
Introduce your technology, new products or services in our daily e-mail newsletter & website to see how a digital advertising campaign can deliver results. Reach over 200,000 professionals.
Circuitnet LLC
|
|
|
Sponsor
|
|
iX7059 Series by Viscom: Inline X-ray Inspection Power
High-performance Inline X-ray Inspection Systems for complex electronics, semiconductors, and power modules up to 200 kg. Seamless integration, AI-powered accuracy, and maximum reliability for every application.
Viscom
|
|
| Ask the Experts |
|
QUESTIONS
SUBMIT
MEMBERS
JOIN
|
November 26, 2012 - Updated
November 13, 2012 - Originally Posted
Solder Joint Strength
Which surface finish provides the best solder joint bond strength for a leaded assembly, HASL or ENIG? Is there enough of a difference in strength to make either a better choice for a high-vibration military application?
E.H.
|
| Expert Panel Responses |
Whensoldering to ENIG, you are bonding to a nickel surface and forming a nickel-tinintermetallic. With HASL, the intermetallic is formed to a copper surfaceresulting in a copper-tin intermetallic. The copper-tin intermetallic istypically more robust than the nickel-tin intermetallic. Therefore, froma solder bond perspective, you would expect to have a more reliable solderjoint on the HASL surface. However, there are many other things toconsider. For example, the planarity of the HASL surface is not as goodas ENIG. That can result in poorer printed paste transferefficiency. A bad print can more than offset any gain achieved by theimproved intermetallic bond.
Tim Jensen
Product Manager, Advanced Assembly Materials, Indium Corp.
Timothy Jensen is the Product Manager for Indium Corporation's PCB Assembly Materials and has spent over a decade troubleshooting and optimizing SMT process lines. Having worked directly on hundreds of surface mount lines, and building thousands of different products, Tim understands each customer's unique requirements, and tailors Indium's products and services to meet or exceed those needs.
|
|
|
Free Newsletter Subscription
Circuitnet is built for professionals who bear the responsibility of looking ahead, imagining the future, and preparing for it.
Insert Your Email Address
|
|
Sponsor
|
|
Introducing our new Board to Board Connectors
These new Board to Board Connectors feature pitch sizes from 0.50 mm to 1.00 mm with multi-pitch and custom pitch designs available. Designed for long-life applications and robust handling.
Advanced Interconnections Corp
|
|
|
