No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

finishing.com -- The Home Page of the Finishing Industry

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Causes of solder tombstoning effect?

I have this query for advise regarding case of tombstoning effect during mounting assembly process. (But this has nothing to do with your product.) As we all know several and major reasons for tombstoning effect will be solder may wet at 1 terminal more quickly than the other because of differences in heat capacity, or the other termination may be more solderable than the other, or due to faulty solder paste application, or due to faulty chip placement. But for the 2 scenarios below, please advise if these may be possible causes of tombstone:

Scenario 1) What if the other termination is plated much thicker than the other termination. Would this cause tombstoning effect?
Scenario 2) Or what if the terminations were beyond the specified termination thickness, would this also cause tombstoning effect?

Jacqueline Abelarde
automotive - Manila, Philippines
2006

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: