Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As 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

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

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: