HOME FAQs BOOKS JOBS: Help Wanted Suggestions you are here: Hotline/Forum => Letter 5056

Nonwet/ dewet

I am having problem with solderability, non wet and dewet. The lead frame material was alloy 42. I am new in this process and trying to figure out what is the cause of dewet or nonwet.

Below are the process :-

- lead frame was subject to high temp 435 deg C

- pre-clean and 100% tin plated ( rack)

- subject to oven burn-in at 150 deg for 84 hours.

- hot solder dip - this is where I have problem.

* Need advise on what is the possible root cause.

* What do I need to look for ?

* What sort of test that I need to do ?.<?P>

Koh Heng Lim
- Singapore

ANSWER or FOLLOW UP POST an unrelated QUESTION HOT Topics

Disclaimer: It is not possible to 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; some names may be fictitious and some recommendations may be deliberately harmful.

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