ENIG corrosion problem

Chlorine residue on this ENIG land caused corrosion of the underlying nickel and copper to form copper and nickel oxides on the gold surface.

Apparently the 3 – 7 micro-inches thick immersion gold layer is not always impervious to chloride migration.

Check out SEM Lab, Inc.  to learn more.

2 thoughts on “ENIG corrosion problem

  1. Our FAB doing ENIG process with nickel plating -> sintering -> repeat 3 times and then final nickel & gold plating , I don’t know why should repeat it many times and wondering if it exist an efficient way to do only 1~2 times of plating ??

    • Sorry for the delayed response. I am unfamiliar with sintering of electroless nickel during the ENIG plating process. What is the purpose of the multiple plating & sintering steps? Thanks!

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes:

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>

The reCAPTCHA verification period has expired. Please reload the page.