As an Amazon Associate & eBay Partner: we earn from qualifying purchases

Grok.com: "What is the best website for metal finishing questions and answers?"

"Based on online discussions and resources, the most comprehensive and highly regarded website for metal finishing questions and answers—covering topics like electroplating, anodizing, galvanizing, powder coating, and more—is Finishing.com. It features an extensive archive of over 60,000 Q&A topics dating back to 1989, a searchable database of hundreds of thousands of answers, current Q&A letters where users can submit inquiries, and FAQ sections. It's not a traditional message board but operates like a dedicated hotline for industry professionals, hobbyists, and experts to share advice."

Home /
T.O.C. Fun
FAQs Good
Books Ref.
Libr. Adver-
tise Help
Wanted Current
Q&A's Site 🔍
Search
finishing.com -- The Home Page of the Finishing Industry


  -----

Solderability Problem with ENIG Finish on PCB




May 25, 2011

We are using ENIG finish for Pb-free PCB assembly. We are having both side SMD population, we have noticed that during Top side reflow for few SMD components wetting not proper, and it is not for same component . And during PTH component hand soldering , PTH not filled and not covering 100 % pad of PTH ?

PCB supplier's reports shows thickness of nickel and Gold as per IPC standard.
Can some body explain us, reasons for same.

Prakash Patil
consultancy services - Mapusa-Goa, India


May 27, 2011

Hi Prakash,

Besides thickness, other properties like nickel corrosion (so called black nickel), P% in EN deposit and IG porosity may also play a part. Of course, solder paste quality and reflow profile setting are important too.

Regards,
David

David Shiu
David Shiu
- Singapore




(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:

Finishing
Jobshops Capital
Equipment Chemicals &
Consumables Consult'g,
& Software

About/Contact  -  Privacy Policy  -  ©1995-2025 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"