No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Flip Chip Package Plating




Q. Hi I'm setting up to plate some flip chip packages. They are approx. 1.5 in square. They have a solder mask coating 1 mil thick and around 9000 pads/openings 4 mils in dia. for a total area of .086 square inches. I need to plate the copper pad up and over the solder mask approx 1.5 mils then do a Nickel and hard gold overcoat. I'm not a chemist so I'm looking for suggestions? I want to use a Hi-Speed copper solution with a nickel barrier coat then a Hard Gold. I'm looking at a hobby plating supplier but not sure if their plating solutions are the right quality. Can anyone point me to a supplier that can supply the chemistry and some advice? I have a small plating system with plastic 1 ltr tanks and a reciprocating arm for agitation of the part during plating.
Thanks

Fran McQuade
Engineer - Hutto, Texas
March 5, 2018

Ed. note: Sorry, this RFQ is old & outdated, so contact info is no longer available. However, if you feel that something technical should be said in reply, please post it; no public commercial suggestions please ( huh? why?)





(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:

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


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"