Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

The authoritative public forum
for Metal Finishing since 1989
-----

Electroless copper for PCB (PTH)

2004

Hello:

Please answer my question: for electroplating on epoxy or PCB (ELECTRONIC BOARDS) a solution uses for electroless copper. This solution is made with tin chloride; palladium chloride; hydrochloric acid & sodium chloride. In this step a complex of tin and palladium with chloride ion covers the epoxy. After this step a solution which is made of hydrochloric acid(10%) stripping a layer of tin and palladium ion (is negative ion)unless is on it. After this step the epoxy in the solution of electroless copper is covered with copper. My question is for knowing what amounts of palladium chloride & tin chloride & sodium chloride with titration (in the chemistry) how I must to do and this work with -EDTA Na2 H2- is been?

Thanks.

K.Alipoor
student of kerman university - Shiraz, Fars, Iran

Hello Mr. Alipoor. Unfortunately, the information you are seeking is probably considered trade secret knowledge rather than generic chemistry.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2003

(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: