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EN on NiCr
I am being asked to electrolessly plate Ni on a NiCr sputtered alloy. I have tried an 30% HCl dip to strip off the native oxide but the EN won't initiate. The features are small, 3 µm openings through a spun on resist pattern. I have also tried a buffered HF solution
(10:1) to expose the Ni in the NiCr alloy but to no avail.
Indigo Systems - Santa Barbara, California
(1) Reverse etching in sulfuric acid for 60s,switch polarity and
(2) Direct etching for 30s
(3) Reverse for 30s
(4) Direct for 10s.
If you have Nickel strike, plate 2-3 min. rinse and put in EN
Reverse mean parts is connected to positive pol on rectifier
Ted Mooney, P.E.
finishing.com - Pine Beach, New Jersey
Striving to live Aloha
- Vancouver, BC, Canada
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