C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
117/75
C23C 16/02 (2006.01) C23C 18/22 (2006.01) H05K 3/00 (2006.01) H05K 3/38 (2006.01) H05K 3/18 (2006.01)
Patent
CA 1228513
ABSTRACT OF THE DISCLOSURE An improved alkaline permanganate composition for etching printed circuit boards is provided by incorporating a secondary oxidant in the solution capable of oxidizing manganate ion to permanganate ion.
481605
Courduvelis Constantine I.
Del Gobbo Anthony R.
Enthone Incorporated
Ridout & Maybee Llp
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