High concentration sodium permanganate etch batch and its use in

Details High concentration sodium permanganate etch batch and its use in High concentration sodium permanganate etch batch and its use in

1985-05-31

1986-07-22

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

134 2217, 134 27, 134 29, 156644, 156645, 156668, 156902, 252 795, 252156, 427307, B44C 122, B29C 1708, C03C 1500, C03C 2506

Patent

active

046017836

ABSTRACT:
Aqueous, alkaline, liquid solutions consisting essentially of NaMnO.sub.4 and NaOH provide high etch rates for, e.g., printed circuit boards. The solutions can be used to desmear and etchback, and produce manganese residues on the surface of the board which are readily removed by acid neutralization alone.

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