Etching solutions for copper and copper alloys and etching proce

Details Etching solutions for copper and copper alloys and etching proce Etching solutions for copper and copper alloys and etching proce

1974-09-30

1976-02-17

Powell, William A.

Compositions

Etching or brightening compositions

Inorganic acid containing

156 18, C09K 1306, C23F 100

Patent

active

039390896

ABSTRACT:
This invention provides etching solutions for copper and copper alloys comprising a mixed aqueous solution of a peroxysulfate with a purine compound and a halogen compound added as the catalyst. There is also provided a process for etching copper or copper alloys with said etching solutions.

REFERENCES:
patent: 3216873 (1965-11-01), Jones
patent: 3410802 (1968-11-01), Radimer et al.
patent: 3770530 (1973-11-01), Fujimoto

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