Etchant and process of etching with the same

Details Etchant and process of etching with the same Etchant and process of etching with the same

1977-09-30

1978-12-19

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156656, 156666, 156902, 252 792, 427 96, C23F 102

Patent

active

041304543

ABSTRACT:
This invention is directed to an etchant and to a process for its use. The etchant comprises a synergistic combination of hydrogen peroxide and molybdenum as oxidants in acidic solution. The combination of oxidants provides for sustained etching at an exalted rate. The etchant is useful for etching metals, especially copper and its alloys, and is particularly useful in the manufacture of printed circuit boards.

REFERENCES:
patent: 2377593 (1945-06-01), Vande Bunte
patent: 2441300 (1948-05-01), Vande Bunte

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