Micro-etch solution for producing metal surface topography
AssigneeMorton International, Inc.
InventorsJohn Schemenaur, Todd Johnson, Michael Marsaglia
Life of this patent
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Abstract
Metal surfaces, particularly copper surfaces, which are oxidatively micro-etched to increase surface area through the use of molybdenum. The micro-etch solutions contain a proton source, e.g., a mineral acid, an oxidizer agent, e.g., hydrogen peroxide, an azole compound, and a molybdenum source. These micro-etched surfaces can further be rendered acid-resistant by exposure to a thiazole compound and/or a thiocarbamide compound. The thiazole compound and/or thiocarbamide compound may be provided either in the oxidative micro-etching solution or provided in a post-micro-etching solution.
Claims50
An aqueous micro-etching solution comprising molybdenum ions in conjunction with an azole compound in a sufficient amount to increase surface area on a metal surface;
- a proton source;
- and an oxidizing agent.
A method of micro-etching a metal surface comprising contacting the metal surface with an aqueous molybdenum micro-etching solution for a sufficient amount of time to increase surface area on the metal surface by micro-roughening the metal surface, the aqueous molybdenum micro-etching solution comprises molybdenum ions in conjunction with an azole compound in an amount sufficient to micro-roughen the metal surface;
- a proton source;
- and an oxidizing agent.
Dependencies are inferred from the claim text.