Liquid composition used in etching copper- and titanium-containing multilayer film, etching method in which said composition is used, method for manufacturing multilayer-film wiring, and substrate
First Claim
1. A liquid composition used for etching a multilayer film comprising a layer made of copper or a compound containing copper as a primary component and a layer made of titanium or a compound containing titanium as a primary component, the liquid composition comprising:
- (A) a maleic acid ion source;
(B) a copper ion source; and
(C) a fluoride ion source,wherein the pH value is 0-7.
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Abstract
The present invention provides a liquid composition used for etching a copper- and titanium-containing multilayer film, a method for etching a copper- and titanium-containing multilayer film by using said liquid composition, a method for manufacturing multilayer-film wiring according to said etching method, and a substrate provided with multilayer-film wiring manufactured according to said manufacturing method. According to the present invention, a liquid composition comprising (A) a maleic acid ion source, (B) a copper ion source and (C) a fluoride ion source and having the pH value of 0-7 is used.
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Citations
15 Claims
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1. A liquid composition used for etching a multilayer film comprising a layer made of copper or a compound containing copper as a primary component and a layer made of titanium or a compound containing titanium as a primary component, the liquid composition comprising:
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(A) a maleic acid ion source; (B) a copper ion source; and (C) a fluoride ion source, wherein the pH value is 0-7. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification