Patent ID: 9334161
Filing Date: 2016-05-10
CPC Classification: B81C,C09K,C23G,H01L

Claim Text:
1. A method for producing a fine metal structure, comprising: wet etching or dry etching, rinsing contamination formed after said wet etching or dry etching, subsequently rinsing with a processing liquid, rinsing with pure water after rinsing with said processing liquid, and drying immediately after said rinsing with pure water, wherein the processing liquid comprises at least one compound selected from the group consisting of: an imidazolium halide comprising an alkyl group containing 12, 14, or 16 carbon atoms; a pyridinium halide comprising an alkyl group containing 14 or 16 carbon atoms; a betaine comprising an alkyl group containing 12, 14, or 16 carbon atoms; and an amine oxide comprising an alkyl group containing 14, 16, or 18 carbon atoms, wherein a content of said at least one compound in the processing liquid is from 10 ppm to 10% by mass.