ETCHING SOLUTION FOR STRUCTURE OBSERVATION OF COPPER OR COPPER ALLOY, ETCHING METHOD AND STRUCTURE OBSERVATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide an etching solution for structure observation with no special waste solution processing, usable as a micro corrosion etching solution and/or macro corrosion etching solution when observing a structure of a copper alloy with high oxidation sensitivity in which oxide formation tends to occur, high corrosion-resistant copper alloy, or high purity copper, high in safety of an ingredient, easy in handling or processing, without using special skill or expensive exclusive equipment, high in versatility, and with which a surface to be observed for clearly and easily observing a state of the structure or a crystal grain boundary is obtained.;SOLUTION: The etching solution for structure observation of copper or the copper alloy contains nitric acid, sulfuric acid, a copper sulfate salt, sodium hydroxide, and hydrogen peroxide as an initial composition for injecting into a bath.;COPYRIGHT: (C)2011,JPO&INPIT