| 摘要 |
<p>The present invention relates to an aqueous composition for and a process for etching copper and copper alloys applying said aqueous composition. The aqueous composition comprises a source for Fe 3+ ions, at least one acid, at least one triazole or tetrazole derivative, and at least one etching additive selected from N-alkylated iminodipropionic acid, salts thereof, modified polyglycol ethers and quaternary ureylene polymers. The aqueous composition is particularly useful for making of fine structures in the manufacture of printed circuit boards, IC substrates and the like.</p> |
