Patent ID: 11929257
Assignee: VERSUM MATERIALS US, LLC
Field: Basic materials chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 13:
14. The etching solution of claim 1 wherein the cationic surfactant is selected from stearyltrimethylammonium chloride, cetyltrimethylammonium tosylate, octyltrimethylammonium chloride, erucyl bis-(hydroxyethyl)methylammonium chloride, erucyl trimethylammonium chloride cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, myristyltrimethylammonium chloride, myristyltrimethylammonium bromide, dodecyltrimethylammonium chloride, dodecyltrimethylammonium bromide, decyltrimethylammonium chloride, decyltrimethylammonium bromide, and mixtures thereof.