Patent · US Expired

Method and apparatus for forming electrolytic water and apparatus for washing semiconductor substrate using electrolytic water-forming apparatus

US6723226B1 · kind B1 · utility

17Cited by
4References
8Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 12, 1996
Grant dateApr 20, 2004
Priority date
Expiry dateApr 12, 2016

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10S134/902
  • WIPO fieldEnvironmental technology
  • WIPO sectorChemistry

Abstract

In forming an electrolytic water, pure water or ultra-pure water is added to at least one solid supporting electrolyte selected from the group consisting of oxalic acid, ammonium oxalate, ammonium formate, ammonium bicarbonate, and ammonium tartrate to prepare a solution saturated with the supporting electrolyte. The solution containing the supporting electrolyte is subjected to hydrolysis to obtain an anodic water and a cathodic water.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.