Patent ID: 11901564
Assignee: nan
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. The method as defined in claim 4, wherein said total porosification time is between 30 minutes and 360 minutes; said applied etching pulses have a pulse duration of about 0.05 seconds; said etching current density is between 10 mA/cm2 and 30 mA/cm2; said passivation pulse duration is between 0.1 seconds and 0.2 seconds; said passivation current density is between 30 mA/cm2 and 60 mA/cm2; said concentration of a chemical etching solution is between 0.92 M and 1.53 M of hydrofluoric acid; and said dipping time is between more than 1 seconds and 30 seconds.