Patent ID: 6436546
Filing Date: 2002-08-20
Classification: C23C,Y10T

Abstract:
Process for coating foil comprised of nickel or a nickel alloy, by sputtering a film of a metal compound onto the foil in a vacuum in the area of at least one side of the foil, whereinthe foil is treated in an argon plasma at a pressure of 10âˆ’3 to 10âˆ’2 mbar, for an adjustable time and with an adjustable rate and energy of the ions of the plasma, a chromium oxide film is sputtered on by reactive magnetron sputtering of at least one target made from chromium or a chromium-containing alloy using at least one sputtering source in an argon-oxygen mixture at a pressure of 10âˆ’3 to 10âˆ’2 mbar, the operating point being kept constant within defined limits, the foil is connected in defined thermal contact to a heat buffer during the coating, and the coating of the foil continues until a predetermined interference colour with an interference of the first or second order is reached.