SOLUTION FOR FORMING BLACK OXIDE LAYER ON METAL THIN FILM, METHOD FOR FORMING BLACK OXIDE LAYER ON METAL THIN FILM OF ELECTROMAGNETIC INTERFERENCE FILTER AND METAL THIN FILM OF ELECTROMAGNETIC INTERFERENCE FILTER FORMED BY THE SAME METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a solution for forming a black oxide layer on a thin metallic film, to provide a method for forming the black oxide layer on the thin metallic film of an electromagnetic shielding filter by using the solution, and to provide an electromagnetic shielding filter with the black oxide layer formed thereby. PSOLUTION: The black oxide film is formed on the thin metallic film of the electromagnetic shielding filter by using the solution for forming the black oxide layer in a nearly planar structure, so that the black oxide layer is excellent in its characteristics including hardness, surface resistivity, and blackness. The electromagnetic shielding efficiency of the electromagnetic shielding filter is therefore improved, which leads to the improved contrast of a display with the filter. PCOPYRIGHT: (C)2006,JPO&NCIPI