Patent ID: 8137787
Filing Date: 2012-03-20
Classification: C23C,Y10T

Abstract:
1. A structure, comprising: a metallic material having a surface, the metallic surface having a surface roughness (Ra) being not more than 1.5 μm; and a chromium-oxide passivation film providing an outermost surface, said chromium oxide passivation film formed by coating directly onto the metallic material surface a chromium film having a thickness of at least 100 nm, baking the chromium film directly onto the metallic material surface at a temperature of 100° C. to 200° C. and heating the baked chromium film coated directly onto the metallic material surface in an oxidizing atmosphere, wherein, said chromium-oxide passivation film is substantially 100% chromium oxide approximately 30 nm from the outermost surface, chromium of said baked chromium film which is not oxidized remains between said chromium-oxide passivation film and said metallic material, and said chromium remains adhered to the metallic material so that said chromium-oxide passivation film is coupled to said metallic material, and said chromium-oxide passivation film has pin holes, and said pin holes are sealed.