Patent ID: 6124039
Filing Date: 2000-09-26
Classification: C22C,C22F,C23C,H01L,Y02E,Y10T

Abstract:
A coating substrate for thin-film coatings used in manufacturing electronic components, said coating substrate comprising a rolled product of one of aluminum and aluminum alloy, the substrate having a surface to be coated which exhibits local irregularities formed as one of small holes, small-grained elements and needle shaped elements, all local irregularities on the substrate surface to be coated having a maximum extension, measured vertically to the substrate surface, of less than 10 .mu.m and more than 0.1 .mu.m are formed so that flanks of the local irregularities are exposable completely to material deposition impinging on the substrate surface in a perpendicular manner, the maximum extension of each local irregularity, measured parallel to the substrate surface, is at least equal to a corresponding extension in a vertical direction, thereby avoiding defects in the electronic components.