Patent ID: 6623607
Filing Date: 2003-09-23
Classification: C03C,C23C

Abstract:
A method for manufacturing a substrate of at least 100Ã—100 mm, a surface of the substrate being coated with an MgO layer, the MgO layer having a selected characteristic of (XYZ) crystal orientation, the method comprising the steps of:sputtering off Mg in a first area by generating a plasma discharge between an Mg cathode sputtering target with an Mg material purity of at least 99% and an anode, in an atmosphere of said first area with a working gas; flowing said working gas out of said first area and into a second area adjacent said surface; introducing oxygen into said second area; and selecting said sputtering, said flowing and said introducing steps so that said MgO layer is deposited with a static deposition rate of at least 5 nm/sec and said MgO layer is deposited having a density of at least 85% of the density of stoichiometric MgO-bulk material, which latter is &rgr;=3.58 g/cm3.