| http://www.w3.org/ns/prov#value | - on and a second region having different impurity concentrations and/or different impurity species, so that the first and second regions differ in the concentration of the holes or electrons, and the crystal growth is suppressed on the first region and facilitated on the second region, wherein the first region is a major part of the surface, and the second region is a minor part of the surface, and
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