Patent ID: 7745345
Filing Date: 2010-06-29
Classification: H01L

Abstract:
1. A manufacturing method for a ZnO based semiconductor device, the method comprising: preparing a ZnO based semiconductor wafer including a ZnO based semiconductor substrate having a wurzeit structure with a +C plane on one surface and a −C plane on an opposite surface, a first ZnO based semiconductor layer having a first conductivity type epitaxially grown above the +C plane of said ZnO based semiconductor substrate, and a second ZnO based semiconductor layer having a second conductivity type opposite to said first conductivity type epitaxially grown above said first semiconductor layer; and wet-etching said ZnO based semiconductor wafer with acid etching liquid to etch the −C plane of said ZnO based semiconductor substrate, with a +C plane of said ZnO based semiconductor wafer exposed to said acid etching liquid.