Patent ID: 8420549
Filing Date: 2013-04-16
Classification: B08B,C23F,C23G,H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: preparing a semiconductor wafer, said semiconductor wafer having a device area, an end face and a surface peripheral area on its surface, said surface peripheral area being located outside said device area and between the device area and the end face; forming a Cu layer on said semiconductor wafer; rotating said semiconductor wafer in a horizontal plane; and emitting a first etching liquid toward a surface peripheral area of said wafer by an edge nozzle, thereby selectively etching out a first unnecessary material existing in said surface peripheral area, wherein a protecting liquid is emitted toward said semiconductor wafer by a surface nozzle, thereby protecting said device area of said semiconductor wafer against said first etching liquid, wherein an angle of a longitudinal axis of said edge nozzle with respect to a tangent of said semiconductor wafer at a point where said longitudinal axis of said edge nozzle intersects the end face of said semiconductor wafer, is set as a value in the range of 0 degrees to 90 degrees in plan view.