Patent ID: 8034674
Filing Date: 2011-10-11
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising: forming a substrate having a surface provided with a projection; forming a semiconductor film, having a thickness smaller than a height of the projection, over the surface of the substrate provided with the projection; forming a resist over a part of the semiconductor film that covers the projection and regions of the substrate adjacent to both sides of the projection; etching the semiconductor film with the resist used as a mask to form an island-like semiconductor film that covers the projection and the regions of the substrate adjacent to both sides of the projection; etching the resist to expose a part of the island-like semiconductor film that covers a top surface of the projection, wherein parts of the island-like semiconductor film located over the regions of the substrate adjacent to both sides of the projection remain covered with the resist; etching the exposed part of the island-like semiconductor film that covers the top surface of the projection to thin the exposed part of the island-like semiconductor film; removing the resist after etching the exposed part of the island-like semiconductor film; introducing impurities to portions of the island-like semiconductor film to form a source region and a drain region with a channel formation region formed therebetween, the channel formation region being located over the projection.