Patent ID: 7534687
Filing Date: 2009-05-19
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising: (a) forming a first semiconductor layer on the semiconductor substrate in a transistor forming region; (b) forming a groove portion in the first semiconductor layer so as to expose a surface of the semiconductor substrate by etching and removing a portion sandwiched between a source forming region and a drain forming region of the first semiconductor layer; (c) forming a second semiconductor layer having a smaller etching selectivity than the first semiconductor layer on the semiconductor substrate in the transistor forming region, so as an inside of the groove portion being embedded and the first semiconductor layer being coated thereon; (d) forming a hollow portion under the second semiconductor layer by etching and removing the first semiconductor layer under the second semiconductor layer from an outside of the transistor forming region; and (e) blocking an aperture plane of the hollow portion with a predetermined member, leaving the hollow portion under the second semiconductor layer.