Patent ID: 6753201
Filing Date: 2004-06-22
Classification: B81B,B81C,G01P,H01L

Abstract:
A method of manufacturing a semiconductor device having a semiconductor substrate in which an insulation layer is layered on a first semiconductor layer and a second semiconductor layer is layered on the insulation layer, and a movable section formed in the second semiconductor layer and displaceable in response to a dynamic quantity to be applied, the method comprising:preparing the semiconductor substrate; forming a trench to demarcate the movable section within the prepared semiconductor substrate so that the trench reaches the insulation layer from a surface of the second semiconductor layer; and forming the movable section by performing dry etching on the trench-formed semiconductor substrate to remove the laterally located part of the second semiconductor layer, wherein the forming of the movable section includes: charging the insulation layer located at a bottom of the trench during the performing of the dry etching to force etching ions to impinge onto part of the second semiconductor layer located laterally to the bottom of the trench, removing electric charges caused due to the charging of the insulation layer from at least one of the movable section, a region of the second semiconductor layer that faces the movable section, and a region of the insulation layer that faces the movable section, and alternately repeating the charging of the insulation layer and the removing of electric charges before the movable section is completely formed.