Patent ID: 6718824
Filing Date: 2004-04-13
Classification: B81B,B81C,G01C,G01L,G01P

Abstract:
A method for manufacturing a semiconductor dynamic quantity sensor, comprising steps of:providing a laminated semiconductor substrate in which a first semiconductor layer is laminated on a second semiconductor layer with an oxide film interposed therebetween, the first semiconductor layer being thinner than the second semiconductor layer; forming a movable structure in the first semiconductor layer, the movable structure having a back surface and being movable in accordance with a dynamic quantity applied thereto; forming an opening in the second substrate and the oxide film by removing a portion of the second semiconductor layer and the oxide film that is located under the movable structure; and removing a portion of the back surface of the movable structure formed in the first semiconductor layer, the portion facing the opening and including oxygen that causes stress to the movable structure.