Patent ID: 6591678
Filing Date: 2003-07-15
Classification: B60R,B81B,G01C,G01P

Abstract:
A dynamic quantity sensor comprising:a substrate; a movable electrode which is connected to said substrate so as to be movable in response to a dynamic quantity applied thereto in a first direction and a second direction which are mutually perpendicular on a plane parallel to said substrate; a first fixed electrode which is supported by said substrate and disposed so that a first variable capacitor for detecting displacement of said movable electrode in said first direction is formed between said movable electrode and said first fixed electrode; and a second fixed electrode which is supported by said substrate and disposed so that a second variable capacitor for detecting displacement of said movable electrode in said second direction is formed between said movable electrode and said second fixed electrode, wherein said movable electrode comprises a mass portion which includes two rod portions which cross each other in an X-shaped configuration, and an electrode portion projecting from a center of said mass portion, wherein said first fixed electrode is arranged opposite to said electrode portion so that said first variable capacitor is formed between said electrode portion and said first fixed electrode, and wherein said second fixed electrode is arranged opposite to said electrode portion so that said second variable capacitor is formed between said electrode portion and said second fixed electrode.