Patent ID: 6938486
Filing Date: 2005-09-06
Classification: B81B,C07C,G01C,G01P,Y10T

Abstract:
1. A rotational angular velocity sensor comprising: a substrate; a weight being located above said substrate and movably disposed via at least one beam; a first electrode connected to said weight, wherein the weight, the beam and the first electrode are formed of a common semiconductor material; a second electrode facing said first electrode via insulation to form capacitance between the second and first electrodes, wherein the second electrode is formed of the same semiconductor material as that of the first electrode; and wherein said first electrode and said second electrode are arranged in a first direction and in parallel with the surface of said substrate, the widths of the first and second electrodes extend in a second direction which is in parallel with the surface of said substrate and perpendicular to said first direction, and said first electrode is movable in said second direction, the movement of said first electrode induces change in said capacitance, the change thereof corresponds to a rotational angular velocity to be detected.