Patent ID: 7886596

Claim:
An inertial sensor, comprising: a detection element detecting an amount of a physical quantity in a detection axis direction; a plurality of support members having flexibility and supporting nearly a center of the detection element, the plurality of support members each including first and second ends; a package substrate, mounted at an angle θ with respect to the vertical axis, housing the detection element and the plurality of support members; and a substrate including an opening portion formed therein, the first end of the plurality of support members connected at a lower surface of the substrate, the second end of the plurality of support members extending through the opening portion of the substrate above an upper surface of the substrate, wherein in a case when an X-axis is defined as an extending direction of the detection element, a Y-axis is perpendicular to the X-axis, and a Z-axis is perpendicular to the X-axis and the Y-axis, at least two of the support members are disposed symmetrically with respect to the Y-axis through the center of the detection element, wherein the detection element has a detection axis that detects an angular velocity and coincides with a direction of Z-axis that makes the angle of θ with respect to a vertical direction, and a resulting combined load of a load component in a direction of Y-axis and a load component in the direction of Z-axis includes a load component based on gravity acceleration, one of load components of the detection element in the direction of Y-axis applied to the support members disposed symmetrically with respect to the Y-axis through the center of the detection element is nearly equal to other load applied to the symmetrical support members at the other side of the Y-axis through the center of the detection element, and one of load components of the detection element in the direction of Z-axis applied to the support members disposed symmetrically with respect to the Y-axis through the center of the detection element is nearly equal to other load applied to the symmetrical support members at the other side of the Y-axis through the center of the detection element.