Stage driving device, method for manufacturing stage driving device, and imaging apparatus

A stage driving device comprising:

• a secured section;
• a movable section supported movably along a movement plane relative to the secured section;
• a driver including at least one magnet at one of the secured section and the movable section and at least one coil at the other one of the secured section and the movable section, the driver being configured to move the movable section along the movement plane;
• at least one magnetic sensor at one of the secured section and the movable section provided with the coil, the magnetic sensor being configured to detect a position of the movable section with respect to the secured section;
• and
• at least one magnetic body at the one of the secured section and the movable section provided with the coil, the magnetic body being configured to make the position of the movable section stable with respect to the secured section in a direction perpendicular to the movement plane using a magnetic force that acts between the magnetic body and the magnet,
• wherein the coil and the magnetic sensor are disposed on a flexible substrate attached to one of the movable section and the secured section, and
• wherein the magnetic body is disposed on a side of the flexible substrate close to a back surface of the coil.

A method for manufacturing a stage driving device comprising:

• providing a secured section;
• attaching a movable section to the secured section, such that the movable section is supported movably along a movement plane relative to the secured section;
• and
• attaching a driver including at least one magnet at one of the secured section and the movable section and at least one coil at the other one of the secured section and the movable section, the driver being configured to move the movable section along the movement plane,
• attaching at least one magnetic sensor and at least one magnetic body to one of the secured section and the movable section provided with the coil, the magnetic sensor being configured to detect a position of the movable section with respect to the secured section, the magnetic body being configured to make the position of the movable section stable with respect to the secured section in a direction perpendicular to the movement plane using a magnetic force that acts between the magnetic body and the magnet,
• wherein the coil is an air coil comprising an air-core portion.