Patent ID: 7533570

Claim:
An electrostatic-capacitance-type acceleration sensor comprising: a substrate including an acceleration detector having a movable part for detecting an acceleration; a bonding frame fixed on the substrate so as to surround the acceleration detector; a cap provided on the substrate, a face of the cap opposed to the substrate being constituted by a peripheral region affixed to the bonding frame, and in addition to the peripheral region, a central region; and a conductive shielding film formed at least on an entire surface of the central region of the cap, the shielding film electrically connected to the movable part, wherein a void is formed between the bonding frame, the cap, and the conductive shielding film such that a part of the bonding frame forms a first wall of the void, a part of the cap forms a second wall of the void, and a part of the conductive shielding film forms a third wall of the void, the cap and the bonding frame being joined at mutually extending portions between the void and exterior sides of the cap and the bonding frame.