Patent ID: 7671432

Claim:
A dynamic quantity sensor comprising: a sensor chip including a movable portion at one surface side thereof and a silicon layer at another surface side thereof, wherein the movable portion is displaced under application of a dynamic quantity and the silicon layer is separated from the movable portion by an insulator; and a circuit chip for communicating with the sensor chip, wherein the circuit chip is disposed to confront the one surface of the sensor chip through a gap portion and to cover the movable portion, and the sensor chip and the circuit chip are bonded to each other around the gap portion so that a bonding portion is formed that substantially surrounds and seals the gap portion, wherein the gap portion is sealed by sealing the sensor chip, the circuit chip and the gap bonding portion, and the movable portion is disposed within the sealed gap portion, the sensor chip and the circuit chip are sealingly wrapped by mold material, and the sensor chip and the circuit chip are sealed by soft material softer than the mold material, and the outside of the soft material is wrapped by the mold material.