Patent ID: 8022433

Claim:
A semiconductor sensor, comprising: a semiconductor sensor assembly comprising: a semiconductor sensor chip having a movable part and a bonding area surrounding the movable part, and a cap chip placed on at least one of a top surface and a bottom surface of the semiconductor sensor chip and having a quadrilateral base and a bonding area which is formed in a bank along a periphery of the base and is bonded to the bonding area of the semiconductor sensor chip to air-tighten the movable part of the semiconductor sensor chip; a base plate on which the semiconductor sensor assembly is fixed and held; electric wires connecting the semiconductor sensor chip to the base plate; and a resin molding the semiconductor sensor assembly on the base plate, wherein a circumference side surface of the cap chip is wet-etched, and wherein the circumference side surface is coated with an insulating protection film on a wet-etched surface of the side surface.