Patent ID: 7615832

Claim:
A sensor comprising: a semiconductor chip having a sensing portion and a first bump, wherein the first bump surrounds the sensing portion; a circuit chip having a second bump facing the first bump; and a resin film having a groove facing the sensing portion, wherein the resin film is separated from the sensing portion, wherein the semiconductor chip and the circuit chip are integrated with sandwiching the resin film therebetween, the resin film includes a first space and a second space before the first bump is bonded to the second bump, the first space faces the sensing portion, the second space is disposed on a periphery of the first space, the resin film is capable of being heated when the resin film is sandwiched between the semiconductor chip and the circuit chip, the resin film expands when the first bump is bonded to the second bump, the second space accommodates an expanded portion of the resin film, and the first space provides the groove after the first bump is bonded to the second bump.