Patent ID: 7242065

Claim:
A pressure sensor comprising: a sensor chip configured to sense a pressure of a fluid and generate an electrical signal representative of the sensed pressure, said sensor chip having a surface that includes a sensing area to be exposed to the fluid and a plurality of electrical contact pads that are disposed on the surface; and a circuit chip including a circuit that is configured to process the electrical signal generated by said sensor chip said circuit chip having a plurality of electrical contact pads that are disposed on a surface of said circuit chip and respectively electrically connected to the electrical contact pads of said sensor chip, wherein the surfaces of said sensor chip and said circuit chip face each other with a space formed therebetween, the sensing area of the surface of said sensor chip is to be directly exposed to the fluid which flows into the space between the surfaces of said sensor chip and said circuit chip, and all the electrical contact pads of said sensor chip and said circuit chip are interposed between the surfaces of said sensor chip and said circuit chip and hermetically sealed so as to be isolated from the fluid.