Patent ID: 7716984

Claim:
An acceleration sensor device comprising: an acceleration sensor chip comprising: a mass portion in a center of the acceleration sensor chip; a support frame spaced a distance from and surrounding the mass portion; a plurality of flexible arms bridging a top surface of the mass portion and a top surface of the support frame; and piezo-resistors, which measure each axial component of acceleration, said piezo-resistors being formed adjacent to the mass portion and adjacent to the support frame on a top surface of each of the plurality of flexible arms; an upper regulation plate made of a silicon substrate, said silicon substrate having an IC circuit and processing circuit terminals formed on a top surface thereof, wherein the upper regulation plate is disposed at a predetermined gap from the top surface of the mass portion to cover a top surface of the acceleration sensor chip, and wherein the upper regulation plate is bonded to the support frame by adhesive; and a protection case, which houses the acceleration sensor chip with the upper regulation plate disposed on the top surface of the acceleration sensor chip, wherein the support frame has a terminal board on a side top surface of the support frame protruding from a side of the upper regulation plate, wherein the terminal board has a plurality of terminals, which are connected by lead wires to both the piezo-resistors and to the processing circuit terminals on the upper regulation plate, and wherein the upper regulation plate is larger than a periphery of the support frame, and protrudes beyond all outside walls of the support frame except an outside wall on which the terminal board is located at the side top surface thereof and covers the support frame.