Patent ID: 6521966
Filing Date: 2003-02-18
Classification: G01L,H01L

Abstract:
A semiconductor strain sensor comprising:a sensor element for being strained in response to an application of an external force thereto and for outputting an electric signal in response to a strain thereof, the sensor element further including a pressure reference chamber therein, the pressure reference chamber having an internal volume that is maintained at a constant pressure; a lead frame having one surface for mounting the sensor element, another surface opposite the one surface and a lead portion that outputs the electric signal output from the sensor element; a package member for supporting the lead frame, and having a space portion on a side of the another surface of the lead frame the space portion being formed so that at least an area in the another surface of the lead frame is non-contacted with the package member at the space portion; and wiring for connecting the lead portion of the lead frame and the sensor element; wherein the sensor element separates from the package member with predetermined distance without the package member on the side of the one surface of the lead frame in a direction parallel to the lead frame.