Patent ID: 9581427
Date: 2017-02-28
CPC Classifications: G01B,G01L

Claim:
1. A mechanical quantity measuring device comprising: a semiconductor chip including a front surface, a plurality of piezoresistive elements formed on the front surface side, a plurality of electrodes formed on the front surface side and electrically connected to the plurality of piezoresistive elements, and a rear surface located on an opposite side to the front surface; a lead wire unit including a plurality of wires electrically connected to the plurality of electrodes; and a plate member including a chip mount surface on which the semiconductor chip is mounted and a mount surface located on an opposite side to the chip mount surface and fixed to an object to be measured, to which the semiconductor chip is fixed via a joining member so that the rear surface of the semiconductor chip may face the chip mount surface, wherein the plate member includes a first region facing the rear surface of the semiconductor chip and second regions provided on both sides with the first region in between, and a thickness of the plate member in the first region is larger than a thickness in the second region at a peripheral edge of the plate member, wherein