PRESSURE DETECTION APPARATUS

摘要

[Problem] To improve detection sensitivity of a pressure detection apparatus that has a bimorph, and a glass or other material member as a pressing surface. [Solution] In a pressure detector (110), a supporting substrate (1) has an input surface (1a) to which pressure is applied, and a rear surface (1b) having end portions thereof supported. A first piezoelectric sheet (3a) is disposed at a center part of the rear surface (1b) of the supporting substrate (1). A second piezoelectric sheet (3b) is disposed to face the first piezoelectric sheet (3a), said second piezoelectric sheet being on the first piezoelectric sheet (3a) side that is the reverse side of the supporting substrate (1). A first detection electrode (4a) is disposed on the first piezoelectric sheet (3a) side that is the reverse side of the second piezoelectric sheet (3b). A second detection electrode (4b) is disposed on the second piezoelectric sheet (3b) side that is the reverse side of the first piezoelectric sheet (3a). An intermediate adhesion layer (8) is disposed between the first piezoelectric sheet (3a) and the second piezoelectric sheet (3b). The elastic modulus of the intermediate adhesive layer (8) is less than 10 MPa.