Patent ID: 8519449

Claim:
A strain sensor, comprising: a flexible substrate; a thin-film transistor structure comprising at least one piezoelectric material layer formed below a semiconductor layer and deposited on said flexible substrate, wherein said at least one piezoelectric material layer generates an electric charge resulting in a modulation of a transistor current; a metal gate layer located on said flexible substrate with respect to a source region and a drain region, wherein said at least one piezoelectric material layer of said thin-film transistor structure provides for an increased sensitivity and enhanced device control with respect to said strain sensor; and wherein said thin-film transistor structure comprises a dual gate field effect sensor having said semiconductor layer sandwiched above said at least one piezoelectric material layer and below a second piezoelectric layer included in a structure of said dual gate field effect sensor wherein at least one channel region of said semiconductor layer is modulated by strain in said at least one piezoelectric material layer and said second piezoelectric layer.