Unimorph
From Infogalactic: the planetary knowledge core
A unimorph is a cantilever that consists of one active layer and one inactive layer.[1] In the case where active layer is piezoelectric, deformation in that layer may be induced by the application of an electric field. This deformation induces a bending displacement in the cantilever. The inactive layer may be fabricated from a non-piezoelectric material.
