Patent ID: 7545365
Filing Date: 2009-06-09
Classification: G06F

Abstract:
1. A touch sensor comprising: a substrate capable of propagating acoustic waves, the substrate including a first surface having a touch sensitive region and including a first sidewall intersecting the first surface at a first edge; and a transmitter, provided on the first sidewall of the substrate, for generating acoustic waves that propagate directly from the first sidewall through at least a portion of the touch sensitive region, said acoustic wave (i) comprising a shear wave and (ii) forming an acute angle with the first sidewall, and said transmitter comprising (i) a piezoelectric transducer comprising a first conductive layer provided on the first sidewall, a piezoelectric material applied over the first conductive layer, and a second conductive layer provided as a continuous covering over the piezoelectric material, the piezoelectric material having been thermally cured after application to the first conductive layer, and (ii) a periodic modulation layer.