Patent ID: 8823685
Filing Date: 2014-09-02
Classification: G06F

Abstract:
1. An acoustic touch apparatus, comprising; a substrate having a first surface and a second surface, the first and second surfaces capable of propagating surface acoustic waves, the second surface comprising a touch region and the first and second surfaces coupled via a rounded connecting surface; at least one acoustic wave transducer on the first surface; and at least one reflective array on the first surface, said transducer capable of transmitting or receiving surface acoustic waves to and from said reflective array, said substrate and said reflective array capable of acoustically coupling surface acoustic waves to propagate between the first and second surfaces, and said substrate having a border region on the first surface that is adapted to hide from view through the substrate the transducer and the reflective array and to preclude distortion of surface acoustic waves propagating over a window in the border region via an acoustic lens that counteracts a phase shift of surface acoustic waves propagating over the window, wherein the border region comprises a border layer on the first surface.