초록 ▼

A capacitive touch pad comprises a substrate material, such as a PC board type laminate material, having a plurality of first parallel conductive traces running in a first (X) direction disposed on a first face thereof, and a plurality of second parallel conductive traces running in a second (Y) dir

A capacitive touch pad comprises a substrate material, such as a PC board type laminate material, having a plurality of first parallel conductive traces running in a first (X) direction disposed on a first face thereof, and a plurality of second parallel conductive traces running in a second (Y) direction, usually orthogonal to the first direction, disposed on an opposed second face thereof. A layer of pressure-conductive material is disposed over one of the faces of the substrate. A protective layer with a conductive coating on its back surface is disposed over the top surface of the pressure-conductive material to protect it. In an alternate embodiment, a capacitive touch sensor comprises a rigid substrate material having a conducting material disposed on one face thereof. A layer of pressure-conductive material is disposed over the conductive material on the substrate. A flexible material, having a plurality of first parallel conductive traces running in a first (X) direction disposed on a first face thereof, and a plurality of second parallel conductive traces running in a second (Y) direction disposed on an opposed second face thereof is disposed over the layer of pressure-conductive material. A protective layer is disposed over the top surface of the pressure conductive material to protect it. In yet another embodiment, an air gap is used in place of the layer of pressure-conductive material and the upper layers are supported by a frame at the periphery of the touchpad.

대표청구항 ▼

[ What is claimed is:] [1.] A capacitive touch pad comprising:a rigid substrate having first and second opposing faces;an X-trace layer having a plurality of first parallel conductive traces running in a first direction, said first parallel sensing conductive traces lying in a plane parallel to said

[ What is claimed is:] [1.] A capacitive touch pad comprising:a rigid substrate having first and second opposing faces;an X-trace layer having a plurality of first parallel conductive traces running in a first direction, said first parallel sensing conductive traces lying in a plane parallel to said first face of said substrate, said X-trace layer disposed on said first face of said substrate;a Y-trace layer having a plurality of second parallel sensing conductive traces running in a second direction orthogonal to said first direction, said second parallel sensing conductive traces lying in a plane parallel to said second face of said substrate, said Y-trace layer disposed on said second face of said substrate;a layer of compliant material disposed said substrate;a layer of conducting material disposed on an upper surface of said layer of compliant material; anda protective layer disposed on an upper surface of said layer of conducting material.