Single-layer projected capacitive touch panel and method of manufacturing the same
A single-layer projected capacitive touch panel has a glass cover, a touch sensing circuit layer, an insulating ink layer, a conductive wire layer, an insulator layer, a conductive glue layer and a flexible printed circuit (FPC) board. The touch sensing circuit layer, the insulating ink layer, the conductive wire layer, the insulator layer and the conductive glue layer are mounted on a circuit surface of the glass cover in sequence. The insulating ink layer covers the touch sensing circuit layer and has multiple through slots. Each through slot is filled with an electric conductor. The FPC is fastened on the conductive wire layer by a conductive glue layer. Therefore, the touch panel of the present invention is thinner, provides better penetrability and costs less than conventional projected capacitive touch panels.
1. A single-layer projected capacitive touch panel, comprising:
a glass cover having an operating surface and a circuit surface;
a touch sensing circuit layer with multiple edge zones and a touch zone, mounted on the circuit surface;
an insulating ink layer formed on the edge zones, having multiple through slots on the edge zones such that the through slots correspond to and expose the touch sensing circuit layer, each through slot has an electric conductor therein, and color of each electric conductor is similar to color of the insulating ink layer;
a conductive wire layer formed on the insulating ink layer and the electric conductors, thereby electronically connecting the touch sensing circuit layer via the electric conductors;
an insulator layer with a breach, formed on the conductive wire layer, such that the breach partially exposes the conductive wire layer;
a conductive glue layer mounted on the breach, covering the exposed conductive wire layer; and
a flexible printed circuit (FPC) board attached to the conductive glue layer thereby electronically connecting to the conductive wire layer via the conductive glue layer.
2. The single-layer projected capacitive touch panel of claim 1 , further comprising a consolidating glue layer, wherein the consolidating glue layer is applied to and between the FPC board and the glass cover.
3. The single-layer projected capacitive touch panel of claim 1 , wherein the touch zone of the touch sensing circuit layer is defined by the touch sensing circuit layer uncovered by the insulating ink layer.
4. A method of manufacturing a single-layer projected capacitive touch panel comprising steps of:
providing a glass parent board divided into multiple glass covers, with each glass cover having an operating surface and a circuit surface;
forming a touch sensing circuit layer on each glass cover, with each touch sensing circuit layer having multiple edge zones and a touch zone and partially formed on the circuit surface of each glass cover;
forming an insulating ink layer on each touch sensing circuit layer, with each insulating ink layer formed on the edge zones partially covering touch sensing circuit layer, such that each insulating ink layer having multiple through slots on the edge zones corresponds to and exposes each touch sensing circuit layer;
forming electric conductor into the through slots, such that color of each electric conductor is similar to color of the insulating ink layer;
forming a conductive wire layer on each insulating ink layer to contact with the electric conductors, thereby electronically connecting each touch sensing circuit layer via the electric conductors;
forming an insulator layer with a breach on each conductive wire layer, such that the breach partially exposes each conductive wire layer;
separating the glass parent board into multiple glass covers; and
installing a flexible printed circuit (FPC) board on the breach and the exposed conductive wire layer on one separated glass cover with a conductive glue layer, such that the FPC board electronically connects to the conductive wire layer via the conductive glue layer.
5. The method of claim 4 further comprising a step of applying a consolidating glue layer to and between the FPC board and the glass cover after the step of installing the FPC board.
6. The method of claim 4 , wherein the touch zone of the touch sensing circuit layer is defined by the touch sensing circuit layer uncovered by the insulating ink layer.