Touch panel and manufacturing method therefor, and roll sheet of touch sensor

A roll sheet of touch sensors, comprising:

• a substrate, wherein the substrate is configured with a plurality of touch panels and a removing area, each of the touch panels comprises a display area, a peripheral area, a peripheral trace, a first cover layer and a touch sensing electrode, wherein a catalytic layer is formed on the peripheral area and the removing area, the peripheral trace is formed on the catalytic layer, the peripheral trace has a side wall and a top surface, the first cover layer covers the top surface of the peripheral trace, the peripheral trace and the first cover layer are formed on the peripheral area of each of the touch panels, the touch sensing electrode is formed on the display area of each of the touch panels, and the touch sensing electrode is electrically connected with the peripheral traces via the first cover layer;
• a mark formed on the catalytic layer, wherein the mark has a side wall and a top surface;
• and
• a second cover layer formed on the top surface of the mark, wherein the first cover layer comprises metal nanowires and the second cover layer comprises metal nanowires, wherein the touch sensing electrode, the first cover layer and the second cover layer are made of same metal nanowire layer.

A manufacturing method of a touch panel, comprising:

• providing a substrate, wherein the substrate comprises a display area and a peripheral area;
• forming a catalytic layer on the peripheral area;
• forming a metal layer on the catalytic layer;
• forming a metal nanowire layer on the display area and the peripheral area;
• and
• performing a patterning step for patterning the metal layer to form a peripheral trace and a mark, wherein the peripheral trace and the mark are formed on the catalytic layer, the peripheral trace has a side wall and a top surface, and the mark has a side wall and a top surface;
• wherein the patterning step patterns the metal nanowire layer to form a touch sensing electrode within the display area, a first cover layer and a second cover layer within the peripheral area, wherein the first cover layer covers the top surface of the peripheral trace, and the second cover layer covers the top surface of the mark.