Touch screen panel and method for manufacturing the same
A touch screen panel includes a substrate including an active area, a non-active area at the periphery of the active area, and a contact area between the active area and the non-active area, sensing electrodes disposed in the active area, connecting lines disposed in the non-active area and the contact area and electrically connected to the sensing electrodes, and a metal capping layer disposed in the contact area, in which the sensing electrodes include a first overcoating layer disposed on the substrate as a conductor layer, and a second overcoating layer disposed on the first overcoating layer, the connecting lines include the first overcoating layer, the second overcoating layer, and a metal line layer disposed on the second overcoating layer, and the metal capping layer couple the metal line layer to the first overcoating layer through a contact hole to expose the first overcoating layer in the contact area.
1. A touch screen panel, comprising:
a substrate comprising:
an active area,
a non-active area outside the active area, and
a contact area between the active area and the non-active area;
sensing electrodes disposed in the active area;
a connecting line disposed in the non-active area and the contact area, the connecting line being electrically connected to a sensing electrode among the sensing electrodes; and
a metal capping layer disposed in the contact area,
wherein the sensing electrodes comprise:
a first overcoating layer disposed on the substrate as a conductor layer, and
a second overcoating layer disposed on the first overcoating layer,
wherein the connecting line comprises:
the first overcoating layer;
the second overcoating layer; and
a metal line layer disposed on the second overcoating layer, the second overcoating layer being disposed, in a direction normal to a surface of the substrate, between the metal line layer and the first overcoating layer, and
wherein the metal capping layer couples the metal line layer to the first overcoating layer through a contact hole in the second overcoating layer, the contact hole exposing the first overcoating layer in the contact area.
2. The touch screen panel of claim 1 , wherein:
the connecting line is one of a plurality of connecting lines; and
each connecting line among the connecting lines is respectively connected to a different sensing electrode among the sensing electrodes.
3. The touch screen panel of claim 1 , wherein the sensing electrodes comprise:
first sensing electrodes disposed in a first direction;
second sensing electrodes disposed in a second direction intersecting the first direction; and
bridge patterns electrically connecting two adjacent first sensing electrodes.
4. The touch screen panel of claim 1 , further comprising an organic layer disposed on the second overcoating layer in the active area and the metal line layer in the non-active area.
5. The touch screen panel of claim 2 , wherein the metal capping layer is further disposed on the metal line layer that corresponds to a pad portion.
6. The touch screen panel of claim 3 , wherein the bridge patterns comprise the metal capping layer disposed on the first overcoating layer.
7. The touch screen panel of claim 1 , wherein the first overcoating layer comprises a metal nanowire layer.
8. The touch screen panel of claim 1 , wherein:
the second overcoating layer comprises an acrylic-based or silicone-based monomer; and
the thickness of the second overcoating layer is in a range of about 50 nm to about 5 μm.
9. The touch screen panel of claim 1 , wherein the metal line layer comprises copper or aluminum.
10. The touch screen panel of claim 1 , wherein:
the metal capping layer comprises an indium tin oxide (ITO) or titanium (Ti) based corrosion resistance alloy; and
the thickness of the metal capping layer is substantially equal to or greater than about 500 Å.
11. The touch screen panel of claim 1 , further comprising a thin-film transistor (TFT) backplane,
wherein the substrate is disposed on the TFT backplane.