Touch screen panel and method of manufacturing the same
A method of manufacturing touch screen panels includes forming a photoresist film on a first surface of a substrate having high transmittance, removing the photoresist film in regions between unit cells by utilizing exposing and developing processes, etching the substrate in the regions where the photoresist film has been removed, removing the photoresist film from the substrate after the etching, performing a tempering process on the substrate including the etched regions, forming touch screen panels at the unit cells defined by the etched regions on the first surface of the substrate, and cutting the substrate at the etched regions to separate the touch screen panels.
1. A method of manufacturing touch screen panels, comprising:
forming a photoresist film on a first surface of a substrate having high transmittance;
removing the photoresist film in regions between unit cells by utilizing exposing and developing processes;
etching the substrate in the regions where the photoresist film has been removed;
removing the photoresist film from the substrate after the etching;
performing a tempering process on the substrate including the etched regions;
forming touch screen panels at the unit cells defined by the etched regions on the first surface of the substrate; and
cutting the substrate at the etched regions to separate the touch screen panels.
2. The method as claimed in claim 1 , wherein the forming the touch screen panels at the unit cells comprises sequentially forming first sensing patterns, second sensing patterns, an insulating layer, an adhesive layer, a buffer film, and a ground electrode layer at each of the unit cells.
3. The method as claimed in claim 2 , wherein the first sensing patterns are coupled to each other in a first direction, and wherein the second sensing patterns are coupled to each other in a second direction that crosses the first direction.
4. The method as claimed in claim 1 , wherein the performing the tempering process comprises steeping the substrate in a KNO 3 solution to heat the substrate at a temperature between 400° C. and 450° C. for approximately 15 to 18 hours.
5. The method as claimed in claim 4 , wherein the substrate comprises glass, and wherein the tempering process replaces a sodium (Na) component on surfaces of the substrate with a potassium (K) component.
6. The method as claimed in claim 1 , further comprising etching a second surface of the substrate opposite the first surface at the regions between the unit cells after forming the touch screen panels and prior to cutting the substrate, such that a tempered surface at the regions between the unit cells on the second surface of the substrate is removed.
7. The method as claimed in claim 1 , wherein the etching comprises dry etching.