Pressure sensor, manufacturing method thereof, and display device having the same

A display device comprising:

• a display panel configured to display an image;
• and
• a pressure sensor disposed on one surface of the display panel, the pressure sensor sensing the pressure of a touch applied to the display panel,
• wherein the pressure sensor includes:
• a base substrate including an embossed pattern;
• a first conductive layer disposed on the base substrate;
• a pressure sensitive material layer disposed on the first conductive layer such that its electrical characteristic is varied corresponding to a strain applied thereto, the pressure sensitive material layer including a dielectric and nanoparticles dispersed in the dielectric;
• and
• a second conductive layer disposed on the pressure sensitive material layer,
• wherein the dielectric and the nanoparticle include materials having pyroelectricities of polarities opposite to each other,
• wherein the pressure sensitive material layer is formed by depositing the pressure sensitive material layer on the substrate while the substrate is stretched, and
• wherein the first conductive layer has a curved surface corresponding to the embossed pattern.