Photosensitive thin film device and biometric information sensing apparatus including the photosensitive thin film device

A biometric information sensing apparatus comprising:

• a substrate that is transparent and insulative;
• a light sensor array comprising a plurality of pixels arranged in a matrix form on the substrate, each of the pixels comprising a photosensitive thin film device;
• and
• a light-emission unit arranged on the light sensor array and configured to emit light,
• wherein the photosensitive thin film device comprises:
• a first semiconductor pattern of a ring type having an inner edge and an outer edge, the first semiconductor pattern being on the substrate;
• a first electrode arranged inside the inner edge on the substrate and connected to the first semiconductor pattern;
• a second electrode surrounding a perimeter of the first semiconductor pattern along the outer edge;
• an interlayer insulating layer arranged on the first semiconductor pattern and the first and second electrodes and having a first aperture exposing the first electrode;
• and
• a light barrier electrode comprising an upper surface light barrier arranged on the interlayer insulating layer and covering an upper surface of the first semiconductor pattern, and a contact plug extending from the upper surface light barrier and connected to the first electrode via the first aperture.