Liquid crystal display device and method for fabricating the same

A method for fabricating a liquid crystal display (LCD) device, comprising:

• preparing a first substrate having a plurality of pixels defined thereon;
• forming a gate electrode of a thin film transistor on each pixel of the first substrate by using a first mask;
• forming a gate insulating layer on the first substrate;
• forming active layer and source and drain electrodes of the thin film transistor and first and second layers of a protrusion on the gate insulating layer by using a second mask;
• forming a protection film covered on the source and drain electrodes of the thin film transistor and the second layer of the protrusion, and forming a contact hole for exposing part of the drain electrode on the protection film by using a third mask;
• forming a pixel electrode coming in contact with the drain electrode through the contact hole and a third layer of the protrusion by using a fourth mask;
• preparing a second substrate;
• forming a plurality of column spacers on the second substrate, wherein part of the plurality of column spacers is overlapped with the protrusion on the first substrate;
• and
• bonding the first substrate to the second substrate.