Align key for a TOC/COT-type liquid crystal display device and method of fabricating the same

A TOC/COT-type liquid crystal display (LCD) device, comprising:

• a first substrate having an active area and a non-active area, wherein a thin film transistor, a pixel electrode and a color filter are formed thereon;
• a second substrate having a common electrode formed thereon, wherein the first and second substrates are facing each other at a predetermined space therebetween;
• a liquid crystal material layer disposed between the first and second substrates;
• a first align key formed on the non-active area of the first substrate;
• and
• a second align key formed on the second substrate facing and aligning with the first align key, the second align key being formed of silver paste.

A TOC/COT-type liquid crystal display (LCD) device, comprising;

• a first substrate having an active area, a non-active area, a thin film transistor, a pixel electrode and a color filter formed thereon;
• a second substrate having a common electrode formed thereon, wherein the first and second substrates face each other at a predetermined space therebetween;
• a liquid crystal layer disposed between the first and second substrates;
• a seal pattern in a boundary region of the active area and the non-active area;
• a first align key on the non-active area of the first substrate;
• and
• a second align key on the second substrate facing and aligning with the first align key, the second align key being formed of an organic polymer by a screen-print method.

A method of fabricating a TOC/COT-type liquid crystal display (LCD) device, comprising the steps of:

• forming a first substrate having an active area and a non-active area, wherein a thin film transistor, a pixel electrode, a color filter and a first align key are formed thereon within the non-active area;
• forming a second substrate having a common electrode formed thereon;
• arranging the second substrate facing the first substrate with a predetermined space therebetween;
• cleaning the first and second substrates;
• forming a second align key on the non-active area of the second substrate with silver paste;
• forming alignment layers respectively on the first and second substrates using the first and second align keys as a base;
• forming a seal pattern on one of the first and second substrates;
• dispensing spacers between the first and second substrates;
• assembling the first and second substrates using the first and second align keys as a base;
• cutting the assembled substrates into an individual liquid crystal cell;
• injecting liquid crystal material into the liquid crystal cell;
• and
• sealing the liquid crystal cell.

A method of fabricating a TOC/COT-type liquid crystal display (LCD) device, comprising the steps of:

• forming a first substrate having an active area and a non-active area, wherein a thin film transistor, a pixel electrode, a color filter and a first align key formed within the non-active area;
• forming a second substrate having a common electrode;
• arranging the second substrate facing the first substrate with a predetermined space therebetween;
• cleaning the first and second substrates;
• forming a second align key on the non-active area of the second substrate with an organic polymer by a screen mask;
• forming alignment layers respectively on the first and second substrates using the first and second align keys as a base;
• forming a seal pattern on the second substrate;
• dispensing spacers between the first and second substrates;
• assembling the first and second substrates using the first and second align keys as a base;
• cutting the assembled substrates into an individual liquid crystal cell;
• injecting liquid crystal material into the liquid crystal cell;
• and
• sealing the liquid crystal cell.