Liquid crystal display device having spacer density and method of fabricating the same

1. A liquid crystal display device, comprising:

first and second substrates;

a plurality of gate lines and data lines on the first substrate;

a plurality of switching devices at cross portions of the gate and data lines;

a passivation layer on the plurality of switching devices;

a plurality of ball spacers on the passivation layer, wherein a density of the ball spacers is between about 25/cm 2 and about 150/cm 2 ;

a color filter layer on the second substrate; and

a plurality of column spacers on the color filter layer,

wherein a density of the column spacers is at least 0.24%.

2. The device according to claim 1 , wherein the density of the plurality of column spacers is within a range of 0.24% and 1.2%.

3. The device according to claim 1 , wherein the plurality of ball spacers are formed on the second substrate with the plurality of column spacers.

4. A method of fabricating a liquid crystal display device, comprising:

forming a first substrate including a plurality of ball spacers, wherein a density of ball spacers is between about 25/cm 2 and about 150/cm 2 ;

forming a second substrate including a plurality of column spacers;

bonding the first and second substrates together by pressure-hardening;

cutting the bonded first and second substrates into a plurality of unit liquid crystal display cells;

forming a liquid crystal material layer within each of the unit liquid crystal display cells through an injection hole; and

pressure-sealing the injection hole of each of the unit liquid crystal display cells,

wherein a density of the column spacers is at least 0.24%.

5. The method according to claim 4 , wherein the density of the plurality of column spacers is within a range of 0.24% and 1.2%.

6. The method according to claim 4 , wherein the plurality of ball spacers are formed on the second substrate together with the plurality of column spacers.

7. The method according to claim 4 , wherein forming a first substrate includes:

forming a plurality of gate lines on the first substrate;

forming an insulating layer on the plurality of gate lines;

forming a semiconductor layer on the insulating layer;

forming a plurality of data lines on the semiconductor layer;

forming a passivation layer on the plurality of data lines;

forming a plurality of pixel electrodes on the passivation layer; and

forming the plurality of ball spacers on the passivation layer.

8. The method according to claim 4 , wherein forming a second substrate includes:

forming a black matrix layer on the second substrate;

forming a color filter layer on the black matrix layer;

forming the plurality of column spacers on the color filter layer;

forming an alignment layer on the plurality of column spacers; and

forming a sealant on the alignment layer.

9. A method of fabricating a liquid crystal display device, comprising:

forming a first substrate including a plurality of ball spacers, wherein a density of ball spacers is between about 25/cm 2 and about 150/cm 2 ;

forming a second substrate including a plurality of column spacers, the column spacers have a density of at least 0.24%; and

forming a liquid crystal layer between the first and second substrates.

10. The method according to claim 9 , further comprising:

bonding the first and second substrates; and

cutting the bonded first and second substrates into a plurality of unit liquid crystal display cells.

11. The method according to claim 10 , further comprising pressure-sealing the unit liquid crystal display cells.

12. The method according to claim 9 , wherein the density of the plurality of column spacers is within a range of 0.24% and 1.2%.

13. The method according to claim 9 , wherein the plurality of ball spacers are formed on the second substrate together with the plurality of column spacers.

14. The method according to claim 9 , wherein forming a first substrate includes:

forming a plurality of gate lines on the first substrate;

forming an insulating layer on the plurality of gate lines;

forming a semiconductor layer on the insulating layer;

forming a plurality of data lines on the semiconductor layer;

forming a passivation layer on the plurality of data lines;

forming a plurality of pixel electrodes on the passivation layer; and

forming the plurality of ball spacers on the passivation layer.

15. The method according to claim 9 , wherein forming a second substrate includes:

forming a black matrix layer on the second substrate;

forming a color filter layer on the black matrix layer;

forming the plurality of column spacers on the color filter layer;

forming an alignment layer on the plurality of column spacers; and

forming a sealant on the alignment layer.

16. The method according to claim 15 , further comprising a common electrode on the color filter layer.

17. The method according to claim 15 , further comprising an overcoat layer on the color filter layer.