Liquid crystal display device
View Patent ↗An LCD device according to the present invention includes having first and second substrates facing each other gate and data lines crossing each other to define a pixel region, a thin film transistor including a gate electrode protruding from the gate line, a source electrode protruding from the data line and a drain electrode spaced from the source electrode at a predetermined interval, a metal pattern over a predetermined portion of the gate line, a passivation layer over the data line and the metal pattern to have a contact hole exposing the drain electrode and a storage hole exposing the metal pattern, a pixel electrode on the pixel region over the contact hole and the storage hole, a column spacer contacting with the pixel electrode through the storage hole and a liquid crystal layer between the first and second substrates.
1. An LCD device comprising: first and second substrates facing each other; gate and data lines on the first substrate defining a pixel region; a thin film transistor comprising: a gate electrode protruding from the gate line; a source electrode protruding from the data line; and a drain electrode spaced from the source electrode at a predetermined interval; a metal pattern disposed over a predetermined portion of the gate line; at least one passivation layer disposed over the data line and the metal pattern, the passivation layer having a contact hole exposing the drain electrode and a storage hole exposing the metal pattern, wherein the at least one passivation layer comprises an organic insulating layer; a pixel electrode disposed on the pixel region over the contact hole and the storage hole; a column spacer configured to contact the pixel electrode in the storage hole for reducing instantaneous light leakage when a touch is laterally applied to one of the first substrate and the second substrate; and a liquid crystal layer between the first and second substrates, wherein the at least one passivation layer has a thickness of about 2 μm to 3 μm and a cell gap of the liquid crystal layer is about 3 μm to 5 μm, wherein a width of the storage hole is a critical dimension corresponding to a value obtained by adding a critical dimension of the column spacer to a bonding margin, the bonding margin being laterally about 4 μm to 5 μm and wherein a depth of the storage hole defined by removing the at least one passivation layer on the metal pattern is about ½˜1 time of the cell gap of the liquid crystal layer.
2. The LCD device as claimed in claim 1 , wherein the pixel electrode partially overlaps data lines at both sides adjacent to the pixel region.
3. The LCD device as claimed in claim 1 , wherein the at least one passivation layer further comprises an inorganic insulating layer.
4. The LCD device as claimed in claim 1 , further comprising a gate insulating layer between the gate line and the data line.
5. The LCD device as claimed in claim 1 , wherein the metal pattern is in the same layer as the data line.
6. The LCD device as claimed in claim 1 , further comprising:
a black matrix layer formed on the second substrate over non-pixel regions, including the thin film transistor;
a color filter layer formed over the second substrate and the black matrix layer; and
a common electrode formed over the second substrate, including the black matrix layer and the color filter layer.
7. The LCD device as claimed in claim 1 , further comprising a color filter layer between the data line and the passivation layer.
8. The LCD device as claimed in claim 7 , further comprising a black matrix layer formed on the first substrate to correspond to non-pixel regions, including the thin film transistor.
9. The LCD device as claimed in claim 1 , wherein the column spacer contacts the pixel electrode through the storage hole.