Patent ID: 8634036

Claim:
A transflective liquid crystal display device comprising: a first substrate divided into a pixel part and first and second pad parts; a gate electrode and a gate line formed of a first conductive film at the pixel part of the first substrate; a first insulation film formed on the first substrate with the gate electrode and a gate line formed thereon; an active pattern formed as an island at an upper portion of the gate electrode, wherein the active pattern is flat owing to having a width smaller than the gate electrode; a flat type of an ohmic-contact layer formed of an n+ amorphous silicon thin film on the active pattern; a flat type of a barrier metal layer formed of a second conductive film at an upper portion of the ohmic-contact layer, wherein the barrier metal layer is a single layer, is substantially patterned in the same size as the ohmic-contact layer and an entire lower portion of the barrier metal layer contacts with the ohmic-contact layer; source and drain electrodes formed of a fourth conductive film over the barrier metal layer and electrically connected with source and drain regions of the active pattern via the ohmic-contact layer and the barrier metal layer; a data line formed at the pixel part of the first substrate and crossing the gate line to define a pixel region including a reflective portion and a transmissive portion; a pixel electrode formed of a third conductive film at the transmissive portion of the pixel region and electrically connected with the drain electrode; a source electrode pattern, a drain electrode pattern and a data line pattern formed of the third conductive film at lower portions of the source electrode, the drain electrode and the data line, respectively, wherein the barrier metal layer reduces contact resistance between the ohmic-contact layer and the source/drain electrode patterns and wherein an entire upper portion of the barrier metal layer contacts with the source/drain electrode patterns; a second insulation film exposing the pixel electrode of the pixel region on the first substrate with the source and drain electrodes formed thereon; a reflective electrode formed of a fifth conductive film at the reflective portion of the pixel region and electrically connected with the drain electrode and the pixel electrode; and a second substrate attached to the first substrate in a facing manner.