Patent ID: 6331880
Filing Date: 2001-12-18
Classification: G02F

Abstract:
A method of forming a liquid crystal display including a thin film transistor, a method comprising the steps of:forming a gate electrode on a substrate;sequentially forming a gate insulating layer, a first semiconductor layer, and a second semiconductor layer over the substrate and gate electrode;forming a conductive layer including a data line and source and drain electrodes on respective portions of the second semiconductor layer; andselectively removing the first and second semiconductor layers so that the first and second semiconductor layers remain under the data line and on an active area of the thin film transistor, and a peripheral edge of the remaining first semiconductor layer is not covered by the source or drain electrode, the peripheral edge being substantially parallel to the data line,wherein the step of selectively removing the first and second semiconductor layers includes the steps of:patterning the second semiconductor layer by using at least a portion of the conductive layer as a mask; andpatterning the first semiconductor layer using a photoresist mask so that the first semiconductor layer remains at least in an active area including under the source and drain electrodes and a channel region of the thin film transistor.