line 117 a since a pattern extended from the drain electrode 117 b overlaps the scanning line 111 completely even if there is a misalignment between the scanning line 111 and the signal line 117 a the capacitance between the scanning line 111 and the drain line 117 b is always maintained constant accordingly the u03b4vp and u03b4vpxl involved in the effective voltage for driving the lcd are maintained constant owing to the cgs cgd and ccross which are always constant regardless of the misalignment in the drawing u2018 u03b4 u2019 is greater than a movement caused by the misalignment of the scanning line 111 and the signal line 117 a u2018 u03b4 u2019 is greater than a movement caused by the misalignment of the scanning line 111 and the channel layer 115 and u201c u03b4 u201d is greater than a movement caused by the misalignment of the signal line 117 a and the channel layer 115 fig3 illustrates a plan view of a unit pixel of an lcd in accordance with another preferred embodiment of the present invention wherein reference symbols are the same as the foregoing embodiment and operation of the present embodiment is also the same this embodiment is different from the previous embodiment in that a portion for the channel layer is extended by u2018 u03b2 u2019 to increase a width u2018 w u2019 of the channel layer on the scanning line which is wider than a variation of the cgd caused by the misalignment to assure a more stable operation of the.