Patent ID: 7075614

Claim:
A method of making an active matrix substrate, the method comprising: forming switching elements disposed in a shape of a matrix, gate signal lines controlling the switching elements and extending in a first direction, and source signal lines connected to the switching elements and extending in a second direction perpendicular to the first direction on a front surface of a light permeable substrate; forming an interlayer insulating film on the switching elements, the gate signal lines, and the source signal lines; forming on the interlayer insulating film a negative type photosensitive transparent conductive material for a pixel electrode whose exposed parts are left in a pattern; performing exposure from a back surface side of the light permeable substrate in order to expose the negative type photosensitive transparent conductive material in a self-alignment fashion by using the gate signal lines and the source signal lines as exposure masks; developing the negative type photosensitive transparent conductive material so as to obtain pixel electrodes of the negative type photosensitive transparent conductive material by removing unexposed parts of the negative type photosensitive transparent conductive material.