A substrate has intersecting gate and data lines with a gate insulating
film therebetween, a thin film transistor provided at an intersection of
the gate and data lines, a pixel electrode connected to the transistor, a
pad connected to a signal line via a contact hole and containing a
transparent conductive film, and a protective film overlapping a color
filter array substrate to expose the film. The contact hole exposes the
end of the pad and/or signal line and an adjacent area. A gate electrode,
source and drain electrodes, and a contact electrode are formed from
first, second, and third conductive layers, respectively. A contact hole
exposes the first conductive layer of one transistor and an adjacent
portion of the second conductive layer of another transistor. The contact
electrode connects the exposed first and second conductive layers. Only
three mask processes are used in fabricating the substrate.