ACTIVE MATRIX SUBSTRATE AND ACTIVE MATRIX DISPLAY DEVICE

摘要

A region in which trunk wiring (13a) with a wide line width is provided in an upper layer than branch wiring (13b) with a narrow line width, and the trunk wiring (13a) and the branch wiring (13b) are electrically connected, wherein the trunk wiring (13a) and the branch wiring (13b) overlap one another in a planar view with a gate insulating film therebetween, contact holes are formed in the gate insulating film so that the branch wiring (13b) is exposed, and the trunk wiring (13a) and the branch wiring (13b) are electrically connected via connecting conductors provided in the contact holes. As a result, a TFT array substrate which is not susceptible to causing a disconnection defect or a line width abnormality, and is capable of suppressing the expansion of a driver circuit region can be implemented.