A display device and a method of manufacturing a display panel are provided. A first metal layer is provided on a substrate, an insulating layer is provided on the first metal layer with the insulating layer covering the substrate, the active layer is provided on the substrate, a second metal layer is provided on the active layer, and a passivation layer is provided on the second metal layer with the passivation layer covering the active layer. The material of passivation layer is comprises low dielectric material such that the provided passivation layer has a low dielectric constant.