Patent ID: 8940566
Filing Date: 2015-01-27
Classification: G02F,H01L

Abstract:
1. A production method of a display device including a transistor portion having a thin film transistor, a Cs portion having a pixel electrode and a storage capacitor, and a terminal portion having a connecting portion for connecting an upper layer wiring and a lower layer wiring, comprising the steps of: (A2) forming a gate electrode, a gate insulating layer, and an oxide semiconductor layer of the thin film transistor, the storage capacitor of the Cs portion, and the lower layer wiring of the terminal portion, on a substrate; (B2) forming a protecting layer by a spin-on-glass technique so as to cover the oxide semiconductor layer, the storage capacitor, and the lower layer wiring; (C2) forming a source electrode and a drain electrode of the thin film transistor, and the upper layer wiring of the terminal portion, on the protecting layer; (D2) forming a first and a second contact holes in the protecting layer in the transistor portion, forming a third contact hole in the protecting layer on the storage capacitor, and removing the protecting layer on at least part of the lower layer wiring of the terminal portion; and (E2) forming a transparent electrode on the first, second, and third contact holes, and in the terminal portion, wherein the source electrode and the drain electrode, and the oxide semiconductor layer are electrically connected via the transparent electrode, the transparent electrode and a counter electrode of the storage capacitor are electrically connected in the Cs portion, and the lower layer wiring and the upper layer wiring are electrically connected via the transparent electrode in the terminal portion; and the production method further comprising, between steps (C2) and (D2): in the step (D2), the interlayer insulating layer and the protecting layer under the plurality of contact holes are removed, thereby forming the first, second and third contact holes.