Patent ID: 7088401

Claim:
A liquid crystal display device, comprising: a first electrode formed on a substrate as one of two electrodes of an accumulation capacitor, said first electrode comprising a portion of a gate bus line pattern of said liquid crystal display device; an insulating film formed on said first electrode to cover said first electrode; a second electrode formed on said first electrode via said insulating film as the other electrode of said accumulation capacitor and including a first conductive film and a second conductive film formed on said first conductive film; a protective insulating layer formed on said second electrode and having a contact hole which is formed over said first and second electrodes, a bottom of said contact hole being defined by said second conductive film; and a thin film transistor comprising source and drain electrodes which are formed on said insulating film and comprise said second conductive film, wherein one of said first conductive film and said second conductive film comprises a layer formed of a material selected from the group consisting of Al (Aluminum), W (Tungsten), Cu (Copper), Ta (Tantalum) and TaN (Tantalum Nitride).