Display device having contact holes' taper angle larger in display region than in terminal region

A display device, wherein

• respective regions of a display part and a terminal part are formed on a surface of a substrate,
• a first insulation film is formed on the display part and the terminal part and a second insulation film is formed on other region except for at least a periphery of the terminal part sequentially,
• first through holes are formed in the display part in a state that the first through holes penetrate the second insulation film and the first insulation film,
• second through holes are formed in the terminal pad in a state that the second through hole which is formed in the first insulation film,
• an angle of side wall surfaces of the second through holes in the first insulation film which is made with respect to the substrate is set smaller than an angle of side wall surfaces of the first through holes in the first insulation film which is made with respect to the substrate, and
• an angle of a side wall surface of an edge of the second insulation film on a terminal part side which is made with respect to the substrate is set smaller than an angle of the side wall surfaces of the first through holes in the second insulation film which is made with respect to the substrate.

A display device comprising:

• first contact hole formed in a display region and second contact hole formed in a terminal region;
• first insulating layer and second insulating layer formed in that order;
• wherein a taper angle of the first insulating layer at the first contact hole is larger than a taper angle of the first insulating layer at the second contact hole, and
• a taper angle of the second insulating layer at the first contact hole is larger than a taper angle of the second insulating layer around the second contact hole.